RegisterToGds Method (_EasyUAClientApplication)

Creates an application registration in the GDS, assigning it a new application ID. Existing registrations with the same application URI are removed first.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
<NotNullAttribute()>
Function RegisterToGds( _
   ByVal gdsEndpointDescriptor As Object _
) As UANodeId

'Usage
 
Dim instance As _EasyUAClientApplication
Dim gdsEndpointDescriptor As Object
Dim value As UANodeId
 
value = instance.RegisterToGds(gdsEndpointDescriptor)

[NotNull()]
UANodeId RegisterToGds( 
   object gdsEndpointDescriptor
)

[NotNull()]
UANodeId^ RegisterToGds( 
   Object^ gdsEndpointDescriptor
)

Parameters

gdsEndpointDescriptor: The endpoint of OPC UA Global Discovery Server (GDS).

Return Value

Returns the new application ID.

Exceptions

Exception	Description
System.ArgumentNullException	A `null` reference (`Nothing` in Visual Basic) is passed to a method that does not accept it as a valid argument.
OpcLabs.EasyOpc.UA.OperationModel.UAException	The OPC UA operation has failed.
System.Exception	An error has occurred during method execution.

Remarks

The difference between the RegisterToGds and UpdateGdsRegistration methods is that the RegisterToGds method always obtains a new application ID, whereas the UpdateGdsRegistration method attempts to reuse the existing application ID, if known. Neither of these methods requires the GDS registration be in any particular state for it to succeed, and both methods assure that after a successful execution, there is one and only one registration in the given GDS for this application.

The identity of the application itself is carried by its application URI, as given by the OpcLabs.EasyOpc.UA.Discovery.UAApplicationElement.ApplicationUriString returned by the OpcLabs.EasyOpc.UA.Application.Extensions.IEasyUAApplicationExtension.GetApplicationElement. Methods on this interface that manipulate or inspect the GDS registration use the application URI to identify the registration records belonging to this application.

Example

CSharp
Object Pascal
PHP
VB.NET

// Shows how to create an application registration in the GDS, assigning it a new application ID.

using System;
using Microsoft.Extensions.DependencyInjection;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.AddressSpace;
using OpcLabs.EasyOpc.UA.Application;
using OpcLabs.EasyOpc.UA.Application.Extensions;
using OpcLabs.EasyOpc.UA.Extensions;
using OpcLabs.EasyOpc.UA.OperationModel;

namespace UADocExamples.Application._IEasyUAClientApplication
{
    class RegisterToGds
    {
        public static void Main1()
        {
            // Define which GDS we will work with.
            UAEndpointDescriptor gdsEndpointDescriptor =
                ((UAEndpointDescriptor)"opc.tcp://opcua.demo-this.com:58810/GlobalDiscoveryServer")
                .WithUserNameIdentity("appadmin", "demo");

            // Obtain the client application service.
            var client = new EasyUAClient();
            IEasyUAClientApplication clientApplication = client.GetService<IEasyUAClientApplication>();

            // Display which application we are about to work with.
            Console.WriteLine("Application URI string: {0}",
                clientApplication.GetApplicationElement().ApplicationUriString);

            // Create an application registration in the GDS, assigning it a new application ID.
            UANodeId applicationId;
            try
            {
                applicationId = clientApplication.RegisterToGds(gdsEndpointDescriptor);
            }
            catch (UAException uaException)
            {
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException().Message);
                return;
            }

            // Display results
            Console.WriteLine("Application ID: {0}", applicationId);
        }
    }
}

// Shows how to create an application registration in the GDS, assigning it a new application ID.

class procedure RegisterToGds.Main;
var
  ApplicationId: _UANodeId;
  Client: _EasyUAClient;
  ClientApplication: _EasyUAClientApplication;
  GdsEndpointDescriptor: _UAEndpointDescriptor;
begin
  // Define which GDS we will work with.
  GdsEndpointDescriptor := CoUAEndpointDescriptor.Create;
  GdsEndpointDescriptor.UrlString := 'opc.tcp://opcua.demo-this.com:58810/GlobalDiscoveryServer';
  GdsEndpointDescriptor.UserIdentity.UserNameTokenInfo.UserName := 'appadmin';
  GdsEndpointDescriptor.UserIdentity.UserNameTokenInfo.Password := 'demo';

