#pragma warning disable CS1998 // Async method lacks 'await' operators and will run synchronously
public async Task <OpcObject> InitializeTree()
#pragma warning restore CS1998 // Async method lacks 'await' operators and will run synchronously
{
var opcNode = new OpcObject();
this.ExpandTree(opcNode);
return(opcNode);
}
public void ExpandTree(OpcObject parent)
{
NodeId nodeId;
if (parent.IsExtended)
{
return;
}
if (parent.Key != "$")
{
nodeId = ExpandedNodeId.ToNodeId(parent.ExpandedNodeId, this.session.NamespaceUris);
}
else
{
nodeId = ObjectIds.ObjectsFolder;
}
ReferenceDescriptionCollection refs;
Byte[] cp;
Browse(
nodeId,
(uint)NodeClass.Variable | (uint)NodeClass.Object,
out refs,
out cp);
foreach (var rd in refs)
{
ReferenceDescriptionCollection nextRefs;
byte[] nextCp;
if (rd.NodeClass == NodeClass.Object)
{
Browse(
ExpandedNodeId.ToNodeId(rd.NodeId, session.NamespaceUris),
(uint)NodeClass.Object,
out nextRefs,
out nextCp);
var obj = new OpcObject
{
Key = rd.DisplayName.ToString(),
ExpandedNodeId = rd.NodeId,
};
if (!nextRefs.Any())
{
obj.HasChildren = false;
}
parent.Children.Add(obj);
}
else
{
var node = ExpandedNodeId.ToNodeId(rd.NodeId, session.NamespaceUris);
DataValue nodeValue = this.session.ReadValue(node);
var obj = new OpcValue
{
Key = rd.DisplayName.ToString(),
Value = nodeValue.Value as double?,
ExpandedNodeId = rd.NodeId,
};
parent.Values.Add(obj);
}
}
parent.IsExtended = true;
}