public static TranslateBrowsePaths ( Session session, NodeId startNodeId, NamespaceTable namespacesUris ) : List |
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session | Session | An open session with the server to use. |
startNodeId | NodeId | The starting node for the relative paths. |
namespacesUris | NamespaceTable | The namespace URIs referenced by the relative paths. |
return | List |
/// <summary> /// Reads the application description from the GDS. /// </summary> private ApplicationDescription Read(NodeId nodeId) { NamespaceTable wellKnownNamespaceUris = new NamespaceTable(); wellKnownNamespaceUris.Append(Namespaces.OpcUaGds); string[] browsePaths = new string[] { "1:ApplicationName", "1:ApplicationType", "1:ApplicationUri", "1:ProductUri", "1:GatewayServerUri", "1:DiscoveryUrls" }; List <NodeId> propertyIds = ClientUtils.TranslateBrowsePaths( ServerCTRL.Session, nodeId, wellKnownNamespaceUris, browsePaths); ReadValueIdCollection nodesToRead = new ReadValueIdCollection(); foreach (NodeId propertyId in propertyIds) { ReadValueId nodeToRead = new ReadValueId(); nodeToRead.NodeId = propertyId; nodeToRead.AttributeId = Attributes.Value; nodesToRead.Add(nodeToRead); } DataValueCollection results = null; DiagnosticInfoCollection diagnosticInfos = null; ServerCTRL.Session.Read( null, 0, TimestampsToReturn.Neither, nodesToRead, out results, out diagnosticInfos); ClientBase.ValidateResponse(results, nodesToRead); ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToRead); ApplicationDescription application = new ApplicationDescription(); application.ApplicationName = results[0].GetValue <LocalizedText>(null); application.ApplicationType = (ApplicationType)results[1].GetValue <int>((int)ApplicationType.Server); application.ApplicationUri = results[2].GetValue <string>(null); application.ProductUri = results[3].GetValue <string>(null); application.GatewayServerUri = results[4].GetValue <string>(null); string[] discoveryUrls = results[5].GetValue <string[]>(null); if (discoveryUrls != null) { application.DiscoveryUrls = new StringCollection(discoveryUrls); } return(application); }
/// <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); } }