/// <summary>
/// Collects the fields for the instance node.
/// </summary>
/// <param name="session">The session.</param>
/// <param name="nodeId">The node id.</param>
/// <param name="parentPath">The parent path.</param>
/// <param name="fields">The event fields.</param>
/// <param name="fieldNodeIds">The node id for the declaration of the field.</param>
/// <param name="foundNodes">The table of found nodes.</param>
private static void CollectFields(
Session session,
NodeId nodeId,
QualifiedNameCollection parentPath,
SimpleAttributeOperandCollection fields,
List <NodeId> fieldNodeIds,
Dictionary <NodeId, QualifiedNameCollection> foundNodes)
{
// find all of the children of the field.
BrowseDescription nodeToBrowse = new BrowseDescription( );
nodeToBrowse.NodeId = nodeId;
nodeToBrowse.BrowseDirection = BrowseDirection.Forward;
nodeToBrowse.ReferenceTypeId = ReferenceTypeIds.Aggregates;
nodeToBrowse.IncludeSubtypes = true;
nodeToBrowse.NodeClassMask = (uint)(NodeClass.Object | NodeClass.Variable);
nodeToBrowse.ResultMask = (uint)BrowseResultMask.All;
ReferenceDescriptionCollection children = FormUtils.Browse(session, nodeToBrowse, false);
if (children == null)
{
return;
}
// process the children.
for (int ii = 0; ii < children.Count; ii++)
{
ReferenceDescription child = children[ii];
if (child.NodeId.IsAbsolute)
{
continue;
}
// construct browse path.
QualifiedNameCollection browsePath = new QualifiedNameCollection(parentPath);
browsePath.Add(child.BrowseName);
// check if the browse path is already in the list.
int index = ContainsPath(fields, browsePath);
if (index < 0)
{
SimpleAttributeOperand field = new SimpleAttributeOperand( );
field.TypeDefinitionId = ObjectTypeIds.BaseEventType;
field.BrowsePath = browsePath;
field.AttributeId = (child.NodeClass == NodeClass.Variable) ? Attributes.Value : Attributes.NodeId;
fields.Add(field);
fieldNodeIds.Add((NodeId)child.NodeId);
}
// recusively find all of the children.
NodeId targetId = (NodeId)child.NodeId;
// need to guard against loops.
if (!foundNodes.ContainsKey(targetId))
{
foundNodes.Add(targetId, browsePath);
CollectFields(session, (NodeId)child.NodeId, browsePath, fields, fieldNodeIds, foundNodes);
}
}
}
/// <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( ));
}
/// <summary>
/// Constructs an event object from a notification.
/// </summary>
/// <param name="session">The session.</param>
/// <param name="monitoredItem">The monitored item that produced the notification.</param>
/// <param name="notification">The notification.</param>
/// <param name="knownEventTypes">The known event types.</param>
/// <param name="eventTypeMappings">Mapping between event types and known event types.</param>
/// <returns>
/// The event object. Null if the notification is not a valid event type.
/// </returns>
public static BaseEventState ConstructEvent(
Session session,
MonitoredItem monitoredItem,
EventFieldList notification,
Dictionary <NodeId, Type> knownEventTypes,
Dictionary <NodeId, NodeId> eventTypeMappings)
{
// find the event type.
NodeId eventTypeId = FindEventType(monitoredItem, notification);
if (eventTypeId == null)
{
return(null);
}
// look up the known event type.
Type knownType = null;
NodeId knownTypeId = null;
if (eventTypeMappings.TryGetValue(eventTypeId, out knownTypeId))
{
knownType = knownEventTypes[knownTypeId];
}
// try again.
if (knownType == null)
{
if (knownEventTypes.TryGetValue(eventTypeId, out knownType))
{
knownTypeId = eventTypeId;
eventTypeMappings.Add(eventTypeId, eventTypeId);
}
}
// try mapping it to a known type.
if (knownType == null)
{
// browse for the supertypes of the event type.
ReferenceDescriptionCollection supertypes = FormUtils.BrowseSuperTypes(session, eventTypeId, false);
// can't do anything with unknown types.
if (supertypes == null)
{
return(null);
}
// find the first supertype that matches a known event type.
for (int ii = 0; ii < supertypes.Count; ii++)
{
NodeId superTypeId = (NodeId)supertypes[ii].NodeId;
if (knownEventTypes.TryGetValue(superTypeId, out knownType))
{
knownTypeId = superTypeId;
eventTypeMappings.Add(eventTypeId, superTypeId);
}
if (knownTypeId != null)
{
break;
}
}
// can't do anything with unknown types.
if (knownTypeId == null)
{
return(null);
}
}
// construct the event based on the known event type.
BaseEventState e = (BaseEventState)Activator.CreateInstance(knownType, new object[] { (NodeState)null });
// get the filter which defines the contents of the notification.
EventFilter filter = monitoredItem.Status.Filter as EventFilter;
// initialize the event with the values in the notification.
e.Update(session.SystemContext, filter.SelectClauses, notification);
// save the orginal notification.
e.Handle = notification;
return(e);
}
/// <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( ));
}