QuickOPC User's Guide and Reference
UANodeElement Class
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OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA.AddressSpace Namespace : UANodeElement Class
Contains information gathered about a node in OPC server's address space.
Object Model
UANodeElement ClassUAQualifiedName ClassUABrowsePath ClassUANodeId ClassUANodeId ClassUANodeId Class
Syntax
'Declaration
 

<ComDefaultInterfaceAttribute(OpcLabs.EasyOpc.UA.AddressSpace.ComTypes._UANodeElement)>
<ComVisibleAttribute(True)>
<DefaultPropertyAttribute("BrowseName")>
<GuidAttribute("EF28FB7A-CF19-4288-ACC3-5A87085D7ECC")>
<TypeConverterAttribute(System.ComponentModel.ExpandableObjectConverter)>
<CLSCompliantAttribute(True)>
<ValueControlAttribute("OpcLabs.BaseLib.Forms.Common.ObjectSerializationControl, OpcLabs.BaseLibForms, Version=5.72.465.1, Culture=neutral, PublicKeyToken=6faddca41dacb409", 
   DefaultReadWrite=False, 
   Export=True, 
   PageId=10001)>
<SerializableAttribute()>
Public Class UANodeElement 
   Inherits OpcLabs.BaseLib.Info
   Implements LINQPad.ICustomMemberProvider, OpcLabs.BaseLib.ComTypes._Info, OpcLabs.BaseLib.ComTypes._Object2, OpcLabs.EasyOpc.UA.AddressSpace.ComTypes._UANodeElement, IUANodeElement, System.ICloneable, System.Runtime.Serialization.ISerializable, System.Xml.Serialization.IXmlSerializable
 
'Usage
 

Dim instance As UANodeElement
Remarks
This object is filled in and returned e.g. when you browse the OPC server's address space.

 

In This Topic

Principles

In OPC Unified Architecture, the address space is composed of nodes. The nodes are interconnected by means of references. The references do not necessarily have to be hierarchical; this means that the address space does not form a tree, but it is generally an interconnected “mesh” of nodes.

Nodes are of different node classes, and each node class has a fixed set of attributes, defined in the OPC specification. References can also be of various types, and the set of reference types is extensible.

QuickOPC gives you methods to traverse through the address space information and obtain the information available there. It is also possible to filter the returned nodes by criteria such as the node classes of interest, or reference types to follow.

The address space may contain all kinds of information and various node classes and types of references. In this chapter, we will focus on browsing for node classes and reference types that are relevant for data access tasks.

There are following browse methods specialized for data access:

Other browsing methods are:

Objects (returned by the BrowseObjects method) are equivalent of folders in a file system – they provide means of organizing other nodes logically. Data variables (returned by the BrowseDataVariables method) represent a value, and clients can read the value, write the value, or subscribe to changes of the value. Properties (returned by the BrowseProperties method) represent additional characteristics of a node which is not described by its attributes. Variables (either data variables, or properties), are returned by the BrowseVariables method. The BrowseDataNodes method returns all kinds of data nodes – and we use the term data nodes for any of objects, variables, or properties.

The following picture shows the relationship between various browsing options.

If you want to retrieve a list of all nodes that can be followed from a given node (or from an Objects folder that is a default starting point for data access browsing) of the OPC server, call one of the methods listed above. You will receive back a UANodeElementCollection, which is a collection of UANodeElement objects. Each UANodeElement contains information gathered about one node that can be followed from a given node, such as its browse name, its node ID, its display name, or a type definition. The UANodeElement is convertible to UANodeDescriptor, and you can therefore pass it to methods for further browsing from that node, or to methods like Read, ReadValue, SubscribeMonitoredItem, or SubscribeDataChange.

Note: In some cases, defined by the OPC UA specification, the elements returned in the UANodeElementCollection will have unique browse names. In general, however, OPC UA allows multiple returned elements share the same browse name.

The OPC UA address space may also contain Methods. They can be used to call (invoke) a code in the OPC UA server, passing input and output arguments to/from the method. Methods available on a specified object are returned by the BrowseMethods call.

The most generic address space browsing method is the Browse Method. It allows the widest range of filtering options by passing in an argument of type UABrowseParameters.  You can specify any set of node classes, and reference type IDs, with this object.

Using the ReferenceTypeIds property in the UABrowseParameters, you can specify which references in the address space will be followed in browsing. The IncludeSubtypes flag determines whether subtypes of the specified reference type should be returned by the browsing.

Using the BrowseDirections property in the UABrowseParameters, you can specify which directions of the references the Browse method should return. The available choices are given by the UABrowseDirections enumeration, and are Forward, Inverse, and Both.

Examples

.NET

// This example shows how to obtain "data nodes" (objects, variables and properties) under the "Objects" node in the address
// space.

using System;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.AddressSpace;
using OpcLabs.EasyOpc.UA.OperationModel;

namespace UADocExamples._EasyUAClient
{
    partial class BrowseDataNodes
    {
        public static void Overload1()
        {
            UAEndpointDescriptor endpointDescriptor =
                "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer";
            // or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported)
            // or "https://opcua.demo-this.com:51212/UA/SampleServer/"

            // Instantiate the client object
            var client = new EasyUAClient();

            // Obtain data nodes under "Objects" node.
            UANodeElementCollection nodeElementCollection;
            try
            {
                nodeElementCollection = client.BrowseDataNodes(endpointDescriptor);
            }
            catch (UAException uaException)
            {
                Console.WriteLine($"*** Failure: {uaException.GetBaseException().Message}");
                return;
            }

            // Display results
            foreach (UANodeElement nodeElement in nodeElementCollection)
            {
                Console.WriteLine();
                Console.WriteLine($"nodeElement.DisplayName: {nodeElement.DisplayName}");
                Console.WriteLine($"nodeElement.NodeId: {nodeElement.NodeId}");
                Console.WriteLine($"nodeElement.NodeId.ExpandedText: {nodeElement.NodeId.ExpandedText}");
            }
        }

