public static ReferenceDescriptionCollection Browse(Session session, BrowseDescription nodeToBrowse, bool throwOnError)
{
try
{
var descriptionCollection = new ReferenceDescriptionCollection();
var nodesToBrowse = new BrowseDescriptionCollection { nodeToBrowse };
BrowseResultCollection results;
DiagnosticInfoCollection diagnosticInfos;
session.Browse(null, null, 0U, nodesToBrowse, out results, out diagnosticInfos);
ClientBase.ValidateResponse(results, nodesToBrowse);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToBrowse);
while (!StatusCode.IsBad(results[0].StatusCode))
{
for (var index = 0; index < results[0].References.Count; ++index)
descriptionCollection.Add(results[0].References[index]);
if (results[0].References.Count == 0 || results[0].ContinuationPoint == null)
return descriptionCollection;
var continuationPoints = new ByteStringCollection();
continuationPoints.Add(results[0].ContinuationPoint);
session.BrowseNext(null, false, continuationPoints, out results, out diagnosticInfos);
ClientBase.ValidateResponse(results, continuationPoints);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, continuationPoints);
}
throw new ServiceResultException(results[0].StatusCode);
}
catch (Exception ex)
{
if (throwOnError)
throw new ServiceResultException(ex, 2147549184U);
return null;
}
}
/// <summary>
/// Reads the arguments for the method.
/// </summary>
private void ReadArguments(NodeId nodeId)
{
m_inputArguments = null;
m_outputArguments = null;
// build list of references to browse.
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
BrowseDescription nodeToBrowse = new BrowseDescription();
nodeToBrowse.NodeId = nodeId;
nodeToBrowse.BrowseDirection = BrowseDirection.Forward;
nodeToBrowse.ReferenceTypeId = Opc.Ua.ReferenceTypeIds.HasProperty;
nodeToBrowse.IncludeSubtypes = true;
nodeToBrowse.NodeClassMask = (uint)NodeClass.Variable;
nodeToBrowse.ResultMask = (uint)BrowseResultMask.BrowseName;
nodesToBrowse.Add(nodeToBrowse);
// find properties.
ReferenceDescriptionCollection references = ClientUtils.Browse(m_session, null, nodesToBrowse, false);
// build list of properties to read.
ReadValueIdCollection nodesToRead = new ReadValueIdCollection();
for (int ii = 0; references != null && ii < references.Count; ii++)
{
ReferenceDescription reference = references[ii];
// ignore out of server references.
if (reference.NodeId.IsAbsolute)
{
continue;
}
// ignore other properties.
if (reference.BrowseName != Opc.Ua.BrowseNames.InputArguments && reference.BrowseName != Opc.Ua.BrowseNames.OutputArguments)
{
continue;
}
ReadValueId nodeToRead = new ReadValueId();
nodeToRead.NodeId = (NodeId)reference.NodeId;
nodeToRead.AttributeId = Attributes.Value;
nodeToRead.Handle = reference;
nodesToRead.Add(nodeToRead);
}
// method has no arguments.
if (nodesToRead.Count == 0)
{
return;
}
// read the arguments.
DataValueCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
m_session.Read(
null,
0,
TimestampsToReturn.Neither,
nodesToRead,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, nodesToRead);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToRead);
// save the results.
for (int ii = 0; ii < results.Count; ii++)
{
ReferenceDescription reference = (ReferenceDescription)nodesToRead[ii].Handle;
if (StatusCode.IsGood(results[ii].StatusCode))
{
if (reference.BrowseName == Opc.Ua.BrowseNames.InputArguments)
{
m_inputArguments = (Argument[])ExtensionObject.ToArray(results[ii].GetValue<ExtensionObject[]>(null), typeof(Argument));
}
if (reference.BrowseName == Opc.Ua.BrowseNames.OutputArguments)
{
m_outputArguments = (Argument[])ExtensionObject.ToArray(results[ii].GetValue<ExtensionObject[]>(null), typeof(Argument));
}
}
}
// set default values for input arguments.
if (m_inputArguments != null)
{
foreach (Argument argument in m_inputArguments)
{
argument.Value = TypeInfo.GetDefaultValue(argument.DataType, argument.ValueRank, m_session.TypeTree);
}
}
}
/// <summary>
/// Invokes the Browse service.
/// </summary>
/// <param name="requestHeader">The request header.</param>
/// <param name="view">The view to browse.</param>
/// <param name="nodeToBrowse">The node to browse.</param>
/// <param name="maxResultsToReturn">The maximum number of returned values.</param>
/// <param name="browseDirection">The browse direction.</param>
/// <param name="referenceTypeId">The reference type id.</param>
/// <param name="includeSubtypes">If set to <c>true</c> the subtypes of the ReferenceType will be included in the browse.</param>
/// <param name="nodeClassMask">The node class mask.</param>
/// <param name="continuationPoint">The continuation point.</param>
/// <param name="references">The list of node references.</param>
/// <returns></returns>
public virtual ResponseHeader Browse(
RequestHeader requestHeader,
ViewDescription view,
NodeId nodeToBrowse,
uint maxResultsToReturn,
BrowseDirection browseDirection,
NodeId referenceTypeId,
bool includeSubtypes,
uint nodeClassMask,
out byte[] continuationPoint,
out ReferenceDescriptionCollection references)
{
BrowseDescription description = new BrowseDescription();
description.NodeId = nodeToBrowse;
description.BrowseDirection = browseDirection;
description.ReferenceTypeId = referenceTypeId;
description.IncludeSubtypes = includeSubtypes;
description.NodeClassMask = nodeClassMask;
description.ResultMask = (uint)BrowseResultMask.All;
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
nodesToBrowse.Add(description);
BrowseResultCollection results;
DiagnosticInfoCollection diagnosticInfos;
ResponseHeader responseHeader = Browse(
requestHeader,
view,
maxResultsToReturn,
nodesToBrowse,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, nodesToBrowse);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToBrowse);
if (StatusCode.IsBad(results[0].StatusCode))
{
throw new ServiceResultException(new ServiceResult(results[0].StatusCode, 0, diagnosticInfos, responseHeader.StringTable));
}
continuationPoint = results[0].ContinuationPoint;
references = results[0].References;
return responseHeader;
}
/// <summary>
/// Finds the targets for the specified reference.
/// </summary>
private static List<NodeId> FindTargetOfReference(Session session, List<NodeId> nodeIds, NodeId referenceTypeId, bool throwOnError)
{
try
{
// construct browse request.
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
for (int ii = 0; ii < nodeIds.Count; ii++)
{
BrowseDescription nodeToBrowse = new BrowseDescription();
nodeToBrowse.NodeId = nodeIds[ii];
nodeToBrowse.BrowseDirection = BrowseDirection.Forward;
nodeToBrowse.ReferenceTypeId = referenceTypeId;
nodeToBrowse.IncludeSubtypes = false;
nodeToBrowse.NodeClassMask = 0;
nodeToBrowse.ResultMask = (uint)BrowseResultMask.None;
nodesToBrowse.Add(nodeToBrowse);
}
// start the browse operation.
BrowseResultCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
session.Browse(
null,
null,
1,
nodesToBrowse,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, nodesToBrowse);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToBrowse);
List<NodeId> targetIds = new List<NodeId>();
ByteStringCollection continuationPoints = new ByteStringCollection();
for (int ii = 0; ii < nodeIds.Count; ii++)
{
targetIds.Add(null);
// check for error.
if (StatusCode.IsBad(results[ii].StatusCode))
{
continue;
}
// check for continuation point.
if (results[ii].ContinuationPoint != null && results[ii].ContinuationPoint.Length > 0)
{
continuationPoints.Add(results[ii].ContinuationPoint);
}
// get the node id.
if (results[ii].References.Count > 0)
{
if (NodeId.IsNull(results[ii].References[0].NodeId) || results[ii].References[0].NodeId.IsAbsolute)
{
continue;
}
targetIds[ii] = (NodeId)results[ii].References[0].NodeId;
}
}
// release continuation points.
if (continuationPoints.Count > 0)
{
session.BrowseNext(
null,
true,
continuationPoints,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, nodesToBrowse);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToBrowse);
}
//return complete list.
return targetIds;
}
catch (Exception exception)
{
if (throwOnError)
{
throw new ServiceResultException(exception, StatusCodes.BadUnexpectedError);
}
return null;
}
}
private ReferenceDescriptionCollection Browse(StandardServer server, BrowseDescriptionCollection nodesToBrowse, bool throwOnError)
{
try
{
ReferenceDescriptionCollection references = new ReferenceDescriptionCollection();
BrowseDescriptionCollection unprocessedOperations = new BrowseDescriptionCollection();
while (nodesToBrowse.Count > 0)
{
// start the browse operation.
OperationContext context = new OperationContext(new RequestHeader(), RequestType.Browse);
BrowseResultCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
server.CurrentInstance.NodeManager.Browse(
context,
null,
0,
nodesToBrowse,
out results,
out diagnosticInfos);
ByteStringCollection continuationPoints = new ByteStringCollection();
for (int ii = 0; ii < nodesToBrowse.Count; ii++)
{
// check for error.
if (StatusCode.IsBad(results[ii].StatusCode))
{
// this error indicates that the server does not have enough simultaneously active
// continuation points. This request will need to be resent after the other operations
// have been completed and their continuation points released.
if (results[ii].StatusCode == StatusCodes.BadNoContinuationPoints)
{
unprocessedOperations.Add(nodesToBrowse[ii]);
}
continue;
}
// check if all references have been fetched.
if (results[ii].References.Count == 0)
{
continue;
}
// save results.
references.AddRange(results[ii].References);
// check for continuation point.
if (results[ii].ContinuationPoint != null)
{
continuationPoints.Add(results[ii].ContinuationPoint);
}
}
// process continuation points.
ByteStringCollection revisedContiuationPoints = new ByteStringCollection();
while (continuationPoints.Count > 0)
{
// continue browse operation.
server.CurrentInstance.NodeManager.BrowseNext(
context,
false,
continuationPoints,
out results,
out diagnosticInfos);
for (int ii = 0; ii < continuationPoints.Count; ii++)
{
// check for error.
if (StatusCode.IsBad(results[ii].StatusCode))
{
continue;
}
// check if all references have been fetched.
if (results[ii].References.Count == 0)
{
continue;
}
// save results.
references.AddRange(results[ii].References);
// check for continuation point.
if (results[ii].ContinuationPoint != null)
{
revisedContiuationPoints.Add(results[ii].ContinuationPoint);
}
}
// check if browsing must continue;
revisedContiuationPoints = continuationPoints;
}
// check if unprocessed results exist.
nodesToBrowse = unprocessedOperations;
}
// return complete list.
return(references);
}
catch (Exception exception)
{
if (throwOnError)
{
throw new ServiceResultException(exception, StatusCodes.BadUnexpectedError);
}
return(null);
}
}
/// <summary>
/// Browses the specified node.
/// </summary>
public ReferenceDescriptionCollection Browse(NodeId nodeId)
{
if (m_session == null)
{
throw new ServiceResultException(StatusCodes.BadServerNotConnected, "Cannot browse if not connected to a server.");
}
try
{
m_browseInProgress = true;
// construct request.
BrowseDescription nodeToBrowse = new BrowseDescription();
nodeToBrowse.NodeId = nodeId;
nodeToBrowse.BrowseDirection = m_browseDirection;
nodeToBrowse.ReferenceTypeId = m_referenceTypeId;
nodeToBrowse.IncludeSubtypes = m_includeSubtypes;
nodeToBrowse.NodeClassMask = m_nodeClassMask;
nodeToBrowse.ResultMask = m_resultMask;
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
nodesToBrowse.Add(nodeToBrowse);
// make the call to the server.
BrowseResultCollection results;
DiagnosticInfoCollection diagnosticInfos;
ResponseHeader responseHeader = m_session.Browse(
null,
m_view,
m_maxReferencesReturned,
nodesToBrowse,
out results,
out diagnosticInfos);
// ensure that the server returned valid results.
Session.ValidateResponse(results, nodesToBrowse);
Session.ValidateDiagnosticInfos(diagnosticInfos, nodesToBrowse);
// check if valid.
if (StatusCode.IsBad(results[0].StatusCode))
{
throw ServiceResultException.Create(results[0].StatusCode, 0, diagnosticInfos, responseHeader.StringTable);
}
// fetch initial set of references.
byte[] continuationPoint = results[0].ContinuationPoint;
ReferenceDescriptionCollection references = results[0].References;
// process any continuation point.
while (continuationPoint != null)
{
ReferenceDescriptionCollection additionalReferences;
if (!m_continueUntilDone && m_MoreReferences != null)
{
BrowserEventArgs args = new BrowserEventArgs(references);
m_MoreReferences(this, args);
// cancel browser and return the references fetched so far.
if (args.Cancel)
{
BrowseNext(ref continuationPoint, true);
return(references);
}
m_continueUntilDone = args.ContinueUntilDone;
}
additionalReferences = BrowseNext(ref continuationPoint, false);
if (additionalReferences != null && additionalReferences.Count > 0)
{
references.AddRange(additionalReferences);
}
else
{
Utils.Trace("Continuation point exists, but the browse results are null/empty.");
break;
}
}
// return the results.
return(references);
}
finally
{
m_browseInProgress = false;
}
}
/// <summary>
/// 读取一个节点的指定属性
/// </summary>
/// <param name="nodeId"></param>
/// <param name="attribute"></param>
/// <returns></returns>
private DataValue ReadNoteDataValueAttributes(NodeId nodeId, uint attribute)
{
NodeId sourceId = nodeId;
ReadValueIdCollection nodesToRead = new ReadValueIdCollection();
ReadValueId nodeToRead = new ReadValueId();
nodeToRead.NodeId = sourceId;
nodeToRead.AttributeId = attribute;
nodesToRead.Add(nodeToRead);
int startOfProperties = nodesToRead.Count;
// find all of the pror of the node.
BrowseDescription nodeToBrowse1 = new BrowseDescription();
nodeToBrowse1.NodeId = sourceId;
nodeToBrowse1.BrowseDirection = BrowseDirection.Forward;
nodeToBrowse1.ReferenceTypeId = ReferenceTypeIds.HasProperty;
nodeToBrowse1.IncludeSubtypes = true;
nodeToBrowse1.NodeClassMask = 0;
nodeToBrowse1.ResultMask = (uint)BrowseResultMask.All;
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
nodesToBrowse.Add(nodeToBrowse1);
// fetch property references from the server.
ReferenceDescriptionCollection references = FormUtils.Browse(m_OpcUaClient.Session, nodesToBrowse, false);
if (references == null)
{
return(null);
}
for (int ii = 0; ii < references.Count; ii++)
{
// ignore external references.
if (references[ii].NodeId.IsAbsolute)
{
continue;
}
ReadValueId nodeToRead2 = new ReadValueId();
nodeToRead2.NodeId = (NodeId)references[ii].NodeId;
nodeToRead2.AttributeId = Attributes.Value;
nodesToRead.Add(nodeToRead2);
}
// read all values.
DataValueCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
m_OpcUaClient.Session.Read(
null,
0,
TimestampsToReturn.Neither,
nodesToRead,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, nodesToRead);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToRead);
return(results[0]);
}
/// <summary>
/// Reads the properties for the node.
/// </summary>
private void ReadProperties(NodeId nodeId)
{
// build list of references to browse.
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
BrowseDescription nodeToBrowse = new BrowseDescription();
nodeToBrowse.NodeId = nodeId;
nodeToBrowse.BrowseDirection = BrowseDirection.Forward;
nodeToBrowse.ReferenceTypeId = Opc.Ua.ReferenceTypeIds.HasProperty;
nodeToBrowse.IncludeSubtypes = true;
nodeToBrowse.NodeClassMask = (uint)NodeClass.Variable;
nodeToBrowse.ResultMask = (uint)BrowseResultMask.All;
nodesToBrowse.Add(nodeToBrowse);
// find properties.
ReferenceDescriptionCollection references = ClientUtils.Browse(m_session, View, nodesToBrowse, false);
// build list of properties to read.
ReadValueIdCollection nodesToRead = new ReadValueIdCollection();
for (int ii = 0; references != null && ii < references.Count; ii++)
{
ReferenceDescription reference = references[ii];
// ignore out of server references.
if (reference.NodeId.IsAbsolute)
{
continue;
}
ReadValueId nodeToRead = new ReadValueId();
nodeToRead.NodeId = (NodeId)reference.NodeId;
nodeToRead.AttributeId = Attributes.Value;
nodeToRead.Handle = reference;
nodesToRead.Add(nodeToRead);
}
if (nodesToRead.Count == 0)
{
return;
}
// read the properties.
DataValueCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
m_session.Read(
null,
0,
TimestampsToReturn.Neither,
nodesToRead,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, nodesToRead);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToRead);
// add the results to the display.
for (int ii = 0; ii < results.Count; ii++)
{
ReferenceDescription reference = (ReferenceDescription)nodesToRead[ii].Handle;
TypeInfo typeInfo = TypeInfo.Construct(results[ii].Value);
// add the metadata for the attribute.
ListViewItem item = new ListViewItem(reference.ToString());
item.SubItems.Add(typeInfo.BuiltInType.ToString());
if (typeInfo.ValueRank >= 0)
{
item.SubItems[1].Text += "[]";
}
// add the value.
if (StatusCode.IsBad(results[ii].StatusCode))
{
item.SubItems.Add(results[ii].StatusCode.ToString());
}
else
{
item.SubItems.Add(results[ii].WrappedValue.ToString());
}
item.Tag = results[ii];
// display in list.
AttributesLV.Items.Add(item);
}
// set the column widths.
for (int ii = 0; ii < AttributesLV.Columns.Count; ii++)
{
AttributesLV.Columns[ii].Width = -2;
}
}
/// <summary>
/// Gets the properties.
/// </summary>
/// <param name="session">The session.</param>
/// <param name="requests">The requests.</param>
/// <param name="propertyIds">The property ids.</param>
/// <returns>The list of properities.</returns>
public IList<DaProperty> GetPropertyValues(Session session, ComDaReadPropertiesRequest[] requests, params int[] propertyIds)
{
TraceState("GetPropertyValues", requests.Length);
// select all supported properties if none provided
IList<DaProperty> properties = s_SupportedProperties;
if (propertyIds == null || propertyIds.Length == 0)
{
propertyIds = new int[s_SupportedProperties.Length];
for (int ii = 0; ii < propertyIds.Length; ii++)
{
propertyIds[ii] = s_SupportedProperties[ii].PropertyId;
}
}
// return the descriptions that match the requested properties.
else
{
properties = new DaProperty[propertyIds.Length];
for (int ii = 0; ii < propertyIds.Length; ii++)
{
for (int jj = 0; jj < s_SupportedProperties.Length; jj++)
{
if (propertyIds[ii] == s_SupportedProperties[jj].PropertyId)
{
properties[ii] = s_SupportedProperties[jj];
break;
}
}
}
}
// build a list of elements to create.
BrowseElement[] elements = new BrowseElement[requests.Length];
int[] indexes = new int[requests.Length];
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
for (int ii = 0; ii < requests.Length; ii++)
{
BrowseElement element = null;
// lookup element in cache.
lock (m_lock)
{
string itemId = requests[ii].ItemId;
if (String.IsNullOrEmpty(itemId))
{
requests[ii].Error = ResultIds.E_INVALIDITEMID;
elements[ii] = null;
continue;
}
// if (m_cache.TryGetValue(itemId, out element))
// {
// UpdateReadPropertyRequest(requests[ii], element, propertyIds);
// continue;
// }
// create a new element.
elements[ii] = element = new BrowseElement();
}
element.ItemId = requests[ii].ItemId;
element.NodeId = m_mapper.GetRemoteNodeId(element.ItemId);
// prepare a request to browse the children.
indexes[ii] = PrepareBrowseElementBrowseRequest(element.NodeId, nodesToBrowse);
}
// check if nothing more to do.
if (nodesToBrowse.Count == 0)
{
return properties;
}
// browse all elements at once.
BrowseResultCollection results = Browse(session, nodesToBrowse);
// validate results and prepare read requests.
ReadValueIdCollection nodesToRead = new ReadValueIdCollection();
for (int ii = 0; ii < elements.Length; ii++)
{
BrowseElement element = elements[ii];
if (element == null)
{
continue;
}
// update the element with the children found.
if (!UpdateBrowseElement(element, nodesToBrowse, results, indexes[ii]))
{
requests[ii].Error = ResultIds.E_UNKNOWNITEMID;
elements[ii] = null;
continue;
}
// prepare to read the properties from the server.
indexes[ii] = PrepareBrowseElementReadRequest(
element.NodeId,
element.ReferencesByName,
nodesToRead,
NodeClass.Unspecified,
false);
}
// check if nothing to do.
if (nodesToRead.Count == 0)
{
return properties;
}
// read all child properties at once.
DataValueCollection values = Read(session, nodesToRead);
// process results and build final table.
for (int ii = 0; ii < elements.Length; ii++)
{
BrowseElement element = elements[ii];
if (element == null)
{
continue;
}
// update the browse element with the property values.
if (!UpdateBrowseElement(session.TypeTree, element, nodesToRead, values, NodeClass.Unspecified, false, indexes[ii]))
{
requests[ii].Error = ResultIds.E_UNKNOWNITEMID;
continue;
}
UpdateReadPropertyRequest(requests[ii], element, propertyIds);
// save element in cache.
lock (m_lock)
{
element.CacheTimestamp = DateTime.UtcNow;
m_cache[element.ItemId] = element;
}
}
// return the descriptions.
return properties;
}
/// <summary>
/// Sends the browse request to the server.
/// </summary>
/// <param name="session">The session.</param>
/// <param name="nodesToBrowse">The nodes to browse.</param>
/// <returns></returns>
private BrowseResultCollection BrowseBlock(Session session, BrowseDescriptionCollection nodesToBrowse)
{
try
{
// Utils.Trace("Browsing {0} Nodes", nodesToBrowse.Count);
ViewDescription view = new ViewDescription();
Dictionary<int,BrowseResult> combinedResults = new Dictionary<int, BrowseResult>();
// initialize the table of indexes used to correlate results.
BrowseDescriptionCollection browseOperations = nodesToBrowse;
List<int> browseIndexes = new List<int>();
for (int ii = 0; ii < nodesToBrowse.Count; ii++)
{
browseIndexes.Add(ii);
}
BrowseDescriptionCollection unprocessedOperations = new BrowseDescriptionCollection();
List<int> unprocessedBrowseIndexes = new List<int>();
while (browseOperations.Count > 0)
{
// start the browse operation.
BrowseResultCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
session.Browse(
null,
view,
0,
browseOperations,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, browseOperations);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, browseOperations);
unprocessedOperations.Clear();
unprocessedBrowseIndexes.Clear();
ByteStringCollection continuationPoints = new ByteStringCollection();
List<int> continuationPointIndexes = new List<int>();
for (int ii = 0; ii < browseOperations.Count; ii++)
{
int index = browseIndexes[ii];
// Utils.Trace("{0}/{1}/{2}", browseOperations[ii].NodeId, browseOperations[ii].ReferenceTypeId, results[ii].References.Count);
// look up results.
BrowseResult combinedResult = null;
if (!combinedResults.TryGetValue(index, out combinedResult))
{
combinedResults[index] = combinedResult = new BrowseResult();
}
// check for error.
if (StatusCode.IsBad(results[ii].StatusCode))
{
// this error indicates that the server does not have enough simultaneously active
// continuation points. This request will need to be resent after the other operations
// have been completed and their continuation points released.
if (results[ii].StatusCode == StatusCodes.BadNoContinuationPoints)
{
unprocessedOperations.Add(browseOperations[ii]);
unprocessedBrowseIndexes.Add(index);
continue;
}
// save error.
if (StatusCode.IsGood(combinedResult.StatusCode))
{
combinedResult.StatusCode = results[ii].StatusCode;
}
continue;
}
// check if all references have been fetched.
if (results[ii].References.Count == 0)
{
continue;
}
// save results.
combinedResult.References.AddRange(results[ii].References);
// check for continuation point.
if (results[ii].ContinuationPoint != null && results[ii].ContinuationPoint.Length > 0)
{
continuationPoints.Add(results[ii].ContinuationPoint);
continuationPointIndexes.Add(index);
}
}
// process continuation points.
ByteStringCollection revisedContinuationPoints = new ByteStringCollection();
List<int> revisedContinuationPointIndexes = new List<int>();
while (continuationPoints.Count > 0)
{
bool releaseContinuationPoints = false;
// continue browse operation.
session.BrowseNext(
null,
releaseContinuationPoints,
continuationPoints,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, continuationPoints);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, continuationPoints);
revisedContinuationPoints.Clear();
revisedContinuationPointIndexes.Clear();
for (int ii = 0; ii < continuationPoints.Count; ii++)
{
int index = continuationPointIndexes[ii];
// look up results.
BrowseResult combinedResult = null;
if (!combinedResults.TryGetValue(index, out combinedResult))
{
combinedResults[index] = new BrowseResult();
}
// check for error.
if (StatusCode.IsBad(results[ii].StatusCode))
{
// save error.
if (StatusCode.IsGood(combinedResult.StatusCode))
{
combinedResult.StatusCode = results[ii].StatusCode;
}
continue;
}
// check if all references have been fetched.
if (results[ii].References.Count == 0)
{
continue;
}
// save results.
combinedResult.References.AddRange(results[ii].References);
// check for continuation point.
if (results[ii].ContinuationPoint != null && results[ii].ContinuationPoint.Length > 0)
{
revisedContinuationPoints.Add(results[ii].ContinuationPoint);
revisedContinuationPointIndexes.Add(index);
}
}
// check if browsing must continue;
continuationPoints = revisedContinuationPoints;
continuationPointIndexes = revisedContinuationPointIndexes;
}
// check if unprocessed results exist.
browseOperations = unprocessedOperations;
browseIndexes = unprocessedBrowseIndexes;
}
// reconstruct list of combined results.
BrowseResultCollection finalResults = new BrowseResultCollection();
for (int ii = 0; ii < nodesToBrowse.Count; ii++)
{
BrowseResult combinedResult = null;
if (!combinedResults.TryGetValue(ii, out combinedResult))
{
combinedResult = new BrowseResult();
}
finalResults.Add(combinedResult);
}
// return complete list.
return finalResults;
}
catch (Exception e)
{
throw ComUtils.CreateComException(e, ResultIds.E_FAIL);
}
}
/// <summary>
/// Sends the browse request to the server.
/// </summary>
/// <param name="session">The session.</param>
/// <param name="nodesToBrowse">The nodes to browse.</param>
/// <returns></returns>
private BrowseResultCollection Browse(Session session, BrowseDescriptionCollection nodesToBrowse)
{
BrowseResultCollection results = null;
// break the request into smaller blocks.
if (m_browseBlockSize > 0 && nodesToBrowse.Count > m_browseBlockSize)
{
results = new BrowseResultCollection();
for (int ii = 0; ii < nodesToBrowse.Count; ii += m_browseBlockSize)
{
BrowseDescriptionCollection x = new BrowseDescriptionCollection();
for (int jj = ii; jj < ii + m_browseBlockSize && jj < nodesToBrowse.Count; jj++)
{
x.Add(nodesToBrowse[jj]);
}
BrowseResultCollection y = BrowseBlock(session, x);
results.AddRange(y);
}
return results;
}
// small enough to do directly.
return BrowseBlock(session, nodesToBrowse);
}
/// <summary>
/// Updates the browse element with the children returned in the browse results.
/// </summary>
/// <param name="element">The element.</param>
/// <param name="nodesToBrowse">The nodes to browse.</param>
/// <param name="results">The results.</param>
/// <param name="first">The index of the first browse result associated with the element.</param>
/// <returns></returns>
private bool UpdateBrowseElement(
BrowseElement element,
BrowseDescriptionCollection nodesToBrowse,
BrowseResultCollection results,
int first)
{
// check for a valid range within the collection.
if (first < 0 || first >= nodesToBrowse.Count)
{
return false;
}
bool missingReferences = false;
// process all references.
Dictionary<string,ReferenceDescription> referencesByName = new Dictionary<string, ReferenceDescription>();
Dictionary<string,ReferenceDescription> duplicateNames = new Dictionary<string, ReferenceDescription>();
for (int ii = first; ii < first+2; ii++)
{
BrowseResult result = results[ii];
// check for errors - rejected node id are fatal; others can be ignored.
if (StatusCode.IsBad(result.StatusCode))
{
if (result.StatusCode == StatusCodes.BadNodeIdInvalid || result.StatusCode == StatusCodes.BadNodeIdInvalid || result.StatusCode == StatusCodes.BadNodeNotInView)
{
return false;
}
missingReferences = true;
continue;
}
// eliminate duplicates and index references by browse name.
for (int jj = 0; jj < result.References.Count; jj++)
{
ReferenceDescription reference = result.References[jj];
// ignore off server references.
if (reference.NodeId == null || reference.NodeId.IsAbsolute)
{
continue;
}
// construct the browse name.
string browseName = m_mapper.GetLocalBrowseName(reference.BrowseName);
if (reference.DisplayName != null)
{
browseName = reference.DisplayName.Text;
}
// check for duplicates.
ReferenceDescription duplicate = null;
if (referencesByName.TryGetValue(browseName, out duplicate))
{
if (reference.NodeId != duplicate.NodeId)
{
duplicateNames[browseName] = duplicate;
}
continue;
}
// add to table.
referencesByName.Add(browseName, reference);
}
}
// remove duplicates.
foreach (string duplicateName in duplicateNames.Keys)
{
referencesByName.Remove(duplicateName);
}
// save child lookup table.
element.ReferencesByName = referencesByName;
element.MissingReferences = missingReferences;
// update the masks.
