//When a button is clicked, call this background worker private void backgroundWorker1_DoWork(object sender, System.ComponentModel.DoWorkEventArgs e) { UAEndpointDescriptor endpointDescriptor = "opc.tcp://" + PCNameTextBox.Text + ":4880/[SystemName]"; UANodeElementCollection NodeCollection = new UANodeElementCollection(); //grab the collection of nodes from our endpoint try { NodeCollection = CM100Client.Browse( endpointDescriptor, UAObjectIds.ObjectsFolder, new UABrowseParameters(UANodeClass.All, new[] { UAReferenceTypeIds.References }) ); } catch (Exception ex) { //Exception handling } RecursiveBrowse(NodeCollection, endpointDescriptor); } //Recursive function for browsing data nodes private void RecursiveBrowse(UANodeElementCollection NodeCollection, UAEndpointDescriptor endpointDescriptor) { //If it has children keep going if (NodeCollection.Count > 0) { //Next recursively get the data from each node on the OPC server. foreach (UANodeElement nodeElement in NodeCollection) { //Write to file, savepath comes from user input using (StreamWriter sw = new StreamWriter(Path.Combine(savepath, "[SystemName]ServerNodes.txt"), true)) { sw.WriteLine("DisplayName: " + nodeElement.DisplayName); //Other things written to the file here sw.WriteLine(""); } //Browse for the data nodes that are children of this one and browse deeper into the tree UANodeElementCollection NewNodeCollection = new UANodeElementCollection(); try { NewNodeCollection = NewNodeCollection = CM100Client.Browse( endpointDescriptor, nodeElement.NodeId, new UABrowseParameters(UANodeClass.All, new[] { UAReferenceTypeIds.References }) ); RecursiveBrowse(NewNodeCollection, endpointDescriptor); } catch (Exception ex) { ResultsTextBox.AppendText(Environment.NewLine + ex.ToString()); } } } else { return; } }

// Shows how to obtain references of all kinds to nodes of all classes, from the "Server" node in the address space. using System; using System.Diagnostics; using OpcLabs.EasyOpc.UA; using OpcLabs.EasyOpc.UA.AddressSpace; using OpcLabs.EasyOpc.UA.AddressSpace.Standard; using OpcLabs.EasyOpc.UA.OperationModel; namespace UADocExamples._EasyUAClient { class Browse { public static void Main1() { UAEndpointDescriptor endpointDescriptor = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer"; // or "http://opcua.demo-this.com:51211/UA/SampleServer" (not in .NET Standard) // or "https://opcua.demo-this.com:51212/UA/SampleServer/" // Instantiate the client object var client = new EasyUAClient(); // Obtain nodes under "Server" node UANodeElementCollection nodeElementCollection; try { nodeElementCollection = client.Browse( endpointDescriptor, UAObjectIds.Server, new UABrowseParameters(UANodeClass.All, new[] { UAReferenceTypeIds.References })); } catch (UAException uaException) { Console.WriteLine("*** Failure: {0}", uaException.GetBaseException().Message); return; } // Display results foreach (UANodeElement nodeElement in nodeElementCollection) { Debug.Assert(nodeElement != null); Console.WriteLine(); Console.WriteLine("nodeElement.NodeId: {0}", nodeElement.NodeId); Console.WriteLine("nodeElement.DisplayName: {0}", nodeElement.DisplayName); } } } }

//When a button is clicked, call this background worker private void backgroundWorker1_DoWork(object sender, System.ComponentModel.DoWorkEventArgs e) { UAEndpointDescriptor endpointDescriptor = "opc.tcp://" + PCNameTextBox.Text + ":4880/[SystemName]"; UANodeElementCollection NodeCollection = new UANodeElementCollection(); //grab the collection of nodes from our endpoint try { NodeCollection = EasyOPCClient.BrowseDataNodes(endpointDescriptor); } catch (Exception ex) { //Exception handling } RecursiveBrowse(NodeCollection, endpointDescriptor); } //Recursive function for browsing data nodes private void RecursiveBrowse(UANodeElementCollection NodeCollection, UAEndpointDescriptor endpointDescriptor) { //If it has children keep going if (NodeCollection.Count > 0) { //Next recursively get the data from each node on the OPC server. foreach (UANodeElement nodeElement in NodeCollection) { //Write to file, savepath comes from user input using (StreamWriter sw = new StreamWriter(Path.Combine(savepath, "[SystemName]ServerNodes.txt"), true)) { sw.WriteLine("DisplayName: " + nodeElement.DisplayName); //Other things written to the file here sw.WriteLine(""); } //Browse for the data nodes that are children of this one and browse deeper into the tree UANodeElementCollection NewNodeCollection = new UANodeElementCollection(); try { NewNodeCollection = EasyOPCClient.BrowseDataNodes(endpointDescriptor, nodeElement.NodeId); RecursiveBrowse(NewNodeCollection, endpointDescriptor); } catch (Exception ex) { ResultsTextBox.AppendText(Environment.NewLine + ex.ToString()); } } } else { return; } }