        // Example output:
        //
        //nodeElement.DisplayName: Server
        //nodeElement.NodeId: Server
        //nodeElement.NodeId.ExpandedText: nsu = http://opcfoundation.org/UA/ ;i=2253
        //
        //nodeElement.DisplayName: Data
        //nodeElement.NodeId: nsu = http://test.org/UA/Data/ ;ns=2;i=10157
        //nodeElement.NodeId.ExpandedText: nsu = http://test.org/UA/Data/ ;ns=2;i=10157
        //
        //nodeElement.DisplayName: Boilers
        //nodeElement.NodeId: nsu = http://opcfoundation.org/UA/Boiler/ ;ns=4;i=1240
        //nodeElement.NodeId.ExpandedText: nsu = http://opcfoundation.org/UA/Boiler/ ;ns=4;i=1240
        //
        //nodeElement.DisplayName: MemoryBuffers
        //nodeElement.NodeId: nsu = http://samples.org/UA/memorybuffer ;ns=7;i=1025
        //nodeElement.NodeId.ExpandedText: nsu = http://samples.org/UA/memorybuffer ;ns=7;i=1025
    }
}

COM

// This example shows how to obtain all data nodes (objects and variables) under a given node of the OPC-UA address space.
// For each node, it displays its browse name and node ID.

#include "stdafx.h"    // Includes "QuickOpc.h", and other commonly used files
#include "BrowseDataNodes.h"

namespace _EasyUAClient
{
    void BrowseDataNodes::Main()
    {
        // Initialize the COM library
        CoInitializeEx(NULL, COINIT_MULTITHREADED);
        {
            // Instantiate the client object
            _EasyUAClientPtr ClientPtr(__uuidof(EasyUAClient));

            // Perform the operation
            _UANodeElementCollectionPtr NodeElementsPtr = ClientPtr->BrowseDataNodes(
                //L"http://opcua.demo-this.com:51211/UA/SampleServer", 
                L"opc.tcp://opcua.demo-this.com:51210/UA/SampleServer",
                L"nsu=http://test.org/UA/Data/ ;i=10791");
    
            // Display results
            IEnumVARIANTPtr EnumNodeElementPtr = NodeElementsPtr->GetEnumerator();
            _variant_t vNodeElement;
            while (EnumNodeElementPtr->Next(1, &vNodeElement, NULL) == S_OK)
            {
                _UANodeElementPtr NodeElementPtr(vNodeElement);
                _tprintf(_T("%s: "), (LPCTSTR)CW2CT(NodeElementPtr->BrowseName->ToString));
                _tprintf(_T("%s\n"), (LPCTSTR)CW2CT(NodeElementPtr->NodeId->ToString));
                vNodeElement.Clear();
            }
        }
         // Release all interface pointers BEFORE calling CoUninitialize()
        CoUninitialize();
    }
}

 

.NET

// This example shows how to obtain nodes under a given node of the OPC-UA address space. 
// For each node, it displays its browse name and node ID.

using System;
using System.Diagnostics;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.AddressSpace;
using OpcLabs.EasyOpc.UA.Navigation.Parsing;
using OpcLabs.EasyOpc.UA.OperationModel;

namespace UADocExamples._EasyUAClient
{
    partial 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" (currently not supported)
            // or "https://opcua.demo-this.com:51212/UA/SampleServer/"

            var browsePathParser = new UABrowsePathParser("http://test.org/UA/Data/");
            UANodeDescriptor nodeDescriptor = browsePathParser.Parse("[ObjectsFolder]/Data/Static/UserScalar");

            // Instantiate the client object
            var client = new EasyUAClient();

            // perform the operation
            UANodeElementCollection nodeElementCollection;
            try
            {
                nodeElementCollection = client.Browse(
                    endpointDescriptor, 
                    nodeDescriptor, 
                    UABrowseParameters.AllForwardReferences);
            }
            catch (UAException uaException)
            {
                Console.WriteLine($"*** Failure: {uaException.GetBaseException().Message}");
                return;
            }

            // Display results
            foreach (UANodeElement nodeElement in nodeElementCollection)
            {
                Debug.Assert(!(nodeElement is null));
                Console.WriteLine($"{nodeElement.BrowseName}: {nodeElement.NodeId}");
            }
        }

        // Example output:
        //
        //BooleanValue: nsu=http://test.org/UA/Data/ ;ns=2;i=10384
        //SByteValue: nsu=http://test.org/UA/Data/ ;ns=2;i=10385
        //ByteValue: nsu=http://test.org/UA/Data/ ;ns=2;i=10386
        //Int16Value: nsu=http://test.org/UA/Data/ ;ns=2;i=10387
        //UInt16Value: nsu=http://test.org/UA/Data/ ;ns=2;i=10388
        //Int32Value: nsu=http://test.org/UA/Data/ ;ns=2;i=10389
        //UInt32Value: nsu=http://test.org/UA/Data/ ;ns=2;i=10390
        //Int64Value: nsu=http://test.org/UA/Data/ ;ns=2;i=10391
        //UInt64Value: nsu=http://test.org/UA/Data/ ;ns=2;i=10392
        //FloatValue: nsu=http://test.org/UA/Data/ ;ns=2;i=10393
        //DoubleValue: nsu=http://test.org/UA/Data/ ;ns=2;i=10394
        //StringValue: nsu=http://test.org/UA/Data/ ;ns=2;i=10395
        //DateTimeValue: nsu=http://test.org/UA/Data/ ;ns=2;i=10396
        //GuidValue: nsu=http://test.org/UA/Data/ ;ns=2;i=10397
        //ByteStringValue: nsu=http://test.org/UA/Data/ ;ns=2;i=10398
        //XmlElementValue: nsu=http://test.org/UA/Data/ ;ns=2;i=10399
        //NodeIdValue: nsu=http://test.org/UA/Data/ ;ns=2;i=10400
        //ExpandedNodeIdValue: nsu=http://test.org/UA/Data/ ;ns=2;i=10401
        //QualifiedNameValue: nsu=http://test.org/UA/Data/ ;ns=2;i=10402
        //LocalizedTextValue: nsu=http://test.org/UA/Data/ ;ns=2;i=10403
        //StatusCodeValue: nsu=http://test.org/UA/Data/ ;ns=2;i=10404
        //VariantValue: nsu=http://test.org/UA/Data/ ;ns=2;i=10405
        //SimulationActive: nsu=http://test.org/UA/Data/ ;ns=2;i=10328
        //GenerateValues: nsu=http://test.org/UA/Data/ ;ns=2;i=10329
        //CycleComplete: nsu=http://test.org/UA/Data/ ;ns=2;i=10331
        //UserScalarValueObjectType: nsu=http://test.org/UA/Data/ ;ns=2;i=9921
    }
}

