public List <ReferenceDescription> Browse(Session session, NodeId nodeId)
{
BrowseContext context = new BrowseContext();
context.BrowseDirection = BrowseDirection.Forward;
context.ReferenceTypeId = ReferenceTypeIds.HierarchicalReferences;
context.IncludeSubtypes = true;
context.MaxReferencesToReturn = 0;
byte[] continuationPoint = null;
List <ReferenceDescription> references = session.Browse(nodeId, context, new RequestSettings()
{
OperationTimeout = 10000
}, out continuationPoint);
List <ReferenceDescription> ret = new List <ReferenceDescription>();
foreach (ReferenceDescription reference in references)
{
ret.Add(reference);
}
// process any continuation points.
while (!ByteString.IsNull(continuationPoint))
{
references = session.BrowseNext(new RequestSettings()
{
OperationTimeout = 10000
}, ref continuationPoint);
foreach (ReferenceDescription reference in references)
{
ret.Add(reference);
}
}
return(ret);
}
private RemoteHelper(OpcUaSession session)
{
_session = session;
_parentNode = null;
_browseContext = new BrowseContext
{
BrowseDirection = BrowseDirection.Forward,
ReferenceTypeId = ReferenceTypeIds.HierarchicalReferences,
IncludeSubtypes = true,
MaxReferencesToReturn = 0
};
_session.ConnectionStatusUpdate += SessionOnConnectionStatusUpdate;
}
protected List <ReferenceDescription> BrowseFolder(NodeId FolderNodeId)
{
var nodeReferences = new List <ReferenceDescription>();
try
{
if (_session == null)
{
return(nodeReferences);
}
BrowseContext context = new BrowseContext
{
BrowseDirection = BrowseDirection.Forward,
ReferenceTypeId = ReferenceTypeIds.Organizes,
MaxReferencesToReturn = MAX_NODES_TO_RETURN,
IncludeSubtypes = true
};
//byte[] continuationPoint = null;
nodeReferences = _session.Browse(
FolderNodeId,
context,
new RequestSettings {
OperationTimeout = 10 * SECONDS
},
out byte[] continuationPoint);
}
catch (Exception exception)
{
log.Error("Error in BrowseFolder", exception);
}
return(nodeReferences);
}
/// <summary>
/// Call the Browse service of an UA server.
/// </summary>
/// <param name="parentNode">The node of the treeview to browse.</param>
public int Browse(TreeNode parentNode)
{
NodeId nodeToBrowse = null;
TreeNodeCollection parentCollection = null;
int ret = 0;
// Check if we browse from root
if (parentNode == null)
{
nodeToBrowse = new NodeId(Objects.RootFolder, 0);
// Get all the tree nodes that are assigned to the control
parentCollection = tvBrowseTree.Nodes;
}
else
{
// Get the data about the parent tree node
ReferenceDescription parentRefDescription = (ReferenceDescription)parentNode.Tag;
if (parentRefDescription == null)
{
return(-1);
}
// XXX ToDo
// set nodeid
nodeToBrowse = ExpandedNodeId.ToNodeId(parentRefDescription.NodeId, Session.NamespaceUris);
parentCollection = parentNode.Nodes;
}
bool bBrowse;
// Set wait cursor.
Cursor.Current = Cursors.WaitCursor;
// Check if we want to browse on the server.
if (m_RebrowseOnExpandNode)
{
bBrowse = true;
}
else if (parentNode == null)
{
bBrowse = true;
}
else if (parentNode.Checked)
{
bBrowse = false;
}
else
{
bBrowse = true;
}
// Delete children if required.
if (bBrowse)
{
if (parentNode == null)
{
BrowseTree.BeginUpdate();
BrowseTree.Nodes.Clear();
BrowseTree.EndUpdate();
}
else
{
BrowseTree.BeginUpdate();
parentNode.Nodes.Clear();
BrowseTree.EndUpdate();
}
byte[] continuationPoint;
List <ReferenceDescription> results;
BrowseContext browseContext = new BrowseContext()
{
BrowseDirection = BrowseDirection.Forward,
ReferenceTypeId = UnifiedAutomation.UaBase.ReferenceTypeIds.HierarchicalReferences,
IncludeSubtypes = true,
NodeClassMask = 0,
ResultMask = (uint)BrowseResultMask.All,
MaxReferencesToReturn = 100
};
try
{
// Call browse service.
results = m_Session.Browse(
nodeToBrowse,
browseContext,
out continuationPoint);
// Add children.
tvBrowseTree.BeginUpdate();
// Mark parent node as browsed.
if (parentNode != null)
{
parentNode.Checked = true;
}
AddResultsToTree(parentCollection, results);
while (continuationPoint != null)
{
results = m_Session.BrowseNext(ref continuationPoint);
AddResultsToTree(parentCollection, results);
}
// Sort the tree nodes of the particular node collection
this.SortTreeNode((parentNode == null) ? tvBrowseTree.Nodes : parentNode.Nodes);
tvBrowseTree.EndUpdate();
// Update status label.
OnUpdateStatusLabel("Browse succeeded.", true);
}
catch (Exception e)
{
ret = -1;
// Update status label.
OnUpdateStatusLabel("An exception occured while browsing: " + e.Message, false);
}
}
// Restore default cursor.
Cursor.Current = Cursors.Default;
return(ret);
}