SetElementMasks(element);
return true;
}
/// <summary>
/// Prepares a browse request for the children of a node.
/// </summary>
/// <param name="nodeId">The node id.</param>
/// <param name="nodesToBrowse">The nodes to browse.</param>
private int PrepareBrowseElementBrowseRequest(
NodeId nodeId,
BrowseDescriptionCollection nodesToBrowse)
{
int index = nodesToBrowse.Count;
BrowseDescription nodeToBrowse = new BrowseDescription();
nodeToBrowse.NodeId = nodeId;
nodeToBrowse.BrowseDirection = BrowseDirection.Forward;
nodeToBrowse.ReferenceTypeId = Opc.Ua.ReferenceTypeIds.Organizes;
nodeToBrowse.IncludeSubtypes = true;
nodeToBrowse.NodeClassMask = (uint)(NodeClass.Object | NodeClass.Variable);
nodeToBrowse.ResultMask = (uint)(BrowseResultMask.DisplayName | BrowseResultMask.BrowseName | BrowseResultMask.NodeClass);
nodesToBrowse.Add(nodeToBrowse);
nodeToBrowse = new BrowseDescription();
nodeToBrowse.NodeId = nodeId;
nodeToBrowse.BrowseDirection = BrowseDirection.Forward;
nodeToBrowse.ReferenceTypeId = Opc.Ua.ReferenceTypeIds.HasChild;
nodeToBrowse.IncludeSubtypes = true;
nodeToBrowse.NodeClassMask = (uint)(NodeClass.Object | NodeClass.Variable);
nodeToBrowse.ResultMask = (uint)(BrowseResultMask.DisplayName | BrowseResultMask.BrowseName | BrowseResultMask.NodeClass);
nodesToBrowse.Add(nodeToBrowse);
return index;
}
public static void BrowseNode(String currentNode, String browseName)
{
BrowseResultCollection browseResultCollection = null;
DiagnosticInfoCollection diagnosticInfos;
BrowseDescriptionCollection browseDescriptionCollection = null;
List <NodeClass> nodeClasses = new List <NodeClass>()
{
NodeClass.Unspecified
};
foreach (NodeClass nodeClass in nodeClasses)
{
browseDescriptionCollection = PrepareBrowseDescriptionCollection(currentNode, (uint)nodeClass);
clientSession.Browse(
null,
null,
100,
browseDescriptionCollection,
out browseResultCollection,
out diagnosticInfos);
if (browseResultCollection.Where(br => br.References.Count > 0).FirstOrDefault() == null)
{
continue;
}
int browseResultCounter = browseResultCollection.FindIndex(br => br.References.Count > 0);
String referenceType = String.Empty;
foreach (BrowseResult browseResult in browseResultCollection)
{
switch (browseResultCounter)
{
case 0:
referenceType = "Organizes";
break;
case 1:
referenceType = "HasComponent";
break;
case 2:
referenceType = "HasChild";
break;
case 3:
referenceType = "HasDescription";
break;
case 4:
referenceType = "HasProperty";
break;
default:
referenceType = "HasProperty";
break;
}
if (browseResult.References.Count > 0)
{
foreach (ReferenceDescription referenceDescription in browseResult.References)
{
if (referenceDescription.BrowseName.NamespaceIndex != UaDefaultNamespaceIndex)
{
BrowseNode(referenceDescription.NodeId.ToString(), referenceDescription.BrowseName.ToString());
}
//TBD - If a node id has different relations with its parent node, the additional "relation" should be added
//OpcuaNodeList opcuaNodeSubStructure = new OpcuaNodeList();
//opcuaNodeSubStructure.nodeId = referenceDescription.NodeId.ToString();
//opcuaNodeSubStructure.browseName = referenceDescription.BrowseName.ToString();
OpcuaNodeLink opcuaNodeLink = new OpcuaNodeLink();
opcuaNodeLink.nodeID = referenceDescription.NodeId.ToString();
opcuaNodeLink.browseName = referenceDescription.BrowseName.ToString();
opcuaNodeLink.parentNodeId = currentNode;
opcuaNodeLink.parentNodebrowseName = browseName;
opcuaNodeLink.referenceType = referenceType;
if (referenceDescription.IsForward)
{
opcuaNodeLink.BrowseDirection = BrowseDirection.Forward.ToString("G");
}
opcuaNodeLink.NodeClassMask = nodeClass.ToString("G");
opcuaNodeLink.browseResultMask = BrowseResultMask.All.ToString("G");
//if (!opcuaNodeStructure.IsChildPresent(referenceDescription.NodeId.ToString()))
if (opcuaNodeStructure.ChildrenNodes == null)
{
opcuaNodeStructure.ChildrenNodes = new List <OpcuaNodeLink>();
}
addNode(opcuaNodeLink);
if (referenceDescription.NodeClass == NodeClass.Method)
{
Node methodNode = clientSession.ReadNode((NodeId)(referenceDescription.NodeId.ToString()));
browseDescriptionCollection = PrepareBrowseDescriptionCollection(referenceDescription.NodeId.ToString(), (uint)nodeClass);
clientSession.Browse(
null,
null,
100,
browseDescriptionCollection,
out browseResultCollection,
out diagnosticInfos);
if (browseResultCollection.Where(br => br.References.Count > 0).FirstOrDefault() == null)
{
continue;
}
String inputArgumentsNodeId = String.Empty, outputArgumentsNodeId = String.Empty;
foreach (BrowseResult br in browseResultCollection)
{
foreach (ReferenceDescription rd in br.References)
{
OpcuaNodeLink nodeLink = new OpcuaNodeLink();
nodeLink.nodeID = rd.NodeId.ToString();
nodeLink.browseName = rd.BrowseName.ToString();
if (nodeLink.browseName == "InputArguments")
{
inputArgumentsNodeId = nodeLink.nodeID;
}
else if (nodeLink.browseName == "OutputArguments")
{
outputArgumentsNodeId = nodeLink.nodeID;
}
nodeLink.parentNodeId = referenceDescription.NodeId.ToString();
nodeLink.parentNodebrowseName = referenceDescription.BrowseName.ToString();
nodeLink.referenceType = referenceType;
if (rd.IsForward)
{
opcuaNodeLink.BrowseDirection = BrowseDirection.Forward.ToString("G");
}
nodeLink.NodeClassMask = nodeClass.ToString("G");
nodeLink.browseResultMask = BrowseResultMask.All.ToString("G");
//if (!opcuaNodeStructure.IsChildPresent(referenceDescription.NodeId.ToString()))
if (opcuaNodeStructure.ChildrenNodes == null)
{
opcuaNodeStructure.ChildrenNodes = new List <OpcuaNodeLink>();
}
addNode(nodeLink);
}
}
opcuaNodeLink.isMethod = true;
BrowsePathCollection pathsToArgs = new BrowsePathCollection();
BrowsePath pathToInputArgs = new BrowsePath();
pathToInputArgs.StartingNode = methodNode.NodeId;
pathToInputArgs.RelativePath = new RelativePath(ReferenceTypeIds.HasProperty, false, true, new QualifiedName("InputArguments"));
pathsToArgs.Add(pathToInputArgs);
BrowsePath pathToOutputArgs = new BrowsePath();
pathToOutputArgs.StartingNode = methodNode.NodeId;
pathToOutputArgs.RelativePath = new RelativePath(ReferenceTypeIds.HasProperty, false, true, new QualifiedName("OutputArguments"));
pathsToArgs.Add(pathToOutputArgs);
BrowsePathResultCollection results = null;
// Get the nodeId of the input argument
ResponseHeader responseHeader = clientSession.TranslateBrowsePathsToNodeIds(
null,
pathsToArgs,
out results,
out diagnosticInfos
);
ArgumentCollection[] arguments = new ArgumentCollection[2];
for (int i = 0; i < 2; i++)
{
arguments[i] = new ArgumentCollection();
foreach (BrowsePathTarget bptarget in results[i].Targets)
{
DataValueCollection readResults = null;
ReadValueId nodeToRead = new ReadValueId();
nodeToRead.NodeId = (NodeId)bptarget.TargetId;
nodeToRead.AttributeId = Attributes.Value;
ReadValueIdCollection nodesToRead = new ReadValueIdCollection();
nodesToRead.Add(nodeToRead);
DiagnosticInfoCollection readDiagnoistcInfos = null;
clientSession.Read(
null,
0,
TimestampsToReturn.Neither,
nodesToRead,
out readResults,
out readDiagnoistcInfos
);
ExtensionObject[] exts = (ExtensionObject[])readResults[0].Value;
for (int j = 0; j < exts.Length; ++j)
{
ExtensionObject ext = exts[j];
arguments[i].Add((Argument)ext.Body);
OpcuaNodeLink nl = new OpcuaNodeLink();
nl.nodeID = ((Opc.Ua.Argument)ext.Body).BinaryEncodingId.ToString();
nl.browseName = ((Opc.Ua.Argument)ext.Body).Name;
if (((Opc.Ua.Argument)ext.Body).Description.Text.Equals("Input argument"))
{
nl.parentNodeId = inputArgumentsNodeId;
}
else if (((Opc.Ua.Argument)ext.Body).Description.Text.Equals("Output argument"))
{
nl.parentNodeId = outputArgumentsNodeId;
}
nl.parentNodebrowseName = referenceDescription.BrowseName.ToString();
nl.referenceType = referenceType;
if (referenceDescription.IsForward)
{
opcuaNodeLink.BrowseDirection = BrowseDirection.Forward.ToString("G");
}
nl.NodeClassMask = NodeClass.Variable.ToString("G");
nl.browseResultMask = BrowseResultMask.All.ToString("G");
nl.isArgument = true;
//if (!opcuaNodeStructure.IsChildPresent(referenceDescription.NodeId.ToString()))
if (opcuaNodeStructure.ChildrenNodes == null)
{
opcuaNodeStructure.ChildrenNodes = new List <OpcuaNodeLink>();
}
addNode(nl);
}
}
}
}
}
}
}
}
}
/// <summary>
/// Browses the address space and returns the references found.
/// </summary>
/// <param name="session">The session.</param>
/// <param name="nodesToBrowse">The set of browse operations to perform.</param>
/// <param name="throwOnError">if set to <c>true</c> a exception will be thrown on an error.</param>
/// <returns>
/// The references found. Null if an error occurred.
/// </returns>
public static ReferenceDescriptionCollection Browse(Session session, BrowseDescriptionCollection nodesToBrowse, bool throwOnError)
{
return Browse(session, null, nodesToBrowse, throwOnError);
}
/// <summary>
/// Browses the address space and returns the references found.
/// </summary>
public static ReferenceDescriptionCollection Browse(Session session, ViewDescription view, BrowseDescription nodeToBrowse, bool throwOnError)
{
try
{
ReferenceDescriptionCollection references = new ReferenceDescriptionCollection();
// construct browse request.
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
nodesToBrowse.Add(nodeToBrowse);
// start the browse operation.
BrowseResultCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
session.Browse(
null,
view,
0,
nodesToBrowse,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, nodesToBrowse);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToBrowse);
do
{
// check for error.
if (StatusCode.IsBad(results[0].StatusCode))
{
throw new ServiceResultException(results[0].StatusCode);
}
// process results.
for (int ii = 0; ii < results[0].References.Count; ii++)
{
references.Add(results[0].References[ii]);
}
// check if all references have been fetched.
if (results[0].References.Count == 0 || results[0].ContinuationPoint == null)
{
break;
}
// continue browse operation.
ByteStringCollection continuationPoints = new ByteStringCollection();
continuationPoints.Add(results[0].ContinuationPoint);
session.BrowseNext(
null,
false,
continuationPoints,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, continuationPoints);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, continuationPoints);
}
while (true);
//return complete list.
return references;
}
catch (Exception exception)
{
if (throwOnError)
{
throw new ServiceResultException(exception, StatusCodes.BadUnexpectedError);
}
return null;
}
}
/// <summary>
/// Creates the browse element.
/// </summary>
/// <param name="session">The session.</param>
/// <param name="nodeId">The node id.</param>
/// <returns>The browse element; null if the node id does not refers to a valid element.</returns>
private BrowseElement CreateBrowseElement(Session session, NodeId nodeId)
{
TraceState("CreateBrowseElement", nodeId);
BrowseElement element = new BrowseElement();
element.NodeId = nodeId;
element.ItemId = m_mapper.GetLocalItemId(nodeId);
// browse the server for the children.
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
int index = PrepareBrowseElementBrowseRequest(nodeId, nodesToBrowse);
// browse all elements at once.
BrowseResultCollection results = Browse(session, nodesToBrowse);
// update the element with the children found.
if (!UpdateBrowseElement(element, nodesToBrowse, results, index))
{
return null;
}
// read the properties from the server.
ReadValueIdCollection nodesToRead = new ReadValueIdCollection();
index = PrepareBrowseElementReadRequest(nodeId, element.ReferencesByName, nodesToRead, NodeClass.Unspecified, true);
DataValueCollection values = Read(session, nodesToRead);
// update the browse element with the property values.
if (!UpdateBrowseElement(session.TypeTree, element, nodesToRead, values, NodeClass.Unspecified, true, index))
{
return null;
}
return element;
}
/// <summary>
/// Invokes the Browse service.
/// </summary>
/// <param name="requestHeader">The request header.</param>
/// <param name="view">The view.</param>
/// <param name="requestedMaxReferencesPerNode">The maximum number of references to return for each node.</param>
/// <param name="nodesToBrowse">The list of nodes to browse.</param>
/// <param name="results">The list of results for the passed starting nodes and filters.</param>
/// <param name="diagnosticInfos">The diagnostic information for the results.</param>
/// <returns>
/// Returns a <see cref="ResponseHeader"/> object
/// </returns>
public override ResponseHeader Browse(
RequestHeader requestHeader,
ViewDescription view,
uint requestedMaxReferencesPerNode,
BrowseDescriptionCollection nodesToBrowse,
out BrowseResultCollection results,
out DiagnosticInfoCollection diagnosticInfos)
{
results = null;
diagnosticInfos = null;
OperationContext context = ValidateRequest(requestHeader, RequestType.Browse);
try
{
if (nodesToBrowse == null || nodesToBrowse.Count == 0)
{
throw new ServiceResultException(StatusCodes.BadNothingToDo);
}
m_serverInternal.NodeManager.Browse(
context,
view,
requestedMaxReferencesPerNode,
nodesToBrowse,
out results,
out diagnosticInfos);
return CreateResponse(requestHeader, context.StringTable);
}
catch (ServiceResultException e)
{
lock (ServerInternal.DiagnosticsLock)
{
ServerInternal.ServerDiagnostics.RejectedRequestsCount++;
if (IsSecurityError(e.StatusCode))
{
ServerInternal.ServerDiagnostics.SecurityRejectedRequestsCount++;
}
}
throw TranslateException(context, e);
}
finally
{
OnRequestComplete(context);
}
}
/// <summary>
/// Creates the children of the browse element.
/// </summary>
/// <param name="session">The session.</param>
/// <param name="parent">The parent.</param>
/// <returns>
/// The browse element; null if the node id does not refers to a valid element.