COM

// This example shows how to obtain nodes under a given node of the OPC-UA address space.
// For each node, it displays its browse name and node ID.

#include "stdafx.h"    // Includes "QuickOpc.h", and other commonly used files
#include "Browse.h"

namespace _EasyUAClient
{
    void Browse::Main()
    {
        // Initialize the COM library
        CoInitializeEx(nullptr, COINIT_MULTITHREADED);
        {
            _UAEndpointDescriptorPtr EndpointDescriptorPtr(__uuidof(UAEndpointDescriptor));
            EndpointDescriptorPtr->UrlString = 
                //L"http://opcua.demo-this.com:51211/UA/SampleServer";
                L"opc.tcp://opcua.demo-this.com:51210/UA/SampleServer";

            _UANodeDescriptorPtr NodeDescriptorPtr(__uuidof(UANodeDescriptor));
            _UABrowsePathParserPtr BrowsePathParserPtr(__uuidof(UABrowsePathParser));
            BrowsePathParserPtr->DefaultNamespaceUriString = L"http://test.org/UA/Data/";
            NodeDescriptorPtr->BrowsePath = BrowsePathParserPtr->Parse(L"[ObjectsFolder]/Data/Static/UserScalar");

            _UABrowseParametersPtr BrowseParametersPtr(__uuidof(UABrowseParameters));
            BrowseParametersPtr->StandardName = L"AllForwardReferences";

            // Instantiate the client object
            _EasyUAClientPtr ClientPtr(__uuidof(EasyUAClient));

            // Perform the operation
            _UANodeElementCollectionPtr NodeElementsPtr = ClientPtr->Browse(
                static_cast<IDispatch*>(EndpointDescriptorPtr), 
                static_cast<IDispatch*>(NodeDescriptorPtr), 
                static_cast<IDispatch*>(BrowseParametersPtr));
    
            // Display results
            IEnumVARIANTPtr EnumNodeElementPtr = NodeElementsPtr->GetEnumerator();
            _variant_t vNodeElement;
            while (EnumNodeElementPtr->Next(1, &vNodeElement, nullptr) == S_OK)
            {
                const _UANodeElementPtr NodeElementPtr(vNodeElement);
                _tprintf(_T("%s: "), (LPCTSTR)CW2CT(NodeElementPtr->BrowseName->ToString));
                _tprintf(_T("%s\n"), (LPCTSTR)CW2CT(NodeElementPtr->NodeId->ToString));
                vNodeElement.Clear();
            }
        }
         // Release all interface pointers BEFORE calling CoUninitialize()
        CoUninitialize();
    }
}


// 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
{
    partial class Browse
    {
        public static void All()
        {
            UAEndpointDescriptor endpointDescriptor =
                "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer";
            // or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported)
            // 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.DisplayName: {0}", nodeElement.DisplayName);
                Console.WriteLine("nodeElement.NodeId: {0}", nodeElement.NodeId);
                Console.WriteLine("nodeElement.NodeId.ExpandedText: {0}", nodeElement.NodeId.ExpandedText);
            }
        }

        // Example output:
        //
        //nodeElement.DisplayName: ServerArray
        //nodeElement.NodeId: Server_ServerArray
        //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=2254
        //
        //nodeElement.DisplayName: NamespaceArray
        //nodeElement.NodeId: Server_NamespaceArray
        //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=2255
        //
        //nodeElement.DisplayName: ServerStatus
        //nodeElement.NodeId: Server_ServerStatus
        //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=2256
        //
        //nodeElement.DisplayName: ServiceLevel
        //nodeElement.NodeId: Server_ServiceLevel
        //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=2267
        //
        //nodeElement.DisplayName: Auditing
        //nodeElement.NodeId: Server_Auditing
        //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=2994
        //
        //nodeElement.DisplayName: ServerCapabilities
        //nodeElement.NodeId: Server_ServerCapabilities
        //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=2268
        //
        //nodeElement.DisplayName: ServerDiagnostics
        //nodeElement.NodeId: Server_ServerDiagnostics
        //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=2274
        //
        //nodeElement.DisplayName: VendorServerInfo
        //nodeElement.NodeId: Server_VendorServerInfo
        //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=2295
        //
        //nodeElement.DisplayName: ServerRedundancy
        //nodeElement.NodeId: Server_ServerRedundancy
        //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=2296
        //
        //nodeElement.DisplayName: Namespaces
        //nodeElement.NodeId: Server_Namespaces
        //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=11715
        //
        //nodeElement.DisplayName: GetMonitoredItems
        //nodeElement.NodeId: Server_GetMonitoredItems
        //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=11492
        //
        //nodeElement.DisplayName: Data
        //nodeElement.NodeId: nsu=http://test.org/UA/Data/ ;ns=2;i=10157
        //nodeElement.NodeId.ExpandedText: nsu=http://test.org/UA/Data/ ;ns=2;i=10157
        //
        //nodeElement.DisplayName: Boilers
        //nodeElement.NodeId: nsu=http://opcfoundation.org/UA/Boiler/ ;ns=4;i=1240
        //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/Boiler/ ;ns=4;i=1240
        //
        //nodeElement.DisplayName: ServerType
        //nodeElement.NodeId: ServerType
        //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=2004
    }
}