  // Obtain the client application service.
  Client := CoEasyUAClient.Create;
  ClientApplication := IInterface(Client.GetServiceByName('OpcLabs.EasyOpc.UA.Application.IEasyUAClientApplication, OpcLabs.EasyOpcUA')) as _EasyUAClientApplication;

  // Display which application we are about to work with.
  WriteLn('Application URI string: ', ClientApplication.GetApplicationElement.ApplicationUriString);

  // Create an application registration in the GDS, assigning it a new application ID.
  try
    ApplicationId := ClientApplication.RegisterToGds(gdsEndpointDescriptor);
  except
    on E: EOleException do
    begin
      WriteLn(Format('*** Failure: %s', [E.GetBaseException.Message]));
    end;
  end;

  // Display results
  WriteLn('Application ID: ', ApplicationId.ToString);
end;

// Shows how to create an application registration in the GDS, assigning it a new application ID.

// Define which GDS we will work with.
$GdsEndpointDescriptor = new COM("OpcLabs.EasyOpc.UA.UAEndpointDescriptor");
$GdsEndpointDescriptor->UrlString = "opc.tcp://opcua.demo-this.com:58810/GlobalDiscoveryServer";
$GdsEndpointDescriptor->UserIdentity->UserNameTokenInfo->UserName = "appadmin";
$GdsEndpointDescriptor->UserIdentity->UserNameTokenInfo->Password = "demo";

// Obtain the client application service.
$Client = new COM("OpcLabs.EasyOpc.UA.EasyUAClient");
$ClientApplication = $Client->GetServiceByName("OpcLabs.EasyOpc.UA.Application.IEasyUAClientApplication, OpcLabs.EasyOpcUA");

// Display which application we are about to work with.
printf("Application URI string: %s\n", $ClientApplication->GetApplicationElement->ApplicationUriString);

// Create an application registration in the GDS, assigning it a new application ID.
try
{
    $ApplicationId = $ClientApplication->RegisterToGds($GdsEndpointDescriptor);
}
catch (com_exception $e)
{
    printf("*** Failure: %s\n", $e->getMessage());
    exit();
}

// Display results
printf("Application ID: %s\n", $ApplicationId);

' Shows how to create an application registration in the GDS, assigning it a new application ID.

Imports Microsoft.Extensions.DependencyInjection
Imports OpcLabs.EasyOpc.UA
Imports OpcLabs.EasyOpc.UA.AddressSpace
Imports OpcLabs.EasyOpc.UA.Application
Imports OpcLabs.EasyOpc.UA.Application.Extensions
Imports OpcLabs.EasyOpc.UA.Extensions
Imports OpcLabs.EasyOpc.UA.OperationModel

Namespace UADocExamples.Application._IEasyUAClientApplication
    Friend Class RegisterToGds
        Public Shared Sub Main1()

            ' Define which GDS we will work with.
            Dim gdsEndpointDescriptor As UAEndpointDescriptor =
                New UAEndpointDescriptor("opc.tcp://opcua.demo-this.com:58810/GlobalDiscoveryServer") _
                .WithUserNameIdentity("appadmin", "demo")

            ' Obtain the client application service.
            Dim client = New EasyUAClient()
            Dim clientApplication = client.GetService(Of IEasyUAClientApplication)()

            ' Display which application we are about to work with.
            Console.WriteLine("Application URI string: {0}",
                clientApplication.GetApplicationElement().ApplicationUriString)

            ' Create an application registration in the GDS, assigning it a new application ID.
            Dim applicationId As UANodeId
            Try
                applicationId = clientApplication.RegisterToGds(gdsEndpointDescriptor)
            Catch uaException As UAException
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException.Message)
                Exit Sub
            End Try

            ' Display results
            Console.WriteLine("Application ID: {0}", applicationId)
        End Sub
    End Class
End Namespace

Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2012 R2, Windows Server 2016; .NET Core, .NET 6: Linux, macOS, Microsoft Windows

Reference

_EasyUAClientApplication Interface
_EasyUAClientApplication Members

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