/// </returns>
private List<BrowseElement> LookupChildElements(Session session, BrowseElement parent)
{
List<BrowseElement> children = new List<BrowseElement>();
List<BrowseElement> childrenToFind = new List<BrowseElement>();
List<int> indexes = new List<int>();
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
// create an element for each child reference.
foreach (ReferenceDescription reference in parent.ReferencesByName.Values)
{
NodeId nodeId = (NodeId)reference.NodeId;
string itemId = m_mapper.GetLocalItemId(nodeId);
BrowseElement child = null;
lock (m_lock)
{
// check if child has already been cached.
if (m_cache.TryGetValue(itemId, out child))
{
child.ParentId = parent.ItemId;
children.Add(child);
continue;
}
// create a new element.
child = new BrowseElement();
}
child.NodeId = nodeId;
child.ItemId = itemId;
child.NodeClass = reference.NodeClass;
child.BrowseName = child.UaBrowseName = m_mapper.GetLocalBrowseName(reference.BrowseName);
if (reference.DisplayName != null)
{
child.BrowseName = reference.DisplayName.Text;
}
int index = PrepareBrowseElementBrowseRequest(child.NodeId, nodesToBrowse);
childrenToFind.Add(child);
indexes.Add(index);
}
// check if nothing to do because everything was in the cache.
if (childrenToFind.Count == 0)
{
return children;
}
// browse all elements at once.
BrowseResultCollection results = Browse(session, nodesToBrowse);
// validate results and prepare read requests.
ReadValueIdCollection nodesToRead = new ReadValueIdCollection();
for (int ii = 0; ii < childrenToFind.Count; ii++)
{
BrowseElement child = childrenToFind[ii];
// update the element with the children found.
if (!UpdateBrowseElement(child, nodesToBrowse, results, indexes[ii]))
{
children[ii] = null;
continue;
}
// all done with objects.
if (child.NodeClass == NodeClass.Object)
{
child.ParentId = parent.ItemId;
children.Add(child);
lock (m_lock)
{
child.CacheTimestamp = DateTime.UtcNow;
m_cache[child.ItemId] = child;
}
}
// prepare to read the properties from the server.
indexes[ii] = PrepareBrowseElementReadRequest(child.NodeId, child.ReferencesByName, nodesToRead, child.NodeClass, true);
}
// check if nothing to do because only objects with no properties..
if (nodesToRead.Count == 0)
{
return children;
}
// read all child properties at once.
DataValueCollection values = Read(session, nodesToRead);
// process results and build final table.
for (int ii = 0; ii < childrenToFind.Count; ii++)
{
BrowseElement child = childrenToFind[ii];
if (child == null || child.NodeClass == NodeClass.Object)
{
continue;
}
// update the browse element with the property values.
if (!UpdateBrowseElement(session.TypeTree, child, nodesToRead, values, child.NodeClass, true, indexes[ii]))
{
continue;
}
// add variables to the cache.
child.ParentId = parent.ItemId;
children.Add(child);
lock (m_lock)
{
child.CacheTimestamp = DateTime.UtcNow;
m_cache[child.ItemId] = child;
}
}
return children;
}
/// <summary>
/// Browses the address space and returns the references found.
/// </summary>
public static ReferenceDescriptionCollection Browse(Session session, ViewDescription view, BrowseDescription nodeToBrowse, bool throwOnError)
{
try
{
ReferenceDescriptionCollection references = new ReferenceDescriptionCollection( );
// construct browse request.
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection( );
nodesToBrowse.Add(nodeToBrowse);
// start the browse operation.
BrowseResultCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
session.Browse(
null,
view,
0,
nodesToBrowse,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, nodesToBrowse);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToBrowse);
do
{
// check for error.
if (StatusCode.IsBad(results[0].StatusCode))
{
throw new ServiceResultException(results[0].StatusCode);
}
// process results.
for (int ii = 0; ii < results[0].References.Count; ii++)
{
references.Add(results[0].References[ii]);
}
// check if all references have been fetched.
if (results[0].References.Count == 0 || results[0].ContinuationPoint == null)
{
break;
}
// continue browse operation.
ByteStringCollection continuationPoints = new ByteStringCollection( );
continuationPoints.Add(results[0].ContinuationPoint);
session.BrowseNext(
null,
false,
continuationPoints,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, continuationPoints);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, continuationPoints);
}while (true);
//return complete list.
return(references);
}
catch (Exception exception)
{
if (throwOnError)
{
throw new ServiceResultException(exception, StatusCodes.BadUnexpectedError);
}
return(null);
}
}
/// <summary>
/// Handles the BeforeExpand event of the BrowseTV control.
/// </summary>
private void BrowseTV_BeforeExpand(object sender, TreeViewCancelEventArgs e)
{
try
{
ReferenceDescription reference = (ReferenceDescription)e.Node.Tag;
e.Node.Nodes.Clear();
// build list of references to browse.
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
for (int ii = 0; ii < m_referenceTypeIds.Length; ii++)
{
BrowseDescription nodeToBrowse = new BrowseDescription();
nodeToBrowse.NodeId = m_rootId;
nodeToBrowse.BrowseDirection = BrowseDirection.Forward;
nodeToBrowse.ReferenceTypeId = m_referenceTypeIds[ii];
nodeToBrowse.IncludeSubtypes = true;
nodeToBrowse.NodeClassMask = 0;
nodeToBrowse.ResultMask = (uint)BrowseResultMask.All;
if (reference != null)
{
nodeToBrowse.NodeId = (NodeId)reference.NodeId;
}
nodesToBrowse.Add(nodeToBrowse);
}
// add the childen to the control.
ReferenceDescriptionCollection references = ClientUtils.Browse(m_session, View, nodesToBrowse, false);
for (int ii = 0; references != null && ii < references.Count; ii++)
{
reference = references[ii];
// ignore out of server references.
if (reference.NodeId.IsAbsolute)
{
continue;
}
TreeNode child = new TreeNode(reference.ToString());
child.Nodes.Add(new TreeNode());
child.Tag = reference;
e.Node.Nodes.Add(child);
}
}
catch (Exception exception)
{
ClientUtils.HandleException(this.Text, exception);
}
}
private void PopulateBranch(NodeId sourceId, TreeNodeCollection nodes)
{
try
{
nodes.Clear();
// find all of the components of the node.
BrowseDescription nodeToBrowse1 = new BrowseDescription();
nodeToBrowse1.NodeId = sourceId;
nodeToBrowse1.BrowseDirection = BrowseDirection.Forward;
nodeToBrowse1.ReferenceTypeId = ReferenceTypeIds.Aggregates;
nodeToBrowse1.IncludeSubtypes = true;
nodeToBrowse1.NodeClassMask = (uint)(NodeClass.Object | NodeClass.Variable);
nodeToBrowse1.ResultMask = (uint)BrowseResultMask.All;
// find all nodes organized by the node.
BrowseDescription nodeToBrowse2 = new BrowseDescription();
nodeToBrowse2.NodeId = sourceId;
nodeToBrowse2.BrowseDirection = BrowseDirection.Forward;
nodeToBrowse2.ReferenceTypeId = ReferenceTypeIds.Organizes;
nodeToBrowse2.IncludeSubtypes = true;
nodeToBrowse2.NodeClassMask = (uint)(NodeClass.Object | NodeClass.Variable);
nodeToBrowse2.ResultMask = (uint)BrowseResultMask.All;
//find all type orgranized by the node.
BrowseDescription nodetoBrowse3 = new BrowseDescription();
nodetoBrowse3.NodeId = sourceId;
nodetoBrowse3.BrowseDirection = BrowseDirection.Forward;
nodetoBrowse3.ReferenceTypeId = ReferenceTypeIds.References;
nodetoBrowse3.IncludeSubtypes = true;
nodetoBrowse3.NodeClassMask = (uint)(NodeClass.ReferenceType | NodeClass.ObjectType | NodeClass.DataType | NodeClass.VariableType);
nodetoBrowse3.ResultMask = (uint)BrowseResultMask.All;
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
nodesToBrowse.Add(nodeToBrowse1);
nodesToBrowse.Add(nodeToBrowse2);
nodesToBrowse.Add(nodetoBrowse3);
// fetch references from the server.
ReferenceDescriptionCollection references = Browse(m_server, nodesToBrowse, false);
// process results.
for (int ii = 0; ii < references.Count; ii++)
{
ReferenceDescription target = references[ii];
// add node.
TreeNode child = new TreeNode(Utils.Format("{0}", target));
child.Tag = target;
child.Nodes.Add(new TreeNode());
nodes.Add(child);
}
// update the attributes display.
DisplayAttributes(sourceId);
}
catch (Exception exception)
{
ServerUtils.HandleException(this.Text, exception);
}
}
private void ReadNode(NodeId nodeid, bool ignoreroot, bool ignorechildren, String DriverName)
{
INode node = m_session.NodeCache.Find(nodeid);
if (node != null)
{
//TreeNode root = new TreeNode(node.ToString());
//root.ImageIndex = ClientUtils.GetImageIndex(m_session, node.NodeClass, node.TypeDefinitionId, false);
//root.SelectedImageIndex = ClientUtils.GetImageIndex(m_session, node.NodeClass, node.TypeDefinitionId, true);
ReferenceDescription reference = new ReferenceDescription();
reference.NodeId = node.NodeId;
reference.NodeClass = node.NodeClass;
reference.BrowseName = node.BrowseName;
reference.DisplayName = node.DisplayName;
reference.TypeDefinition = node.TypeDefinitionId;
// build list of attributes to read.
ReadValueIdCollection nodesToRead = new ReadValueIdCollection();
foreach (uint attributeId in Attributes.GetIdentifiers())
{
ReadValueId nodeToRead = new ReadValueId();
nodeToRead.NodeId = (NodeId)reference.NodeId;
nodeToRead.AttributeId = attributeId;
nodesToRead.Add(nodeToRead);
}
// read the attributes.
DataValueCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
m_session.Read(
null,
0,
TimestampsToReturn.Neither,
nodesToRead,
out results,
out diagnosticInfos);
if (ignoreroot == false)
{
//Log(results[0].ToString() + " \t| " + results[3].ToString() + " \t| "+ results[4].ToString() + " \t| " + results[12].ToString());
Log("UID:" + S80(results[(int)Attributes.NodeId - 1].ToString()) + " \tBrowseName: " + s40(results[(int)Attributes.BrowseName - 1].ToString()) + " \tDisplayName: " + s40(results[(int)Attributes.DisplayName - 1].ToString()) + " \tDescription: " + S80(results[(int)Attributes.Description - 1].ToString()) + " \tValue: " + results[(int)Attributes.Value - 1].ToString());
dr = dt.NewRow();
dr["UID"] = results[(int)Attributes.NodeId - 1].ToString();
dr["BrowseName"] = results[(int)Attributes.BrowseName - 1].ToString();
dr["DisplayName"] = results[(int)Attributes.DisplayName - 1].ToString();
dr["Description"] = results[(int)Attributes.Description - 1].ToString();
dr["Value"] = results[(int)Attributes.Value - 1].ToString();
dr["Name"] = DriverName;
dt.Rows.Add(dr);
if (results[(int)Attributes.AccessLevel - 1].Value != null)
{
if (((byte)(results[(int)Attributes.AccessLevel - 1].GetValue(typeof(byte))) & AccessLevels.HistoryRead) == AccessLevels.HistoryRead)
{
//gv.DataSource = dt;
ReadHistory(DateTime.Now.AddDays(-1), DateTime.Now, new NodeId(results[0].ToString()), 25, "");
}
}
}
if (ignorechildren == false)
{
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
BrowseDescription nodeToBrowse = new BrowseDescription();
nodeToBrowse.NodeId = nodeid;
nodeToBrowse.BrowseDirection = BrowseDirection.Forward;
nodeToBrowse.ReferenceTypeId = Opc.Ua.ReferenceTypeIds.HierarchicalReferences;
nodeToBrowse.IncludeSubtypes = true;
nodeToBrowse.NodeClassMask = 0;
nodeToBrowse.ResultMask = (uint)BrowseResultMask.All;
if (reference != null)
{
nodeToBrowse.NodeId = (NodeId)reference.NodeId;
}
nodesToBrowse.Add(nodeToBrowse);
ReferenceDescriptionCollection references = ClientUtils.Browse(m_session, null, nodesToBrowse, false);
for (int ii = 0; references != null && ii < references.Count; ii++)
{
reference = references[ii];
// build list of attributes to read.
nodesToRead = new ReadValueIdCollection();
foreach (uint attributeId in Attributes.GetIdentifiers())
{
ReadValueId nodeToRead = new ReadValueId();
nodeToRead.NodeId = (NodeId)reference.NodeId;
nodeToRead.AttributeId = attributeId;
nodesToRead.Add(nodeToRead);
}
// read the attributes.
results = null;
diagnosticInfos = null;
m_session.Read(
null,
0,
TimestampsToReturn.Neither,
nodesToRead,
out results,
out diagnosticInfos);
// Log("UID:"+results[0].ToString() + " \tBrowseName: " + results[(int)Attributes.BrowseName].ToString() + " \tDisplayName: " + results[(int)Attributes.DisplayName].ToString() + " \tDescription: " + results[(int)Attributes.Description].ToString() + " \t| " + results[(int)Attributes.Value].ToString());
//Log("UID:" + S80(results[(int)Attributes.NodeId - 1].ToString()) + " \tBrowseName: " + results[(int)Attributes.BrowseName - 1].ToString() + " \tDisplayName: " + results[(int)Attributes.DisplayName - 1].ToString() + " \tDescription: " + results[(int)Attributes.Description - 1].ToString() + " \tValue: " + results[(int)Attributes.Value - 1].ToString());
Log("UID:" + S80(results[(int)Attributes.NodeId - 1].ToString()) + " \tBrowseName: " + s40(results[(int)Attributes.BrowseName - 1].ToString()) + " \tDisplayName: " + s40(results[(int)Attributes.DisplayName - 1].ToString()) + " \tDescription: " + S80(results[(int)Attributes.Description - 1].ToString()) + " \tValue: " + results[(int)Attributes.Value - 1].ToString());
dr = dt.NewRow();
dr["UID"] = results[(int)Attributes.NodeId - 1].ToString();
dr["BrowseName"] = results[(int)Attributes.BrowseName - 1].ToString();
dr["DisplayName"] = results[(int)Attributes.DisplayName - 1].ToString();
dr["Description"] = results[(int)Attributes.Description - 1].ToString();
dr["Value"] = results[(int)Attributes.Value - 1].ToString();
dt.Rows.Add(dr);
try
{
if (results[(int)Attributes.AccessLevel - 1].Value != null)
{
if (((byte)(results[(int)Attributes.AccessLevel - 1].GetValue(typeof(byte))) & AccessLevels.HistoryRead) == AccessLevels.HistoryRead)
{
//gv.DataSource = dt;
ReadHistory(DateTime.Today, DateTime.Now, new NodeId(results[0].ToString()), 25, "");
}
}
else
{
if (results[(int)Attributes.Value - 1].Value == null)
{
// gv.DataSource = dt;
ReadNode(new NodeId(results[(int)Attributes.NodeId - 1].ToString()), true, false, "");
}
}
}
catch
{
Log("V=" + results[17].ToString());
}
}
}
}
}
/// <summary>
/// Handles the BeforeExpand event of the BrowseTV control.