.NET

// This example shows how to obtain data variables under the "Server" node in the address space.

using System;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.AddressSpace;
using OpcLabs.EasyOpc.UA.AddressSpace.Standard;
using OpcLabs.EasyOpc.UA.OperationModel;

namespace UADocExamples._EasyUAClient
{
    class BrowseDataVariables
    {
        public static void Overload2()
        {
            UAEndpointDescriptor endpointDescriptor =
                "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer";
            // or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported)
            // or "https://opcua.demo-this.com:51212/UA/SampleServer/"

            // Instantiate the client object
            var client = new EasyUAClient();

            // Obtain data variables under "Server" node.
            UANodeElementCollection nodeElementCollection;
            try
            {
                nodeElementCollection = client.BrowseDataVariables(endpointDescriptor, UAObjectIds.Server);
            }
            catch (UAException uaException)
            {
                Console.WriteLine($"*** Failure: {uaException.GetBaseException().Message}");
                return;
            }

            // Display results
            foreach (UANodeElement nodeElement in nodeElementCollection)
            {
                Console.WriteLine();
                Console.WriteLine($"nodeElement.DisplayName: {nodeElement.DisplayName}");
                Console.WriteLine($"nodeElement.NodeId: {nodeElement.NodeId}");
                Console.WriteLine($"nodeElement.NodeId.ExpandedText: {nodeElement.NodeId.ExpandedText}");
            }
        }

        // Example output:
        //
        //nodeElement.DisplayName: ServerStatus            
        //nodeElement.NodeId: Server_ServerStatus
        //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=2256
    }
}

COM

// This example shows how to obtain data variables under the "Server" node
// in the address space.

class procedure BrowseDataVariables.Main;
var
  Client: OpcLabs_EasyOpcUA_TLB._EasyUAClient;
  Count: Cardinal;
  Element: OleVariant;
  EndpointDescriptor: string;
  NodeElement: _UANodeElement;
  NodeElementEnumerator: IEnumVariant;
  NodeElements: _UANodeElementCollection;
  ServerNodeId: _UANodeId;
begin
  EndpointDescriptor := 
    //'http://opcua.demo-this.com:51211/UA/SampleServer';
    //'https://opcua.demo-this.com:51212/UA/SampleServer/';
    'opc.tcp://opcua.demo-this.com:51210/UA/SampleServer';

  // Instantiate the client object
  Client := CoEasyUAClient.Create;

  // Obtain variables under "Server" node
  ServerNodeId := CoUANodeId.Create;
  ServerNodeId.StandardName := 'Server';
  try
    NodeElements := Client.BrowseDataVariables(EndpointDescriptor, ServerNodeId.ExpandedText);
  except
    on E: EOleException do
    begin
      WriteLn(Format('*** Failure: %s', [E.GetBaseException.Message]));
      Exit;
    end;
  end;

  // Display results
  NodeElementEnumerator := NodeElements.GetEnumerator;
  while (NodeElementEnumerator.Next(1, Element, Count) = S_OK) do
  begin
    NodeElement := IUnknown(Element) as _UANodeElement;
    WriteLn;
    WriteLn('nodeElement.NodeId: ', NodeElement.NodeId.ToString);
    WriteLn('nodeElement.NodeId.ExpandedText: ', NodeElement.NodeId.ExpandedText);
    WriteLn('nodeElement.DisplayName: ', NodeElement.DisplayName);
  end;

  // Example output:
  //
  //nodeElement.NodeId: Server_ServerStatus
  //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=2256
  //nodeElement.DisplayName: ServerStatus
end;

.NET

// This example shows how to obtain objects under the "Server" node in the address space.

using System;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.AddressSpace;
using OpcLabs.EasyOpc.UA.AddressSpace.Standard;
using OpcLabs.EasyOpc.UA.OperationModel;

namespace UADocExamples._EasyUAClient
{
    class BrowseObjects
    {
        public static void Overload2()
        {
            UAEndpointDescriptor endpointDescriptor =
                "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer";
            // or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported)
            // or "https://opcua.demo-this.com:51212/UA/SampleServer/"

            // Instantiate the client object
            var client = new EasyUAClient();

            // Obtain objects under "Server" node.
            UANodeElementCollection nodeElementCollection;
            try
            {
                nodeElementCollection = client.BrowseObjects(endpointDescriptor, UAObjectIds.Server);
            }
            catch (UAException uaException)
            {
                Console.WriteLine($"*** Failure: {uaException.GetBaseException().Message}");
                return;
            }

            // Display results
            foreach (UANodeElement nodeElement in nodeElementCollection)
            {
                Console.WriteLine();
                Console.WriteLine($"nodeElement.DisplayName: {nodeElement.DisplayName}");
                Console.WriteLine($"nodeElement.NodeId: {nodeElement.NodeId}");
                Console.WriteLine($"nodeElement.NodeId.ExpandedText: {nodeElement.NodeId.ExpandedText}");
            }
        }

        // Example output:
        //
        //nodeElement.DisplayName: ServerCapabilities
        //nodeElement.NodeId: Server_ServerCapabilities
        //nodeElement.NodeId.ExpandedText: nsu = http://opcfoundation.org/UA/ ;i=2268
        //
        //nodeElement.DisplayName: ServerDiagnostics
        //nodeElement.NodeId: Server_ServerDiagnostics
        //nodeElement.NodeId.ExpandedText: nsu = http://opcfoundation.org/UA/ ;i=2274
        //
        //nodeElement.DisplayName: VendorServerInfo
        //nodeElement.NodeId: Server_VendorServerInfo
        //nodeElement.NodeId.ExpandedText: nsu = http://opcfoundation.org/UA/ ;i=2295
        //
        //nodeElement.DisplayName: ServerRedundancy
        //nodeElement.NodeId: Server_ServerRedundancy
        //nodeElement.NodeId.ExpandedText: nsu = http://opcfoundation.org/UA/ ;i=2296
        //
        //nodeElement.DisplayName: Namespaces
        //nodeElement.NodeId: Server_Namespaces
        //nodeElement.NodeId.ExpandedText: nsu = http://opcfoundation.org/UA/ ;i=11715
    }
}

COM

// This example shows how to obtain objects under the "Server" node
// in the address space.

class procedure BrowseObjects.Main;
var
  Client: OpcLabs_EasyOpcUA_TLB._EasyUAClient;
  Count: Cardinal;
  Element: OleVariant;
  EndpointDescriptor: string;
  NodeElement: _UANodeElement;
  NodeElementEnumerator: IEnumVariant;
  NodeElements: _UANodeElementCollection;
  ServerNodeId: _UANodeId;
begin
  EndpointDescriptor := 
    //'http://opcua.demo-this.com:51211/UA/SampleServer';
    //'https://opcua.demo-this.com:51212/UA/SampleServer/';
    'opc.tcp://opcua.demo-this.com:51210/UA/SampleServer';

  // Instantiate the client object
  Client := CoEasyUAClient.Create;

  // Obtain objects under "Server" node
  ServerNodeId := CoUANodeId.Create;
  ServerNodeId.StandardName := 'Server';
  try
    NodeElements := Client.BrowseObjects(EndpointDescriptor, ServerNodeId.ExpandedText);
  except
    on E: EOleException do
    begin
      WriteLn(Format('*** Failure: %s', [E.GetBaseException.Message]));
      Exit;
    end;
  end;

  // Display results
  NodeElementEnumerator := NodeElements.GetEnumerator;
  while (NodeElementEnumerator.Next(1, Element, Count) = S_OK) do
  begin
    NodeElement := IUnknown(Element) as _UANodeElement;
    WriteLn;
    WriteLn('nodeElement.NodeId: ', NodeElement.NodeId.ToString);
    WriteLn('nodeElement.NodeId.ExpandedText: ', NodeElement.NodeId.ExpandedText);
    WriteLn('nodeElement.DisplayName: ', NodeElement.DisplayName);
  end;

  // Example output:
  //
  //nodeElement.NodeId: Server_ServerCapabilities
  //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=2268
  //nodeElement.DisplayName: ServerCapabilities
  //
  //nodeElement.NodeId: Server_ServerDiagnostics
  //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=2274
  //nodeElement.DisplayName: ServerDiagnostics
  //
  //nodeElement.NodeId: Server_VendorServerInfo
  //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=2295
  //nodeElement.DisplayName: VendorServerInfo
  //
  //nodeElement.NodeId: Server_ServerRedundancy
  //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=2296
  //nodeElement.DisplayName: ServerRedundancy
  //
  //nodeElement.NodeId: Server_Namespaces
  //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=11715
  //nodeElement.DisplayName: Namespaces

end;

.NET

// This example shows how to obtain properties under the "Server" node in the address space.

using System;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.AddressSpace;
using OpcLabs.EasyOpc.UA.AddressSpace.Standard;
using OpcLabs.EasyOpc.UA.OperationModel;

namespace UADocExamples._EasyUAClient
{
    class BrowseProperties
    {
        public static void Overload2()
        {
            UAEndpointDescriptor endpointDescriptor =
                "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer";
            // or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported)
            // or "https://opcua.demo-this.com:51212/UA/SampleServer/"

            // Instantiate the client object
            var client = new EasyUAClient();

            // Obtain properties under "Server" node.
            UANodeElementCollection nodeElementCollection;
            try
            {
                nodeElementCollection = client.BrowseProperties(endpointDescriptor, UAObjectIds.Server);
            }
            catch (UAException uaException)
            {
                Console.WriteLine($"*** Failure: {uaException.GetBaseException().Message}");
                return;
            }

            // Display results
            foreach (UANodeElement nodeElement in nodeElementCollection)
            {
                Console.WriteLine();
                Console.WriteLine($"nodeElement.DisplayName: {nodeElement.DisplayName}");
                Console.WriteLine($"nodeElement.NodeId: {nodeElement.NodeId}");
                Console.WriteLine($"nodeElement.NodeId.ExpandedText: {nodeElement.NodeId.ExpandedText}");
            }
        }

        // Example output:
        //
        //nodeElement.DisplayName: ServerArray
        //nodeElement.NodeId: Server_ServerArray
        //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=2254
        //
        //nodeElement.DisplayName: NamespaceArray
        //nodeElement.NodeId: Server_NamespaceArray
        //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=2255
        //
        //nodeElement.DisplayName: ServiceLevel
        //nodeElement.NodeId: Server_ServiceLevel
        //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=2267
        //
        //nodeElement.DisplayName: Auditing
        //nodeElement.NodeId: Server_Auditing
        //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=2994
    }
}

COM

// This example shows how to obtain properties under the "Server" node
// in the address space.