/// </summary>
private void BrowseTV_BeforeExpand(object sender, TreeViewCancelEventArgs e)
{
try
{
ReferenceDescription reference = (ReferenceDescription)e.Node.Tag;
e.Node.Nodes.Clear();
// build list of references to browse.
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
for (int ii = 0; ii < m_referenceTypeIds.Length; ii++)
{
BrowseDescription nodeToBrowse = new BrowseDescription();
nodeToBrowse.NodeId = m_rootId;
nodeToBrowse.BrowseDirection = BrowseDirection.Forward;
nodeToBrowse.ReferenceTypeId = m_referenceTypeIds[ii];
nodeToBrowse.IncludeSubtypes = true;
nodeToBrowse.NodeClassMask = 0;
nodeToBrowse.ResultMask = (uint)BrowseResultMask.All;
if (reference != null)
{
nodeToBrowse.NodeId = (NodeId)reference.NodeId;
}
nodesToBrowse.Add(nodeToBrowse);
}
// add the childen to the control.
SortedDictionary<ExpandedNodeId, TreeNode> dictionary = new SortedDictionary<ExpandedNodeId, TreeNode>();
ReferenceDescriptionCollection references = ClientUtils.Browse(m_session, View, nodesToBrowse, false);
for (int ii = 0; references != null && ii < references.Count; ii++)
{
reference = references[ii];
// ignore out of server references.
if (reference.NodeId.IsAbsolute)
{
continue;
}
if (dictionary.ContainsKey(reference.NodeId))
{
continue;
}
TreeNode child = new TreeNode(reference.ToString());
child.Nodes.Add(new TreeNode());
child.Tag = reference;
if (!reference.TypeDefinition.IsAbsolute)
{
try
{
if (!m_typeImageMapping.ContainsKey((NodeId)reference.TypeDefinition))
{
List<NodeId> nodeIds = ClientUtils.TranslateBrowsePaths(m_session, (NodeId)reference.TypeDefinition, m_session.NamespaceUris, Opc.Ua.BrowseNames.Icon);
if (nodeIds.Count > 0 && nodeIds[0] != null)
{
DataValue value = m_session.ReadValue(nodeIds[0]);
byte[] bytes = value.Value as byte[];
if (bytes != null)
{
System.IO.MemoryStream istrm = new System.IO.MemoryStream(bytes);
Image icon = Image.FromStream(istrm);
BrowseTV.ImageList.Images.Add(icon);
m_typeImageMapping[(NodeId)reference.TypeDefinition] = BrowseTV.ImageList.Images.Count - 1;
}
}
}
}
catch (Exception exception)
{
Utils.Trace(exception, "Error loading image.");
}
}
int index = 0;
if (!m_typeImageMapping.TryGetValue((NodeId)reference.TypeDefinition, out index))
{
child.ImageIndex = ClientUtils.GetImageIndex(m_session, reference.NodeClass, reference.TypeDefinition, false);
child.SelectedImageIndex = ClientUtils.GetImageIndex(m_session, reference.NodeClass, reference.TypeDefinition, true);
}
else
{
child.ImageIndex = index;
child.SelectedImageIndex = index;
}
dictionary[reference.NodeId] = child;
}
// add nodes to tree.
foreach (TreeNode node in dictionary.Values.OrderBy(i => i.Text))
{
e.Node.Nodes.Add(node);
}
}
catch (Exception exception)
{
ClientUtils.HandleException(this.Text, exception);
}
}
/// <summary>
/// Browses the children of the node and updates the tree.
/// </summary>
private bool BrowseChildren(TreeNode parent)
{
ReferenceDescription reference = parent.Tag as ReferenceDescription;
if (reference == null)
{
return(false);
}
parent.Nodes.Clear();
if (reference.NodeId.IsAbsolute)
{
return(false);
}
BrowseDescription nodeToBrowse = new BrowseDescription();
nodeToBrowse.NodeId = (NodeId)reference.NodeId;
nodeToBrowse.BrowseDirection = m_browseDirection;
nodeToBrowse.ReferenceTypeId = m_referenceTypeId;
nodeToBrowse.IncludeSubtypes = true;
nodeToBrowse.NodeClassMask = 0;
nodeToBrowse.ResultMask = (uint)(int)BrowseResultMask.All;
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
nodesToBrowse.Add(nodeToBrowse);
ViewDescription view = null;
if (NodeId.IsNull(m_viewId))
{
view = new ViewDescription();
view.ViewId = m_viewId;
view.Timestamp = DateTime.MinValue;
view.ViewVersion = 0;
}
BrowseResultCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
m_session.Browse(
null,
view,
0,
nodesToBrowse,
out results,
out diagnosticInfos);
if (results.Count != 1 || StatusCode.IsBad(results[0].StatusCode))
{
return(false);
}
UpdateNode(parent, results[0].References);
while (results[0].ContinuationPoint != null && results[0].ContinuationPoint.Length > 0)
{
ByteStringCollection continuationPoints = new ByteStringCollection();
continuationPoints.Add(results[0].ContinuationPoint);
m_session.BrowseNext(
null,
parent == null,
continuationPoints,
out results,
out diagnosticInfos);
if (results.Count != 1 || StatusCode.IsBad(results[0].StatusCode))
{
return(false);
}
UpdateNode(parent, results[0].References);
}
return(true);
}
/// <summary>
/// Reads the properties for the node.
/// </summary>
private void ReadProperties(NodeId nodeId)
{
// build list of references to browse.
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
BrowseDescription nodeToBrowse = new BrowseDescription();
nodeToBrowse.NodeId = nodeId;
nodeToBrowse.BrowseDirection = BrowseDirection.Forward;
nodeToBrowse.ReferenceTypeId = Opc.Ua.ReferenceTypeIds.HasProperty;
nodeToBrowse.IncludeSubtypes = true;
nodeToBrowse.NodeClassMask = (uint)NodeClass.Variable;
nodeToBrowse.ResultMask = (uint)BrowseResultMask.All;
nodesToBrowse.Add(nodeToBrowse);
// find properties.
ReferenceDescriptionCollection references = ClientUtils.Browse(m_session, View, nodesToBrowse, false);
// build list of properties to read.
ReadValueIdCollection nodesToRead = new ReadValueIdCollection();
for (int ii = 0; references != null && ii < references.Count; ii++)
{
ReferenceDescription reference = references[ii];
// ignore out of server references.
if (reference.NodeId.IsAbsolute)
{
continue;
}
ReadValueId nodeToRead = new ReadValueId();
nodeToRead.NodeId = (NodeId)reference.NodeId;
nodeToRead.AttributeId = Attributes.Value;
nodeToRead.Handle = reference;
nodesToRead.Add(nodeToRead);
}
if (nodesToRead.Count == 0)
{
return;
}
// read the properties.
DataValueCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
m_session.Read(
null,
0,
TimestampsToReturn.Neither,
nodesToRead,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, nodesToRead);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToRead);
// add the results to the display.
for (int ii = 0; ii < results.Count; ii++)
{
ReferenceDescription reference = (ReferenceDescription)nodesToRead[ii].Handle;
TypeInfo typeInfo = TypeInfo.Construct(results[ii].Value);
// add the metadata for the attribute.
ListViewItem item = new ListViewItem(reference.ToString());
item.SubItems.Add(typeInfo.BuiltInType.ToString());
if (typeInfo.ValueRank >= 0)
{
item.SubItems[1].Text += "[]";
}
// add the value.
if (StatusCode.IsBad(results[ii].StatusCode))
{
item.SubItems.Add(results[ii].StatusCode.ToString());
}
else
{
item.SubItems.Add(results[ii].WrappedValue.ToString());
}
item.Tag = new AttributeInfo() { NodeToRead = nodesToRead[ii], Value = results[ii] };
item.ImageIndex = ClientUtils.GetImageIndex(m_session, NodeClass.Variable, Opc.Ua.VariableTypeIds.PropertyType, false);
// display in list.
AttributesLV.Items.Add(item);
}
}
/// <summary>
/// Invokes the Browse service.
/// </summary>
public virtual ResponseHeader Browse(
RequestHeader requestHeader,
ViewDescription view,
uint requestedMaxReferencesPerNode,
BrowseDescriptionCollection nodesToBrowse,
out BrowseResultCollection results,
out DiagnosticInfoCollection diagnosticInfos)
{
BrowseRequest request = new BrowseRequest();
BrowseResponse response = null;
request.RequestHeader = requestHeader;
request.View = view;
request.RequestedMaxReferencesPerNode = requestedMaxReferencesPerNode;
request.NodesToBrowse = nodesToBrowse;
UpdateRequestHeader(request, requestHeader == null, "Browse");
try
{
if (UseTransportChannel)
{
IServiceResponse genericResponse = TransportChannel.SendRequest(request);
if (genericResponse == null)
{
throw new ServiceResultException(StatusCodes.BadUnknownResponse);
}
ValidateResponse(genericResponse.ResponseHeader);
response = (BrowseResponse)genericResponse;
}
else
{
BrowseResponseMessage responseMessage = InnerChannel.Browse(new BrowseMessage(request));
if (responseMessage == null || responseMessage.BrowseResponse == null)
{
throw new ServiceResultException(StatusCodes.BadUnknownResponse);
}
response = responseMessage.BrowseResponse;
ValidateResponse(response.ResponseHeader);
}
results = response.Results;
diagnosticInfos = response.DiagnosticInfos;
}
finally
{
RequestCompleted(request, response, "Browse");
}
return response.ResponseHeader;
}
/// <summary>
/// Begins an asynchronous invocation of the Browse service.
/// </summary>
/// <param name="requestHeader">The request header.</param>
/// <param name="view">The view to browse.</param>
/// <param name="nodeToBrowse">The node to browse.</param>
/// <param name="maxResultsToReturn">The maximum number of returned values..</param>
/// <param name="browseDirection">The browse direction.</param>
/// <param name="referenceTypeId">The reference type id.</param>
/// <param name="includeSubtypes">If set to <c>true</c> the subtypes of the ReferenceType will be included in the browse.</param>
/// <param name="nodeClassMask">The node class mask.</param>
/// <param name="callback">The callback.</param>
/// <param name="asyncState"></param>
/// <returns></returns>
public IAsyncResult BeginBrowse(
RequestHeader requestHeader,
ViewDescription view,
NodeId nodeToBrowse,
uint maxResultsToReturn,
BrowseDirection browseDirection,
NodeId referenceTypeId,
bool includeSubtypes,
uint nodeClassMask,
AsyncCallback callback,
object asyncState)
{
BrowseDescription description = new BrowseDescription();
description.NodeId = nodeToBrowse;
description.BrowseDirection = browseDirection;
description.ReferenceTypeId = referenceTypeId;
description.IncludeSubtypes = includeSubtypes;
description.NodeClassMask = nodeClassMask;
description.ResultMask = (uint)BrowseResultMask.All;
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
nodesToBrowse.Add(description);
return BeginBrowse(
requestHeader,
view,
maxResultsToReturn,
nodesToBrowse,
callback,
asyncState);
}
/// <summary>
/// Begins an asynchronous invocation of the Browse service.
/// </summary>
public IAsyncResult BeginBrowse(
RequestHeader requestHeader,
ViewDescription view,
uint requestedMaxReferencesPerNode,
BrowseDescriptionCollection nodesToBrowse,
AsyncCallback callback,
object asyncState)
{
BrowseRequest request = new BrowseRequest();
request.RequestHeader = requestHeader;
request.View = view;
request.RequestedMaxReferencesPerNode = requestedMaxReferencesPerNode;
request.NodesToBrowse = nodesToBrowse;
UpdateRequestHeader(request, requestHeader == null, "Browse");
if (UseTransportChannel)
{
return TransportChannel.BeginSendRequest(request, callback, asyncState);
}
return InnerChannel.BeginBrowse(new BrowseMessage(request), callback, asyncState);
}
/// <summary>
/// Browses the specified node.
/// </summary>
public ReferenceDescriptionCollection Browse(NodeId nodeId)
{
if (m_session == null)
{
throw new ServiceResultException(StatusCodes.BadServerNotConnected, "Cannot browse if not connected to a server.");
}
try
{
m_browseInProgress = true;
// construct request.
BrowseDescription nodeToBrowse = new BrowseDescription();
nodeToBrowse.NodeId = nodeId;
nodeToBrowse.BrowseDirection = m_browseDirection;
nodeToBrowse.ReferenceTypeId = m_referenceTypeId;
nodeToBrowse.IncludeSubtypes = m_includeSubtypes;
nodeToBrowse.NodeClassMask = m_nodeClassMask;
nodeToBrowse.ResultMask = m_resultMask;
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
nodesToBrowse.Add(nodeToBrowse);
// make the call to the server.
BrowseResultCollection results;
DiagnosticInfoCollection diagnosticInfos;
ResponseHeader responseHeader = m_session.Browse(
null,
m_view,
m_maxReferencesReturned,
nodesToBrowse,
out results,
out diagnosticInfos);
// ensure that the server returned valid results.
Session.ValidateResponse(results, nodesToBrowse);
Session.ValidateDiagnosticInfos(diagnosticInfos, nodesToBrowse);
// check if valid.
if (StatusCode.IsBad(results[0].StatusCode))
{
throw ServiceResultException.Create(results[0].StatusCode, 0, diagnosticInfos, responseHeader.StringTable);
}
// fetch initial set of references.
byte[] continuationPoint = results[0].ContinuationPoint;
ReferenceDescriptionCollection references = results[0].References;
// process any continuation point.
while (continuationPoint != null)
{
ReferenceDescriptionCollection additionalReferences;
if (!m_continueUntilDone && m_MoreReferences != null)
{
BrowserEventArgs args = new BrowserEventArgs(references);
m_MoreReferences(this, args);
// cancel browser and return the references fetched so far.
if (args.Cancel)
{
BrowseNext(ref continuationPoint, true);
return references;
}
m_continueUntilDone = args.ContinueUntilDone;
}
additionalReferences = BrowseNext(ref continuationPoint, false);
references.AddRange(additionalReferences);
}
// return the results.
return references;
}
finally
{
m_browseInProgress = false;
}
}
/// <summary>
/// Fetches the references for the node.
/// </summary>
private List<ReferenceDescription> Browse(Session session, NodeId nodeId)
{
List<ReferenceDescription> references = new List<ReferenceDescription>();
// specify the references to follow and the fields to return.