class procedure BrowseProperties.Main;
var
  Client: OpcLabs_EasyOpcUA_TLB._EasyUAClient;
  Count: Cardinal;
  Element: OleVariant;
  EndpointDescriptor: string;
  NodeElement: _UANodeElement;
  NodeElementEnumerator: IEnumVariant;
  NodeElements: _UANodeElementCollection;
  ServerNodeId: _UANodeId;
begin
  EndpointDescriptor := 
    //'http://opcua.demo-this.com:51211/UA/SampleServer';
    //'https://opcua.demo-this.com:51212/UA/SampleServer/';
    'opc.tcp://opcua.demo-this.com:51210/UA/SampleServer';

  // Instantiate the client object
  Client := CoEasyUAClient.Create;

  // Obtain properties under "Server" node
  ServerNodeId := CoUANodeId.Create;
  ServerNodeId.StandardName := 'Server';
  try
    NodeElements := Client.BrowseProperties(EndpointDescriptor, ServerNodeId.ExpandedText);
  except
    on E: EOleException do
    begin
      WriteLn(Format('*** Failure: %s', [E.GetBaseException.Message]));
      Exit;
    end;
  end;

  // Display results
  NodeElementEnumerator := NodeElements.GetEnumerator;
  while (NodeElementEnumerator.Next(1, Element, Count) = S_OK) do
  begin
    NodeElement := IUnknown(Element) as _UANodeElement;
    WriteLn;
    WriteLn('nodeElement.NodeId: ', NodeElement.NodeId.ToString);
    WriteLn('nodeElement.NodeId.ExpandedText: ', NodeElement.NodeId.ExpandedText);
    WriteLn('nodeElement.DisplayName: ', NodeElement.DisplayName);
  end;

  // Example output:
  //
  //nodeElement.NodeId: Server_ServerArray
  //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=2254
  //nodeElement.DisplayName: ServerArray
  //
  //nodeElement.NodeId: Server_NamespaceArray
  //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=2255
  //nodeElement.DisplayName: NamespaceArray
  //
  //nodeElement.NodeId: Server_ServiceLevel
  //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=2267
  //nodeElement.DisplayName: ServiceLevel
  //
  //nodeElement.NodeId: Server_Auditing
  //nodeElement.NodeId.ExpandedText: nsu=http://opcfoundation.org/UA/ ;i=2994
  //nodeElement.DisplayName: Auditing

end;

.NET

// This example shows how to obtain all method nodes under a given node of the OPC-UA address space.
// For each node, it displays its browse name and node ID.

using System;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.AddressSpace;
using OpcLabs.EasyOpc.UA.OperationModel;

namespace UADocExamples._EasyUAClient
{
    class BrowseMethods
    {
        public static void Overload2()
        {
            UAEndpointDescriptor endpointDescriptor =
                "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer";
            // or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported)
            // or "https://opcua.demo-this.com:51212/UA/SampleServer/"

            // Instantiate the client object
            var client = new EasyUAClient();

            // Obtain methods under the specified node.
            UANodeElementCollection nodeElementCollection;
            try
            {
                nodeElementCollection = client.BrowseMethods(endpointDescriptor, "nsu=http://test.org/UA/Data/ ;i=10755");
            }
            catch (UAException uaException)
            {
                Console.WriteLine($"*** Failure: {uaException.GetBaseException().Message}");
                return;
            }

            // Display results
            foreach (UANodeElement nodeElement in nodeElementCollection)
                Console.WriteLine($"{nodeElement.BrowseName}: {nodeElement.NodeId}");
        }

        // Example output:
        //ScalarMethod1: nsu = http://test.org/UA/Data/ ;ns=2;i=10756
        //ScalarMethod2: nsu = http://test.org/UA/Data/ ;ns=2;i=10759
        //ScalarMethod3: nsu = http://test.org/UA/Data/ ;ns=2;i=10762
        //ArrayMethod1: nsu = http://test.org/UA/Data/ ;ns=2;i=10765
        //ArrayMethod2: nsu = http://test.org/UA/Data/ ;ns=2;i=10768
        //ArrayMethod3: nsu = http://test.org/UA/Data/ ;ns=2;i=10771
        //UserScalarMethod1: nsu = http://test.org/UA/Data/ ;ns=2;i=10774
        //UserScalarMethod2: nsu = http://test.org/UA/Data/ ;ns=2;i=10777
        //UserArrayMethod1: nsu = http://test.org/UA/Data/ ;ns=2;i=10780
        //UserArrayMethod2: nsu = http://test.org/UA/Data/ ;ns=2;i=10783
    }
}

COM

// This example shows how to obtain all method nodes under a given node of the OPC-UA address space.
// For each node, it displays its browse name and node ID.

#include "stdafx.h"    // Includes "QuickOpc.h", and other commonly used files
#include "BrowseMethods.h"

namespace _EasyUAClient
{
    void BrowseMethods::Main()
    {
        // Initialize the COM library
        CoInitializeEx(NULL, COINIT_MULTITHREADED);
        {
            // Instantiate the client object
            _EasyUAClientPtr ClientPtr(__uuidof(EasyUAClient));

            // Perform the operation
            _UANodeElementCollectionPtr NodeElementsPtr = ClientPtr->BrowseMethods(
                //L"http://opcua.demo-this.com:51211/UA/SampleServer", 
                L"opc.tcp://opcua.demo-this.com:51210/UA/SampleServer",
                L"nsu=http://test.org/UA/Data/ ;i=10755");
    
            // Display results
            IEnumVARIANTPtr EnumNodeElementPtr = NodeElementsPtr->GetEnumerator();
            _variant_t vNodeElement;
            while (EnumNodeElementPtr->Next(1, &vNodeElement, NULL) == S_OK)
            {
                _UANodeElementPtr NodeElementPtr(vNodeElement);
                _tprintf(_T("%s: "), (LPCTSTR)CW2CT(NodeElementPtr->BrowseName->ToString));
                _tprintf(_T("%s\n"), (LPCTSTR)CW2CT(NodeElementPtr->NodeId->ToString));
                vNodeElement.Clear();
            }
        }
         // Release all interface pointers BEFORE calling CoUninitialize()
        CoUninitialize();
    }
}

More Examples

// This example shows how to obtain "data nodes" under the "Objects" node, recursively.