BrowseDescription nodeToBrowse = new BrowseDescription();
nodeToBrowse.NodeId = nodeId;
nodeToBrowse.ReferenceTypeId = ReferenceTypeIds.References;
nodeToBrowse.IncludeSubtypes = true;
nodeToBrowse.BrowseDirection = BrowseDirection.Both;
nodeToBrowse.NodeClassMask = 0;
nodeToBrowse.ResultMask = (uint)BrowseResultMask.All;
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
nodesToBrowse.Add(nodeToBrowse);
// start the browse operation.
BrowseResultCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
ResponseHeader responseHeader = session.Browse(
null,
null,
2,
nodesToBrowse,
out results,
out diagnosticInfos);
// these do sanity checks on the result - make sure response matched the request.
ClientBase.ValidateResponse(results, nodesToBrowse);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToBrowse);
// check status.
if (StatusCode.IsBad(results[0].StatusCode))
{
// embed the diagnostic information in a exception.
throw ServiceResultException.Create(results[0].StatusCode, 0, diagnosticInfos, responseHeader.StringTable);
}
// add first batch.
references.AddRange(results[0].References);
// check if server limited the results.
while (results[0].ContinuationPoint != null && results[0].ContinuationPoint.Length > 0)
{
ByteStringCollection continuationPoints = new ByteStringCollection();
continuationPoints.Add(results[0].ContinuationPoint);
// continue browse operation.
responseHeader = session.BrowseNext(
null,
false,
continuationPoints,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, continuationPoints);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, continuationPoints);
// check status.
if (StatusCode.IsBad(results[0].StatusCode))
{
// embed the diagnostic information in a exception.
throw ServiceResultException.Create(results[0].StatusCode, 0, diagnosticInfos, responseHeader.StringTable);
}
// add next batch.
references.AddRange(results[0].References);
}
return references;
}
/// <summary>
/// Browses the address space and returns the references found.
/// </summary>
public static ReferenceDescriptionCollection Browse(Session session, ViewDescription view, BrowseDescriptionCollection nodesToBrowse, bool throwOnError)
{
try
{
ReferenceDescriptionCollection references = new ReferenceDescriptionCollection();
BrowseDescriptionCollection unprocessedOperations = new BrowseDescriptionCollection();
while (nodesToBrowse.Count > 0)
{
// start the browse operation.
BrowseResultCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
session.Browse(
null,
view,
0,
nodesToBrowse,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, nodesToBrowse);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToBrowse);
ByteStringCollection continuationPoints = new ByteStringCollection();
for (int ii = 0; ii < nodesToBrowse.Count; ii++)
{
// check for error.
if (StatusCode.IsBad(results[ii].StatusCode))
{
// this error indicates that the server does not have enough simultaneously active
// continuation points. This request will need to be resent after the other operations
// have been completed and their continuation points released.
if (results[ii].StatusCode == StatusCodes.BadNoContinuationPoints)
{
unprocessedOperations.Add(nodesToBrowse[ii]);
}
continue;
}
// check if all references have been fetched.
if (results[ii].References.Count == 0)
{
continue;
}
// save results.
references.AddRange(results[ii].References);
// check for continuation point.
if (results[ii].ContinuationPoint != null)
{
continuationPoints.Add(results[ii].ContinuationPoint);
}
}
// process continuation points.
ByteStringCollection revisedContiuationPoints = new ByteStringCollection();
while (continuationPoints.Count > 0)
{
// continue browse operation.
session.BrowseNext(
null,
false,
continuationPoints,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, continuationPoints);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, continuationPoints);
for (int ii = 0; ii < continuationPoints.Count; ii++)
{
// check for error.
if (StatusCode.IsBad(results[ii].StatusCode))
{
continue;
}
// check if all references have been fetched.
if (results[ii].References.Count == 0)
{
continue;
}
// save results.
references.AddRange(results[ii].References);
// check for continuation point.
if (results[ii].ContinuationPoint != null)
{
revisedContiuationPoints.Add(results[ii].ContinuationPoint);
}
}
// check if browsing must continue;
revisedContiuationPoints = continuationPoints;
}
// check if unprocessed results exist.
nodesToBrowse = unprocessedOperations;
}
// return complete list.
return references;
}
catch (Exception exception)
{
if (throwOnError)
{
throw new ServiceResultException(exception, StatusCodes.BadUnexpectedError);
}
return null;
}
}
private static BrowseDescriptionCollection PrepareBrowseDescriptionCollection(
NodeId nodeId, uint nodeClassMask)
{
// We do not inspect all references, but only organize and HasComponent.
BrowseDescriptionCollection browseDescriptionCollection = new BrowseDescriptionCollection();
BrowseDescription nodeToBrowse = new BrowseDescription()
{
NodeId = nodeId,
ReferenceTypeId = ReferenceTypeIds.Organizes,
IncludeSubtypes = true,
BrowseDirection = BrowseDirection.Forward,
NodeClassMask = nodeClassMask,
ResultMask = (uint)BrowseResultMask.All
};
browseDescriptionCollection.Add(nodeToBrowse);
nodeToBrowse = new BrowseDescription()
{
NodeId = nodeId,
ReferenceTypeId = ReferenceTypeIds.HasComponent,
IncludeSubtypes = true,
BrowseDirection = BrowseDirection.Forward,
NodeClassMask = nodeClassMask,
ResultMask = (uint)BrowseResultMask.All
};
browseDescriptionCollection.Add(nodeToBrowse);
nodeToBrowse = new BrowseDescription()
{
NodeId = nodeId,
ReferenceTypeId = ReferenceTypeIds.HasChild,
IncludeSubtypes = true,
BrowseDirection = BrowseDirection.Forward,
NodeClassMask = nodeClassMask,
ResultMask = (uint)BrowseResultMask.All
};
browseDescriptionCollection.Add(nodeToBrowse);
nodeToBrowse = new BrowseDescription()
{
NodeId = nodeId,
ReferenceTypeId = ReferenceTypeIds.HasDescription,
IncludeSubtypes = true,
BrowseDirection = BrowseDirection.Forward,
NodeClassMask = nodeClassMask,
ResultMask = (uint)BrowseResultMask.All
};
browseDescriptionCollection.Add(nodeToBrowse);
nodeToBrowse = new BrowseDescription()
{
NodeId = nodeId,
ReferenceTypeId = ReferenceTypeIds.HasProperty,
IncludeSubtypes = true,
BrowseDirection = BrowseDirection.Forward,
NodeClassMask = nodeClassMask,
ResultMask = (uint)BrowseResultMask.All
};
browseDescriptionCollection.Add(nodeToBrowse);
nodeToBrowse = new BrowseDescription
{
NodeId = nodeId,
BrowseDirection = BrowseDirection.Forward,
ReferenceTypeId = ReferenceTypeIds.HasProperty,
IncludeSubtypes = true,
NodeClassMask = (uint)(NodeClass.Variable | NodeClass.Object),
ResultMask = (uint)BrowseResultMask.All
};
browseDescriptionCollection.Add(nodeToBrowse);
return(browseDescriptionCollection);
}
/// <summary>
/// Returns the next reference.
/// </summary>
/// <returns>The next reference that meets the browse criteria.</returns>
public override IReference Next()
{
lock (DataLock)
{
IReference reference = null;
// enumerate pre-defined references.
// always call first to ensure any pushed-back references are returned first.
reference = base.Next();
if (reference != null)
{
return(reference);
}
// don't start browsing huge number of references when only internal references are requested.
if (InternalOnly)
{
return(null);
}
if (m_stage == Stage.Begin)
{
// construct request.
BrowseDescription nodeToBrowse = new BrowseDescription();
NodeId startId = ObjectIds.ObjectsFolder;
if (m_source != null)
{
startId = m_mapper.ToRemoteId(m_source.NodeId);
}
nodeToBrowse.NodeId = startId;
nodeToBrowse.BrowseDirection = this.BrowseDirection;
nodeToBrowse.ReferenceTypeId = this.ReferenceType;
nodeToBrowse.IncludeSubtypes = this.IncludeSubtypes;
nodeToBrowse.NodeClassMask = 0;
nodeToBrowse.ResultMask = (uint)BrowseResultMask.All;
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
nodesToBrowse.Add(nodeToBrowse);
// start the browse operation.
BrowseResultCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
ResponseHeader responseHeader = m_client.Browse(
null,
null,
0,
nodesToBrowse,
out results,
out diagnosticInfos);
// these do sanity checks on the result - make sure response matched the request.
ClientBase.ValidateResponse(results, nodesToBrowse);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToBrowse);
m_position = 0;
m_references = null;
m_continuationPoint = null;
m_stage = Stage.References;
// check status.
if (StatusCode.IsGood(results[0].StatusCode))
{
m_references = results[0].References;
m_continuationPoint = results[0].ContinuationPoint;
reference = NextChild();
if (reference != null)
{
return(reference);
}
}
}
if (m_stage == Stage.References)
{
reference = NextChild();
if (reference != null)
{
return(reference);
}
if (m_source == null && IsRequired(ReferenceTypes.HasNotifier, false))
{
// construct request.
BrowseDescription nodeToBrowse = new BrowseDescription();
nodeToBrowse.NodeId = ObjectIds.Server;
nodeToBrowse.BrowseDirection = BrowseDirection.Forward;
nodeToBrowse.ReferenceTypeId = ReferenceTypes.HasNotifier;
nodeToBrowse.IncludeSubtypes = true;
nodeToBrowse.NodeClassMask = 0;
nodeToBrowse.ResultMask = (uint)BrowseResultMask.All;
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
nodesToBrowse.Add(nodeToBrowse);
// start the browse operation.
BrowseResultCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
ResponseHeader responseHeader = m_client.Browse(
null,
null,
0,
nodesToBrowse,
out results,
out diagnosticInfos);
// these do sanity checks on the result - make sure response matched the request.
ClientBase.ValidateResponse(results, nodesToBrowse);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToBrowse);
m_position = 0;
m_references = null;
m_continuationPoint = null;
m_stage = Stage.Notifiers;
// check status.
if (StatusCode.IsGood(results[0].StatusCode))
{
m_references = results[0].References;
m_continuationPoint = results[0].ContinuationPoint;
}
}
m_stage = Stage.Notifiers;
}
if (m_stage == Stage.Notifiers)
{
reference = NextChild();
if (reference != null)
{
return(reference);
}
m_stage = Stage.Done;
}
// all done.
return(null);
}
}
/// <summary>
/// 读取一个节点的所有属性
/// </summary>
/// <param name="tag">节点信息</param>
/// <returns>节点的特性值</returns>
public OpcNodeAttribute[] ReadNoteAttributes(string tag)
{
NodeId sourceId = new NodeId(tag);
ReadValueIdCollection nodesToRead = new ReadValueIdCollection();
// attempt to read all possible attributes.
// 尝试着去读取所有可能的特性
for (uint ii = Attributes.NodeClass; ii <= Attributes.UserExecutable; ii++)
{
ReadValueId nodeToRead = new ReadValueId();
nodeToRead.NodeId = sourceId;
nodeToRead.AttributeId = ii;
nodesToRead.Add(nodeToRead);
}
int startOfProperties = nodesToRead.Count;
// find all of the pror of the node.
BrowseDescription nodeToBrowse1 = new BrowseDescription();
nodeToBrowse1.NodeId = sourceId;
nodeToBrowse1.BrowseDirection = BrowseDirection.Forward;
nodeToBrowse1.ReferenceTypeId = ReferenceTypeIds.HasProperty;
nodeToBrowse1.IncludeSubtypes = true;
nodeToBrowse1.NodeClassMask = 0;
nodeToBrowse1.ResultMask = (uint)BrowseResultMask.All;
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
nodesToBrowse.Add(nodeToBrowse1);
// fetch property references from the server.
ReferenceDescriptionCollection references = FormUtils.Browse(m_session, nodesToBrowse, false);
if (references == null)
{
return(new OpcNodeAttribute[0]);
}
for (int ii = 0; ii < references.Count; ii++)
{
// ignore external references.
if (references[ii].NodeId.IsAbsolute)
{
continue;
}
ReadValueId nodeToRead = new ReadValueId();
nodeToRead.NodeId = (NodeId)references[ii].NodeId;
nodeToRead.AttributeId = Attributes.Value;
nodesToRead.Add(nodeToRead);
}
// read all values.
DataValueCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
m_session.Read(
null,
0,
TimestampsToReturn.Neither,
nodesToRead,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, nodesToRead);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToRead);
// process results.
List <OpcNodeAttribute> nodeAttribute = new List <OpcNodeAttribute>();
for (int ii = 0; ii < results.Count; ii++)
{
OpcNodeAttribute item = new OpcNodeAttribute();
// process attribute value.
if (ii < startOfProperties)
{
// ignore attributes which are invalid for the node.
if (results[ii].StatusCode == StatusCodes.BadAttributeIdInvalid)
{
continue;
}
// get the name of the attribute.
item.Name = Attributes.GetBrowseName(nodesToRead[ii].AttributeId);
// display any unexpected error.
if (StatusCode.IsBad(results[ii].StatusCode))
{
item.Type = Utils.Format("{0}", Attributes.GetDataTypeId(nodesToRead[ii].AttributeId));
item.Value = Utils.Format("{0}", results[ii].StatusCode);
}
// display the value.
else
{
TypeInfo typeInfo = TypeInfo.Construct(results[ii].Value);
item.Type = typeInfo.BuiltInType.ToString();
if (typeInfo.ValueRank >= ValueRanks.OneOrMoreDimensions)
{
item.Type += "[]";
}
item.Value = results[ii].Value;//Utils.Format("{0}", results[ii].Value);
}
}
// process property value.
else
{
// ignore properties which are invalid for the node.
if (results[ii].StatusCode == StatusCodes.BadNodeIdUnknown)
{
continue;
}
// get the name of the property.
item.Name = Utils.Format("{0}", references[ii - startOfProperties]);
// display any unexpected error.
if (StatusCode.IsBad(results[ii].StatusCode))
{
item.Type = String.Empty;
item.Value = Utils.Format("{0}", results[ii].StatusCode);
}
// display the value.
else
{
TypeInfo typeInfo = TypeInfo.Construct(results[ii].Value);
item.Type = typeInfo.BuiltInType.ToString();
if (typeInfo.ValueRank >= ValueRanks.OneOrMoreDimensions)
{
item.Type += "[]";
}
item.Value = results[ii].Value; //Utils.Format("{0}", results[ii].Value);
}
}
nodeAttribute.Add(item);
}
return(nodeAttribute.ToArray());
}
/// <summary>
/// Reads the arguments for the method.
/// </summary>
private void ReadArguments(NodeId nodeId)
{
m_inputArguments = null;
m_outputArguments = null;
// build list of references to browse.
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
BrowseDescription nodeToBrowse = new BrowseDescription();
nodeToBrowse.NodeId = nodeId;
nodeToBrowse.BrowseDirection = BrowseDirection.Forward;
nodeToBrowse.ReferenceTypeId = Opc.Ua.ReferenceTypeIds.HasProperty;
nodeToBrowse.IncludeSubtypes = true;
nodeToBrowse.NodeClassMask = (uint)NodeClass.Variable;
nodeToBrowse.ResultMask = (uint)BrowseResultMask.BrowseName;
nodesToBrowse.Add(nodeToBrowse);
// find properties.