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
{
    partial class BrowseDataNodes
    {
        public static void Recursive()
        {
            UAEndpointDescriptor endpointDescriptor =
                "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer";
            // or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported)
            // or "https://opcua.demo-this.com:51212/UA/SampleServer/"

            // Instantiate the client object
            var client = new EasyUAClient();

            try
            {
                BrowseFromNode(client, endpointDescriptor, UAObjectIds.ObjectsFolder, level:0);
            }
            catch (UAException uaException)
            {
                Console.WriteLine($"*** Failure: {uaException.GetBaseException().Message}");
            }
        }

        private static void BrowseFromNode(
            EasyUAClient client,
            UAEndpointDescriptor endpointDescriptor,
            UANodeDescriptor parentNodeDescriptor,
            int level)
        {
            Debug.Assert(!(client is null));
            Debug.Assert(!(endpointDescriptor is null));
            Debug.Assert(!(parentNodeDescriptor is null));

            // Obtain all node elements under parentNodeDescriptor
            UANodeElementCollection nodeElementCollection = 
                client.BrowseDataNodes(endpointDescriptor, parentNodeDescriptor);
            // Remark: BrowseDataNodes(...) may throw UAException; we handle it in the calling method.

            foreach (UANodeElement nodeElement in nodeElementCollection)
            {
                Debug.Assert(!(nodeElement is null));

                Console.Write(new string(' ', level*2));    // indent
                Console.WriteLine(nodeElement);

                // Browse recursively into the node.
                // The UANodeElement has an implicit conversion to UANodeDescriptor.
                BrowseFromNode(client, endpointDescriptor, nodeElement, level + 1);

                // Note that the number of nodes you obtain through recursive browsing may be very large, or even infinite.
                // Production code should contain appropriate safeguards for these cases.
            }
        }


        // Example output:
        //
        //ServerStatus -> nsu=http://opcfoundation.org/UA/ ;i=2256 (Variable) 
        //  StartTime -> nsu=http://opcfoundation.org/UA/ ;i=2257 (Variable) 
        //  CurrentTime -> nsu=http://opcfoundation.org/UA/ ;i=2258 (Variable) 
        //  State -> nsu=http://opcfoundation.org/UA/ ;i=2259 (Variable) 
        //  BuildInfo -> nsu=http://opcfoundation.org/UA/ ;i=2260 (Variable) 
        //    ProductUri -> nsu=http://opcfoundation.org/UA/ ;i=2262 (Variable) 
        //    ManufacturerName -> nsu=http://opcfoundation.org/UA/ ;i=2263 (Variable) 
        //    ProductName -> nsu=http://opcfoundation.org/UA/ ;i=2261 (Variable) 
        //    SoftwareVersion -> nsu=http://opcfoundation.org/UA/ ;i=2264 (Variable) 
        //    BuildNumber -> nsu=http://opcfoundation.org/UA/ ;i=2265 (Variable) 
        //    BuildDate -> nsu=http://opcfoundation.org/UA/ ;i=2266 (Variable) 
        //  SecondsTillShutdown -> nsu=http://opcfoundation.org/UA/ ;i=2992 (Variable) 
        //  ShutdownReason -> nsu=http://opcfoundation.org/UA/ ;i=2993 (Variable) 
        //ServerCapabilities -> nsu=http://opcfoundation.org/UA/ ;i=2268 (Object) 
        //  OperationLimits -> nsu=http://opcfoundation.org/UA/ ;i=11704 (Object) 
        //    MaxNodesPerRead -> nsu=http://opcfoundation.org/UA/ ;i=11705 (Variable) 
        //    MaxNodesPerHistoryReadData -> nsu=http://opcfoundation.org/UA/ ;i=12165 (Variable) 
        //    MaxNodesPerHistoryReadEvents -> nsu=http://opcfoundation.org/UA/ ;i=12166 (Variable) 
        //    MaxNodesPerWrite -> nsu=http://opcfoundation.org/UA/ ;i=11707 (Variable) 
        //    MaxNodesPerHistoryUpdateData -> nsu=http://opcfoundation.org/UA/ ;i=12167 (Variable) 
        //...
    }
}

 

 

Example

.NET

.NET

// This example shows how to obtain "data nodes" (objects, variables and properties) under the "Objects" node in the address
// space.

using System;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.AddressSpace;
using OpcLabs.EasyOpc.UA.OperationModel;

namespace UADocExamples._EasyUAClient
{
    partial class BrowseDataNodes
    {
        public static void Overload1()
        {
            UAEndpointDescriptor endpointDescriptor =
                "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer";
            // or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported)
            // or "https://opcua.demo-this.com:51212/UA/SampleServer/"

            // Instantiate the client object
            var client = new EasyUAClient();

            // Obtain data nodes under "Objects" node.
            UANodeElementCollection nodeElementCollection;
            try
            {
                nodeElementCollection = client.BrowseDataNodes(endpointDescriptor);
            }
            catch (UAException uaException)
            {
                Console.WriteLine($"*** Failure: {uaException.GetBaseException().Message}");
                return;
            }

            // Display results
            foreach (UANodeElement nodeElement in nodeElementCollection)
            {
                Console.WriteLine();
                Console.WriteLine($"nodeElement.DisplayName: {nodeElement.DisplayName}");
                Console.WriteLine($"nodeElement.NodeId: {nodeElement.NodeId}");
                Console.WriteLine($"nodeElement.NodeId.ExpandedText: {nodeElement.NodeId.ExpandedText}");
            }
        }

        // Example output:
        //
        //nodeElement.DisplayName: Server
        //nodeElement.NodeId: Server
        //nodeElement.NodeId.ExpandedText: nsu = http://opcfoundation.org/UA/ ;i=2253
        //
        //nodeElement.DisplayName: Data
        //nodeElement.NodeId: nsu = http://test.org/UA/Data/ ;ns=2;i=10157
        //nodeElement.NodeId.ExpandedText: nsu = http://test.org/UA/Data/ ;ns=2;i=10157
        //
        //nodeElement.DisplayName: Boilers
        //nodeElement.NodeId: nsu = http://opcfoundation.org/UA/Boiler/ ;ns=4;i=1240
        //nodeElement.NodeId.ExpandedText: nsu = http://opcfoundation.org/UA/Boiler/ ;ns=4;i=1240
        //
        //nodeElement.DisplayName: MemoryBuffers
        //nodeElement.NodeId: nsu = http://samples.org/UA/memorybuffer ;ns=7;i=1025
        //nodeElement.NodeId.ExpandedText: nsu = http://samples.org/UA/memorybuffer ;ns=7;i=1025
    }
}
// This example shows how to obtain "data nodes" under the "Objects" node, recursively.

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
{
    partial class BrowseDataNodes
    {
        public static void Recursive()
        {
            UAEndpointDescriptor endpointDescriptor =
                "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer";
            // or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported)
            // or "https://opcua.demo-this.com:51212/UA/SampleServer/"

            // Instantiate the client object
            var client = new EasyUAClient();

            try
            {
                BrowseFromNode(client, endpointDescriptor, UAObjectIds.ObjectsFolder, level:0);
            }
            catch (UAException uaException)
            {
                Console.WriteLine($"*** Failure: {uaException.GetBaseException().Message}");
            }
        }

        private static void BrowseFromNode(
            EasyUAClient client,
            UAEndpointDescriptor endpointDescriptor,
            UANodeDescriptor parentNodeDescriptor,
            int level)
        {
            Debug.Assert(!(client is null));
            Debug.Assert(!(endpointDescriptor is null));
            Debug.Assert(!(parentNodeDescriptor is null));

            // Obtain all node elements under parentNodeDescriptor
            UANodeElementCollection nodeElementCollection = 
                client.BrowseDataNodes(endpointDescriptor, parentNodeDescriptor);
            // Remark: BrowseDataNodes(...) may throw UAException; we handle it in the calling method.

            foreach (UANodeElement nodeElement in nodeElementCollection)
            {
                Debug.Assert(!(nodeElement is null));

                Console.Write(new string(' ', level*2));    // indent
                Console.WriteLine(nodeElement);

                // Browse recursively into the node.
                // The UANodeElement has an implicit conversion to UANodeDescriptor.
                BrowseFromNode(client, endpointDescriptor, nodeElement, level + 1);

                // Note that the number of nodes you obtain through recursive browsing may be very large, or even infinite.
                // Production code should contain appropriate safeguards for these cases.
            }
        }


        // Example output:
        //
        //ServerStatus -> nsu=http://opcfoundation.org/UA/ ;i=2256 (Variable) 
        //  StartTime -> nsu=http://opcfoundation.org/UA/ ;i=2257 (Variable) 
        //  CurrentTime -> nsu=http://opcfoundation.org/UA/ ;i=2258 (Variable) 
        //  State -> nsu=http://opcfoundation.org/UA/ ;i=2259 (Variable) 
        //  BuildInfo -> nsu=http://opcfoundation.org/UA/ ;i=2260 (Variable) 
        //    ProductUri -> nsu=http://opcfoundation.org/UA/ ;i=2262 (Variable) 
        //    ManufacturerName -> nsu=http://opcfoundation.org/UA/ ;i=2263 (Variable) 
        //    ProductName -> nsu=http://opcfoundation.org/UA/ ;i=2261 (Variable) 
        //    SoftwareVersion -> nsu=http://opcfoundation.org/UA/ ;i=2264 (Variable) 
        //    BuildNumber -> nsu=http://opcfoundation.org/UA/ ;i=2265 (Variable) 
        //    BuildDate -> nsu=http://opcfoundation.org/UA/ ;i=2266 (Variable) 
        //  SecondsTillShutdown -> nsu=http://opcfoundation.org/UA/ ;i=2992 (Variable) 
        //  ShutdownReason -> nsu=http://opcfoundation.org/UA/ ;i=2993 (Variable) 
        //ServerCapabilities -> nsu=http://opcfoundation.org/UA/ ;i=2268 (Object) 
        //  OperationLimits -> nsu=http://opcfoundation.org/UA/ ;i=11704 (Object) 
        //    MaxNodesPerRead -> nsu=http://opcfoundation.org/UA/ ;i=11705 (Variable) 
        //    MaxNodesPerHistoryReadData -> nsu=http://opcfoundation.org/UA/ ;i=12165 (Variable) 
        //    MaxNodesPerHistoryReadEvents -> nsu=http://opcfoundation.org/UA/ ;i=12166 (Variable) 
        //    MaxNodesPerWrite -> nsu=http://opcfoundation.org/UA/ ;i=11707 (Variable) 
        //    MaxNodesPerHistoryUpdateData -> nsu=http://opcfoundation.org/UA/ ;i=12167 (Variable) 
        //...
    }
}
Inheritance Hierarchy

System.Object
   OpcLabs.BaseLib.Object2
      OpcLabs.BaseLib.Info
         OpcLabs.EasyOpc.UA.AddressSpace.UANodeElement
            OpcLabs.EasyOpc.UA.Graphs.UANodeTreePosition

Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2016, Windows Server 2022; .NET: Linux, macOS, Microsoft Windows

See Also

Reference

UANodeElement Members
OpcLabs.EasyOpc.UA.AddressSpace Namespace

 

 

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