ReferenceDescriptionCollection references = ClientUtils.Browse(m_session, null, nodesToBrowse, false);
// build list of properties to read.
ReadValueIdCollection nodesToRead = new ReadValueIdCollection();
for (int ii = 0; references != null && ii < references.Count; ii++)
{
ReferenceDescription reference = references[ii];
// ignore out of server references.
if (reference.NodeId.IsAbsolute)
{
continue;
}
// ignore other properties.
if (reference.BrowseName != Opc.Ua.BrowseNames.InputArguments && reference.BrowseName != Opc.Ua.BrowseNames.OutputArguments)
{
continue;
}
ReadValueId nodeToRead = new ReadValueId();
nodeToRead.NodeId = (NodeId)reference.NodeId;
nodeToRead.AttributeId = Attributes.Value;
nodeToRead.Handle = reference;
nodesToRead.Add(nodeToRead);
}
// method has no arguments.
if (nodesToRead.Count == 0)
{
return;
}
// read the arguments.
DataValueCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
m_session.Read(
null,
0,
TimestampsToReturn.Neither,
nodesToRead,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, nodesToRead);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToRead);
// save the results.
for (int ii = 0; ii < results.Count; ii++)
{
ReferenceDescription reference = (ReferenceDescription)nodesToRead[ii].Handle;
if (StatusCode.IsGood(results[ii].StatusCode))
{
if (reference.BrowseName == Opc.Ua.BrowseNames.InputArguments)
{
m_inputArguments = (Argument[])ExtensionObject.ToArray(results[ii].GetValue <ExtensionObject[]>(null), typeof(Argument));
}
if (reference.BrowseName == Opc.Ua.BrowseNames.OutputArguments)
{
m_outputArguments = (Argument[])ExtensionObject.ToArray(results[ii].GetValue <ExtensionObject[]>(null), typeof(Argument));
}
}
}
// set default values for input arguments.
if (m_inputArguments != null)
{
foreach (Argument argument in m_inputArguments)
{
argument.Value = TypeInfo.GetDefaultValue(argument.DataType, argument.ValueRank, m_session.TypeTree);
}
}
}
/// <summary>
/// 读取一个节点的所有属性
/// </summary>
/// <param name="tag">节点值</param>
/// <returns>所有的数据</returns>
public DataValue[] ReadNoteDataValueAttributes(string tag)
{
NodeId sourceId = new NodeId(tag);
ReadValueIdCollection nodesToRead = new ReadValueIdCollection();
// attempt to read all possible attributes.
// 尝试着去读取所有可能的特性
for (uint ii = Attributes.NodeId; ii <= Attributes.UserExecutable; ii++)
{
ReadValueId nodeToRead = new ReadValueId();
nodeToRead.NodeId = sourceId;
nodeToRead.AttributeId = ii;
nodesToRead.Add(nodeToRead);
}
int startOfProperties = nodesToRead.Count;
// find all of the pror of the node.
BrowseDescription nodeToBrowse1 = new BrowseDescription();
nodeToBrowse1.NodeId = sourceId;
nodeToBrowse1.BrowseDirection = BrowseDirection.Forward;
nodeToBrowse1.ReferenceTypeId = ReferenceTypeIds.HasProperty;
nodeToBrowse1.IncludeSubtypes = true;
nodeToBrowse1.NodeClassMask = 0;
nodeToBrowse1.ResultMask = (uint)BrowseResultMask.All;
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
nodesToBrowse.Add(nodeToBrowse1);
// fetch property references from the server.
ReferenceDescriptionCollection references = FormUtils.Browse(m_session, nodesToBrowse, false);
if (references == null)
{
return(new DataValue[0]);
}
for (int ii = 0; ii < references.Count; ii++)
{
// ignore external references.
if (references[ii].NodeId.IsAbsolute)
{
continue;
}
ReadValueId nodeToRead = new ReadValueId();
nodeToRead.NodeId = (NodeId)references[ii].NodeId;
nodeToRead.AttributeId = Attributes.Value;
nodesToRead.Add(nodeToRead);
}
// read all values.
DataValueCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
m_session.Read(
null,
0,
TimestampsToReturn.Neither,
nodesToRead,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, nodesToRead);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToRead);
return(results.ToArray());
}
static void Browse(Session session)
{
DiagnosticInfoCollection diagnosticInfos;
BrowseDescriptionCollection bc = new BrowseDescriptionCollection();
BrowseDescription bd = new BrowseDescription();
bd.BrowseDirection = BrowseDirection.Forward;
NodeId nodeId = Opc.Ua.Objects.ObjectsFolder;
do
{
Console.WriteLine("\n Enter nodeId to Browse (or q to exit)");
string s = Console.ReadLine();
if (s == "q")
break;
if (s.Length == 0)
{
nodeId = Opc.Ua.Objects.ObjectsFolder;
}
else
nodeId = new NodeId(s);
bc.Clear();
bd.NodeId = nodeId;
bc.Add(bd);
BrowseResultCollection results;
ResponseHeader rh =
session.Browse(null, null, 100, bc, out results, out diagnosticInfos);
foreach ( BrowseResult res in results)
{
foreach (ReferenceDescription rdc in res.References)
{
Console.WriteLine(String.Format(" Node = {0} (namespace {1}) {2}", rdc.NodeId.ToString(),rdc.NodeId.NamespaceIndex, Environment.NewLine));
}
}
} while (true);
}
/// <summary>
/// Gets the list of references to follow.
/// </summary>
private BrowseDescriptionCollection CreateNodesToBrowse()
{
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
if (ReferenceTypeIds != null && ReferenceTypeIds.Length > 0)
{
for (int ii = 0; ii < ReferenceTypeIds.Length; ii++)
{
BrowseDescription nodeToBrowse = new BrowseDescription();
nodeToBrowse.NodeId = NodeId;
nodeToBrowse.BrowseDirection = BrowseDirection;
nodeToBrowse.ReferenceTypeId = ReferenceTypeIds[ii];
nodeToBrowse.IncludeSubtypes = true;
nodeToBrowse.NodeClassMask = 0;
nodeToBrowse.ResultMask = (uint)BrowseResultMask.All;
nodesToBrowse.Add(nodeToBrowse);
}
}
else
{
BrowseDescription nodeToBrowse = new BrowseDescription();
nodeToBrowse.NodeId = NodeId;
nodeToBrowse.BrowseDirection = BrowseDirection;
nodeToBrowse.ReferenceTypeId = Opc.Ua.ReferenceTypeIds.References;
nodeToBrowse.IncludeSubtypes = true;
nodeToBrowse.NodeClassMask = 0;
nodeToBrowse.ResultMask = (uint)BrowseResultMask.All;
nodesToBrowse.Add(nodeToBrowse);
}
return nodesToBrowse;
}
/// <summary>
/// Browses the address space and returns the references found.
/// </summary>
/// <param name="session">The session.</param>
/// <param name="nodesToBrowse">The set of browse operations to perform.</param>
/// <param name="throwOnError">if set to <c>true</c> a exception will be thrown on an error.</param>
/// <returns>
/// The references found. Null if an error occurred.
/// </returns>
public static ReferenceDescriptionCollection Browse(Session session, BrowseDescriptionCollection nodesToBrowse, bool throwOnError)
{
return(Browse(session, null, nodesToBrowse, throwOnError));
}
/// <summary>
/// Handles the BeforeExpand event of the BrowseTV control.
/// </summary>
private void BrowseTV_BeforeExpand(object sender, TreeViewCancelEventArgs e)
{
try {
ReferenceDescription reference = (ReferenceDescription)e.Node.Tag;
e.Node.Nodes.Clear();
// build list of references to browse.
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
for (int ii = 0; ii < m_referenceTypeIds.Length; ii++)
{
BrowseDescription nodeToBrowse = new BrowseDescription();
nodeToBrowse.NodeId = m_rootId;
nodeToBrowse.BrowseDirection = BrowseDirection.Forward;
nodeToBrowse.ReferenceTypeId = m_referenceTypeIds[ii];
nodeToBrowse.IncludeSubtypes = true;
nodeToBrowse.NodeClassMask = 0;
nodeToBrowse.ResultMask = (uint)BrowseResultMask.All;
if (reference != null)
{
nodeToBrowse.NodeId = (NodeId)reference.NodeId;
}
nodesToBrowse.Add(nodeToBrowse);
}
// add the childen to the control.
SortedDictionary <ExpandedNodeId, TreeNode> dictionary =
new SortedDictionary <ExpandedNodeId, TreeNode>();
ReferenceDescriptionCollection references = ClientUtils.Browse(m_session, View, nodesToBrowse, false);
for (int ii = 0; references != null && ii < references.Count; ii++)
{
reference = references[ii];
// ignore out of server references.
if (reference.NodeId.IsAbsolute)
{
continue;
}
if (dictionary.ContainsKey(reference.NodeId))
{
continue;
}
TreeNode child = new TreeNode(reference.ToString());
child.Nodes.Add(new TreeNode());
child.Tag = reference;
if (!reference.TypeDefinition.IsAbsolute)
{
try {
if (!m_typeImageMapping.ContainsKey((NodeId)reference.TypeDefinition))
{
List <NodeId> nodeIds = ClientUtils.TranslateBrowsePaths(m_session,
(NodeId)reference.TypeDefinition, m_session.NamespaceUris,
Opc.Ua.BrowseNames.Icon);
if (nodeIds.Count > 0 && nodeIds[0] != null)
{
DataValue value = m_session.ReadValue(nodeIds[0]);
byte[] bytes = value.Value as byte[];
if (bytes != null)
{
System.IO.MemoryStream istrm = new System.IO.MemoryStream(bytes);
Image icon = Image.FromStream(istrm);
BrowseTV.ImageList.Images.Add(icon);
m_typeImageMapping[(NodeId)reference.TypeDefinition] =
BrowseTV.ImageList.Images.Count - 1;
}
}
}
} catch (Exception exception) {
Utils.Trace(exception, "Error loading image.");
}
}
int index = 0;
if (!m_typeImageMapping.TryGetValue((NodeId)reference.TypeDefinition, out index))
{
child.ImageIndex = ClientUtils.GetImageIndex(m_session, reference.NodeClass,
reference.TypeDefinition, false);
child.SelectedImageIndex = ClientUtils.GetImageIndex(m_session, reference.NodeClass,
reference.TypeDefinition, true);
}
else
{
child.ImageIndex = index;
child.SelectedImageIndex = index;
}
dictionary[reference.NodeId] = child;
}
// add nodes to tree.
foreach (TreeNode node in dictionary.Values.OrderBy(i => i.Text))
{
e.Node.Nodes.Add(node);
}
} catch (Exception exception) {
ClientUtils.HandleException(this.Text, exception);
}
}
/// <summary>
/// Finds the targets for the specified reference.
/// </summary>
private static List <NodeId> FindTargetOfReference(Session session, List <NodeId> nodeIds, NodeId referenceTypeId, bool throwOnError)
{
try
{
// construct browse request.
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection( );
for (int ii = 0; ii < nodeIds.Count; ii++)
{
BrowseDescription nodeToBrowse = new BrowseDescription( );
nodeToBrowse.NodeId = nodeIds[ii];
nodeToBrowse.BrowseDirection = BrowseDirection.Forward;
nodeToBrowse.ReferenceTypeId = referenceTypeId;
nodeToBrowse.IncludeSubtypes = false;
nodeToBrowse.NodeClassMask = 0;
nodeToBrowse.ResultMask = (uint)BrowseResultMask.None;
nodesToBrowse.Add(nodeToBrowse);
}
// start the browse operation.
BrowseResultCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
session.Browse(
null,
null,
1,
nodesToBrowse,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, nodesToBrowse);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToBrowse);
List <NodeId> targetIds = new List <NodeId>( );
ByteStringCollection continuationPoints = new ByteStringCollection( );
for (int ii = 0; ii < nodeIds.Count; ii++)
{
targetIds.Add(null);
// check for error.
if (StatusCode.IsBad(results[ii].StatusCode))
{
continue;
}
// check for continuation point.
if (results[ii].ContinuationPoint != null && results[ii].ContinuationPoint.Length > 0)
{
continuationPoints.Add(results[ii].ContinuationPoint);
}
// get the node id.
if (results[ii].References.Count > 0)
{
if (NodeId.IsNull(results[ii].References[0].NodeId) || results[ii].References[0].NodeId.IsAbsolute)
{
continue;
}
targetIds[ii] = (NodeId)results[ii].References[0].NodeId;
}
}
// release continuation points.
if (continuationPoints.Count > 0)
{
session.BrowseNext(
null,
true,
continuationPoints,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, nodesToBrowse);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToBrowse);
}
//return complete list.
return(targetIds);
}
catch (Exception exception)
{
if (throwOnError)
{
throw new ServiceResultException(exception, StatusCodes.BadUnexpectedError);
}
return(null);
}
}
/// <summary>
/// Fetches the references for the node.
/// </summary>
private List <ReferenceDescription> Browse(Session session, NodeId nodeId)
{
List <ReferenceDescription> references = new List <ReferenceDescription>();
// specify the references to follow and the fields to return.
BrowseDescription nodeToBrowse = new BrowseDescription();
nodeToBrowse.NodeId = nodeId;
nodeToBrowse.ReferenceTypeId = ReferenceTypeIds.References;
nodeToBrowse.IncludeSubtypes = true;
nodeToBrowse.BrowseDirection = BrowseDirection.Both;
nodeToBrowse.NodeClassMask = 0;
nodeToBrowse.ResultMask = (uint)BrowseResultMask.All;
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
nodesToBrowse.Add(nodeToBrowse);
// start the browse operation.
BrowseResultCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
ResponseHeader responseHeader = session.Browse(
null,
null,
2,
nodesToBrowse,
out results,
out diagnosticInfos);
// these do sanity checks on the result - make sure response matched the request.
ClientBase.ValidateResponse(results, nodesToBrowse);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToBrowse);
// check status.
if (StatusCode.IsBad(results[0].StatusCode))
{
// embed the diagnostic information in a exception.
throw ServiceResultException.Create(results[0].StatusCode, 0, diagnosticInfos, responseHeader.StringTable);
}
// add first batch.
references.AddRange(results[0].References);
// check if server limited the results.
while (results[0].ContinuationPoint != null && results[0].ContinuationPoint.Length > 0)
{
ByteStringCollection continuationPoints = new ByteStringCollection();
continuationPoints.Add(results[0].ContinuationPoint);
// continue browse operation.
responseHeader = session.BrowseNext(
null,
false,
continuationPoints,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, continuationPoints);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, continuationPoints);
// check status.
if (StatusCode.IsBad(results[0].StatusCode))
{
// embed the diagnostic information in a exception.
throw ServiceResultException.Create(results[0].StatusCode, 0, diagnosticInfos, responseHeader.StringTable);
}
// add next batch.
references.AddRange(results[0].References);
}
return(references);
}
/// <summary>
/// Browses the node and returns the references found.
/// </summary>
protected virtual bool Browse(
Node node,
BrowseDescription nodeToBrowse,
ReferenceDescriptionCollection references)
{
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
nodesToBrowse.Add(nodeToBrowse);
BrowseResultCollection results;
DiagnosticInfoCollection diagnosticInfos;
RequestHeader requestHeader = new RequestHeader();
requestHeader.ReturnDiagnostics = 0;
Session.Browse(
requestHeader,
new ViewDescription(),
0,
nodesToBrowse,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, nodesToBrowse);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToBrowse);
// check diagnostics.
if (diagnosticInfos != null && diagnosticInfos.Count > 0)
{
Log("Returned non-empty DiagnosticInfos array during Browse.");
return false;
}
// process results.
ByteStringCollection continuationPoints = new ByteStringCollection();
for (int ii = 0; ii < results.Count; ii++)
{
// check status code.
if (StatusCode.IsBad(results[ii].StatusCode))
{
Log(
"Browse Failed for Node '{0}'. Status = {2}, NodeId = {1}",
node,
node.NodeId,
results[ii].StatusCode);
return false;
}
// save references.
references.AddRange(results[ii].References);
if (results[ii].ContinuationPoint != null)
{
continuationPoints.Add(results[ii].ContinuationPoint);
}
}
// process continuation points.
while (continuationPoints.Count > 0)
{
requestHeader = new RequestHeader();
requestHeader.ReturnDiagnostics = 0;
Session.BrowseNext(
requestHeader,
false,
continuationPoints,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, continuationPoints);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, continuationPoints);
// check diagnostics.
if (diagnosticInfos != null && diagnosticInfos.Count > 0)
{
Log("Returned non-empty DiagnosticInfos array during BrowseNext.");
return false;
}
continuationPoints.Clear();
// process results.
for (int ii = 0; ii < results.Count; ii++)
{
// check status code.
if (StatusCode.IsBad(results[ii].StatusCode))
{
Log(
"BrowseNext Failed for Node '{0}'. Status = {2}, NodeId = {1}",
node,
node.NodeId,
results[ii].StatusCode);
return false;
}
// save references.
references.AddRange(results[ii].References);
if (results[ii].ContinuationPoint != null)
{
// check max references.
if (results[ii].References.Count == 0)
{
Log(
"No references returned with a continuation point for Node '{0}'. NodeId = {1}",
node,
node.NodeId);
return false;
}
continuationPoints.Add(results[ii].ContinuationPoint);
}
}
}
return true;
}
/// <summary>
/// Returns the set of references that meet the filter criteria.
/// </summary>
public virtual void Browse(
OperationContext context,
ViewDescription view,
uint maxReferencesPerNode,
BrowseDescriptionCollection nodesToBrowse,
out BrowseResultCollection results,
out DiagnosticInfoCollection diagnosticInfos)
{
if (context == null) throw new ArgumentNullException("context");
if (nodesToBrowse == null) throw new ArgumentNullException("nodesToBrowse");
if (view != null && !NodeId.IsNull(view.ViewId))
{
INodeManager viewManager = null;
object viewHandle = GetManagerHandle(view.ViewId, out viewManager);
if (viewHandle == null)
{
throw new ServiceResultException(StatusCodes.BadViewIdUnknown);
}
NodeMetadata metadata = viewManager.GetNodeMetadata(context, viewHandle, BrowseResultMask.NodeClass);
if (metadata == null || metadata.NodeClass != NodeClass.View)
{
throw new ServiceResultException(StatusCodes.BadViewIdUnknown);
}
view.Handle = viewHandle;
}
bool diagnosticsExist = false;
results = new BrowseResultCollection(nodesToBrowse.Count);
diagnosticInfos = new DiagnosticInfoCollection(nodesToBrowse.Count);
uint continuationPointsAssigned = 0;
for (int ii = 0; ii < nodesToBrowse.Count; ii++)
{
// check if request has timed out or been cancelled.
if (StatusCode.IsBad(context.OperationStatus))
{
// release all allocated continuation points.
foreach (BrowseResult current in results)
{
if (current != null && current.ContinuationPoint != null && current.ContinuationPoint.Length > 0)
{
ContinuationPoint cp = context.Session.RestoreContinuationPoint(current.ContinuationPoint);
cp.Dispose();
}
}
throw new ServiceResultException(context.OperationStatus);
}
BrowseDescription nodeToBrowse = nodesToBrowse[ii];
// initialize result.
BrowseResult result = new BrowseResult();
result.StatusCode = StatusCodes.Good;
results.Add(result);
ServiceResult error = null;
// need to trap unexpected exceptions to handle bugs in the node managers.
try
{
error = Browse(
context,
view,
maxReferencesPerNode,
continuationPointsAssigned < m_maxContinuationPointsPerBrowse,
nodeToBrowse,
result);
}
catch (Exception e)
{
error = ServiceResult.Create(e, StatusCodes.BadUnexpectedError, "Unexpected error browsing node.");
}
// check for continuation point.
if (result.ContinuationPoint != null && result.ContinuationPoint.Length > 0)
{
continuationPointsAssigned++;
}
// check for error.
result.StatusCode = error.StatusCode;
if ((context.DiagnosticsMask & DiagnosticsMasks.OperationAll) != 0)
{
DiagnosticInfo diagnosticInfo = null;
if (error != null && error.Code != StatusCodes.Good)
{
diagnosticInfo = ServerUtils.CreateDiagnosticInfo(m_server, context, error);
diagnosticsExist = true;
}
diagnosticInfos.Add(diagnosticInfo);
}
}
// clear the diagnostics array if no diagnostics requested or no errors occurred.
UpdateDiagnostics(context, diagnosticsExist, ref diagnosticInfos);
}
/// <summary>
/// Displays the attributes and properties in the attributes view.
/// </summary>
/// <param name="sourceId">The NodeId of the Node to browse.</param>
private void DisplayAttributes(NodeId sourceId)
{
try
{
AttributesView.Items.Clear();
ReadValueIdCollection nodesToRead = new ReadValueIdCollection();
// attempt to read all possible attributes.
for (uint ii = Attributes.NodeClass; ii <= Attributes.UserExecutable; ii++)
{
ReadValueId nodeToRead = new ReadValueId();
nodeToRead.NodeId = sourceId;
nodeToRead.AttributeId = ii;
nodesToRead.Add(nodeToRead);
}
int startOfProperties = nodesToRead.Count;
// find all of the pror of the node.
BrowseDescription nodeToBrowse1 = new BrowseDescription();
nodeToBrowse1.NodeId = sourceId;
nodeToBrowse1.BrowseDirection = BrowseDirection.Forward;
nodeToBrowse1.ReferenceTypeId = ReferenceTypeIds.HasProperty;
nodeToBrowse1.IncludeSubtypes = true;
nodeToBrowse1.NodeClassMask = 0;
nodeToBrowse1.ResultMask = (uint)BrowseResultMask.All;
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
nodesToBrowse.Add(nodeToBrowse1);
// fetch property references from the server.
ReferenceDescriptionCollection references = Browse(m_server, nodesToBrowse, false);
if (references == null)
{
return;
}
for (int ii = 0; ii < references.Count; ii++)
{
// ignore external references.
if (references[ii].NodeId.IsAbsolute)
{
continue;
}
ReadValueId nodeToRead = new ReadValueId();
nodeToRead.NodeId = (NodeId)references[ii].NodeId;
nodeToRead.AttributeId = Attributes.Value;
nodesToRead.Add(nodeToRead);
}
// read all values.
OperationContext context = new OperationContext(new RequestHeader(), RequestType.Browse);
DataValueCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
m_server.CurrentInstance.NodeManager.Read(
context,
0,
TimestampsToReturn.Neither,
nodesToRead,
out results,
out diagnosticInfos);
ListViewItem idnode = new ListViewItem("NodeID");
idnode.SubItems.Add(sourceId.ToString());
AttributesView.Items.Add(idnode);
// process results.
for (int ii = 0; ii < results.Count; ii++)
{
string name = null;
string datatype = null;
string value = null;
// process attribute value.
if (ii < startOfProperties)
{
// ignore attributes which are invalid for the node.
if (results[ii].StatusCode == StatusCodes.BadAttributeIdInvalid)
{
continue;
}
// get the name of the attribute.
name = Attributes.GetBrowseName(nodesToRead[ii].AttributeId);
// display any unexpected error.
if (StatusCode.IsBad(results[ii].StatusCode))
{
datatype = Utils.Format("{0}", Attributes.GetDataTypeId(nodesToRead[ii].AttributeId));
value = Utils.Format("{0}", results[ii].StatusCode);
}
// display the value.
else
{
TypeInfo typeInfo = TypeInfo.Construct(results[ii].Value);
datatype = typeInfo.BuiltInType.ToString();
if (typeInfo.ValueRank >= ValueRanks.OneOrMoreDimensions)
{
datatype += "[]";
}
value = Utils.Format("{0}", results[ii].Value);
}
}
// process property value.
else
{
// ignore properties which are invalid for the node.
if (results[ii].StatusCode == StatusCodes.BadNodeIdUnknown)
{
continue;
}
// get the name of the property.
name = Utils.Format("{0}", references[ii - startOfProperties]);
// display any unexpected error.
if (StatusCode.IsBad(results[ii].StatusCode))
{
datatype = String.Empty;
value = Utils.Format("{0}", results[ii].StatusCode);
}
// display the value.
else
{
TypeInfo typeInfo = TypeInfo.Construct(results[ii].Value);
datatype = typeInfo.BuiltInType.ToString();
if (typeInfo.ValueRank >= ValueRanks.OneOrMoreDimensions)
{
datatype += "[]";
}
value = Utils.Format("{0}", results[ii].Value);
}
}
// add the attribute name/value to the list view.
ListViewItem item = new ListViewItem(name);
item.SubItems.Add(value);
item.SubItems.Add(datatype);
AttributesView.Items.Add(item);
}
// adjust width of all columns.
for (int ii = 0; ii < AttributesView.Columns.Count; ii++)
{
AttributesView.Columns[ii].Width = -2;
}
}
catch (Exception exception)
{
ServerUtils.HandleException(this.Text, exception);
}
}
/// <summary>
/// Browses the node and returns the references found.
/// </summary>
protected virtual bool Browse(
Node node,
BrowseDescription nodeToBrowse,
ReferenceDescriptionCollection references)
{
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
nodesToBrowse.Add(nodeToBrowse);
BrowseResultCollection results;
DiagnosticInfoCollection diagnosticInfos;
RequestHeader requestHeader = new RequestHeader();
requestHeader.ReturnDiagnostics = 0;
Session.Browse(
requestHeader,
new ViewDescription(),
0,
nodesToBrowse,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, nodesToBrowse);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToBrowse);
// check diagnostics.
if (diagnosticInfos != null && diagnosticInfos.Count > 0)
{
Log("Returned non-empty DiagnosticInfos array during Browse.");
return(false);
}
// process results.
ByteStringCollection continuationPoints = new ByteStringCollection();
for (int ii = 0; ii < results.Count; ii++)
{
// check status code.
if (StatusCode.IsBad(results[ii].StatusCode))
{
Log(
"Browse Failed for Node '{0}'. Status = {2}, NodeId = {1}",
node,
node.NodeId,
results[ii].StatusCode);
return(false);
}
// save references.
references.AddRange(results[ii].References);
if (results[ii].ContinuationPoint != null)
{
continuationPoints.Add(results[ii].ContinuationPoint);
}
}
// process continuation points.
while (continuationPoints.Count > 0)
{
requestHeader = new RequestHeader();
requestHeader.ReturnDiagnostics = 0;
Session.BrowseNext(
requestHeader,
false,
continuationPoints,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, continuationPoints);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, continuationPoints);
// check diagnostics.
if (diagnosticInfos != null && diagnosticInfos.Count > 0)
{
Log("Returned non-empty DiagnosticInfos array during BrowseNext.");
return(false);
}
continuationPoints.Clear();
// process results.
for (int ii = 0; ii < results.Count; ii++)
{
// check status code.
if (StatusCode.IsBad(results[ii].StatusCode))
{
Log(
"BrowseNext Failed for Node '{0}'. Status = {2}, NodeId = {1}",
node,
node.NodeId,
results[ii].StatusCode);
return(false);
}
// save references.
references.AddRange(results[ii].References);
if (results[ii].ContinuationPoint != null)
{
// check max references.
if (results[ii].References.Count == 0)
{
Log(
"No references returned with a continuation point for Node '{0}'. NodeId = {1}",
node,
node.NodeId);
return(false);
}
continuationPoints.Add(results[ii].ContinuationPoint);
}
}
}
return(true);
}
/// <summary>
/// Invokes the Browse service.
/// </summary>
public virtual ResponseHeader Browse(
RequestHeader requestHeader,
ViewDescription view,
uint requestedMaxReferencesPerNode,
BrowseDescriptionCollection nodesToBrowse,
out BrowseResultCollection results,
out DiagnosticInfoCollection diagnosticInfos)
{
results = null;
diagnosticInfos = null;
ValidateRequest(requestHeader);
// Insert implementation.
return CreateResponse(requestHeader, StatusCodes.BadServiceUnsupported);
}
/// <summary>
/// Browses the children of the node and updates the tree.
/// </summary>
private bool BrowseChildren(TreeNode parent)
{
ReferenceDescription reference = parent.Tag as ReferenceDescription;
if (reference == null)
{
return false;
}
parent.Nodes.Clear();
if (reference.NodeId.IsAbsolute)
{
return false;
}
BrowseDescription nodeToBrowse = new BrowseDescription();
nodeToBrowse.NodeId = (NodeId)reference.NodeId;
nodeToBrowse.BrowseDirection = m_browseDirection;
nodeToBrowse.ReferenceTypeId = m_referenceTypeId;
nodeToBrowse.IncludeSubtypes = true;
nodeToBrowse.NodeClassMask = 0;
nodeToBrowse.ResultMask = (uint)(int)BrowseResultMask.All;
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
nodesToBrowse.Add(nodeToBrowse);
ViewDescription view = null;
if (NodeId.IsNull(m_viewId))
{
view = new ViewDescription();
view.ViewId = m_viewId;
view.Timestamp = DateTime.MinValue;
view.ViewVersion = 0;
}
BrowseResultCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
m_session.Browse(
null,
view,
0,
nodesToBrowse,
out results,
out diagnosticInfos);
if (results.Count != 1 || StatusCode.IsBad(results[0].StatusCode))
{
return false;
}
UpdateNode(parent, results[0].References);
while (results[0].ContinuationPoint != null && results[0].ContinuationPoint.Length > 0)
{
ByteStringCollection continuationPoints = new ByteStringCollection();
continuationPoints.Add(results[0].ContinuationPoint);
m_session.BrowseNext(
null,
parent == null,
continuationPoints,
out results,
out diagnosticInfos);
if (results.Count != 1 || StatusCode.IsBad(results[0].StatusCode))
{
return false;
}
UpdateNode(parent, results[0].References);
}
return true;
}
