IEasyUAClientServerApplication Interface

Allows management of the OPC UA client or server application.

Object Model

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
<ComVisibleAttribute(False)>
<ExceptionContractVerificationAttribute(True)>
Public Interface IEasyUAClientServerApplication

'Usage
 
Dim instance As IEasyUAClientServerApplication

[ComVisible(false)]
[ExceptionContractVerification(true)]
public interface IEasyUAClientServerApplication

[ComVisible(false)]
[ExceptionContractVerification(true)]
public interface class IEasyUAClientServerApplication

Remarks

This service has high-level properties and methods for tasks related to maintaining application registrations in the GDS servers, obtaining own certificate from GDS, refreshing application trust lists from GDS, etc.

You can obtain this interface by calling System.IServiceProvider.GetService(System.Type) on the OpcLabs.EasyOpc.UA.IEasyUAClient with the type of IEasyUAClientServerApplication as an argument. In COM, use the OpcLabs.EasyOpc.UA.ComTypes._EasyUAClient.GetServiceByName method instead.

Example

.NET

COM

.NET

// Shows how to obtain a new application certificate from the certificate manager (GDS), and store it for subsequent usage.
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .

using System;
using OpcLabs.BaseLib.Security.Cryptography.PkiCertificates;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.Application;
using OpcLabs.EasyOpc.UA.Application.Extensions;
using OpcLabs.EasyOpc.UA.Extensions;
using OpcLabs.EasyOpc.UA.OperationModel;

namespace UADocExamples.Application._IEasyUAClientServerApplication
{
    partial class ObtainNewCertificate
    {
        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 application interface.
            EasyUAApplication application = EasyUAApplication.Instance;

            // Display which application we are about to work with.
            Console.WriteLine("Application URI string: {0}",
                application.GetApplicationElement().ApplicationUriString);
            
            // Obtain a new application certificate from the certificate manager (GDS), and store it for subsequent usage.
            IPkiCertificate certificate;
            try
            {
                certificate = application.ObtainNewCertificate(gdsEndpointDescriptor);
            }
            catch (UAException uaException)
            {
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException().Message);
                return;
            }

            // Display results
            Console.WriteLine("Certificate: {0}", certificate);
        }
    }
}

# Shows how to obtain a new application certificate from the certificate manager (GDS), and store it for subsequent
# usage.
#
# Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
# OPC client and subscriber examples in Python on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-Python .
# The QuickOPC package is needed. Install it using "pip install opclabs_quickopc".
import opclabs_quickopc

# Import .NET namespaces.
from OpcLabs.EasyOpc.UA import *
from OpcLabs.EasyOpc.UA.Application import *
from OpcLabs.EasyOpc.UA.Application.Extensions import *
from OpcLabs.EasyOpc.UA.Extensions import *
from OpcLabs.EasyOpc.UA.OperationModel import *


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

# Obtain the application interface.
application = EasyUAApplication.Instance

# Display which application we are about to work with.
applicationElement = IEasyUAClientServerApplicationExtension.GetApplicationElement(application)
print('Application URI string: ', applicationElement.ApplicationUriString, sep='')

# Obtain a new application certificate from the certificate manager (GDS), and store it for subsequent usage.
try:
    print('Obtaining new certificate...')
    certificate = IEasyUAClientServerApplicationExtension.ObtainNewCertificate(application, gdsEndpointDescriptor)
except UAException as uaException:
    print('*** Failure: ' + uaException.GetBaseException().Message)
    exit()

# Display results.
print('Certificate: ', certificate, sep='')

print()
print('Finished.')

' Shows how to obtain a new application certificate from the certificate manager (GDS), and store it for subsequent usage.
'
' Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .

Imports Microsoft.Extensions.DependencyInjection
Imports OpcLabs.BaseLib.Security.Cryptography.PkiCertificates
Imports OpcLabs.EasyOpc.UA
Imports OpcLabs.EasyOpc.UA.Application
Imports OpcLabs.EasyOpc.UA.Application.ComTypes
Imports OpcLabs.EasyOpc.UA.Application.Extensions
Imports OpcLabs.EasyOpc.UA.Extensions
Imports OpcLabs.EasyOpc.UA.OperationModel

Namespace Application._IEasyUAClientServerApplication
    Partial Friend Class ObtainNewCertificate
        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 application interface.
            Dim application As EasyUAApplication = EasyUAApplication.Instance

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

            ' Obtain a new application certificate from the certificate manager (GDS), and store it for subsequent usage.
            Dim certificate As IPkiCertificate
            Try
                certificate = application.ObtainNewCertificate(gdsEndpointDescriptor)
            Catch uaException As UAException
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException.Message)
                Exit Sub
            End Try

            ' Display results
            Console.WriteLine("Certificate: {0}", certificate)
        End Sub
    End Class
End Namespace

Object Pascal
PHP
Visual Basic (VB 6.0)
VBScript

// Shows how to obtain a new application certificate from the certificate manager (GDS),
// and store it for subsequent usage.
//
// Find all latest examples here : https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .

class procedure ObtainNewCertificate.Main;
var
  Application: TEasyUAApplication;
  ApplicationElement: _UAApplicationElement;
  Certificate: _PkiCertificate;
  GdsEndpointDescriptor: _UAEndpointDescriptor;
  Arguments: _UAObtainCertificateArguments;
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 application interface.
  Application := TEasyUAApplication.Create(nil);

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

  // Obtain a new application certificate from the certificate manager (GDS), and store it for subsequent usage.
  Arguments := CoUAObtainCertificateArguments.Create;
  Arguments.Parameters.GdsEndpointDescriptor := GdsEndpointDescriptor;

  try
    Certificate := Application.ObtainNewCertificate(Arguments);
  except
    on E: EOleException do
    begin
      WriteLn(Format('*** Failure: %s', [E.GetBaseException.Message]));
    end;
  end;

  // Display results
  WriteLn('Certificate: ', (Certificate as _PKICertificate).ToString);
end;

// Shows how to obtain a new application certificate from the certificate manager (GDS),
// and store it for subsequent usage.
//
// Find all latest examples here : https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .

// 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 application interface.
$Application = new COM("OpcLabs.EasyOpc.UA.Application.EasyUAApplication");

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

// Obtain a new application certificate from the certificate manager (GDS), and store it for subsequent usage.
$Arguments = new COM("OpcLabs.EasyOpc.UA.Application.UAObtainCertificateArguments");
$Arguments->Parameters->GdsEndpointDescriptor = $GdsEndpointDescriptor;

try
{
    $Certificate = $Application->ObtainNewCertificate($Arguments);
}
catch (com_exception $e)
{
    printf("*** Failure: %s\n", $e->getMessage());
    exit();
}

// Display results
printf("Certificate: %s\n", $Certificate);

REM Shows how to obtain a new application certificate from the certificate manager (GDS),
REM and store it for subsequent usage.
REM
REM Find all latest examples here : https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .

Private Sub IEasyUAClientServerApplication_ObtainNewCertificate_Main_Command_Click()
    OutputText = ""
    
    ' Define which GDS we will work with.
    Dim gdsEndpointDescriptor As New UAEndpointDescriptor
    gdsEndpointDescriptor.UrlString = "opc.tcp://opcua.demo-this.com:58810/GlobalDiscoveryServer"
    gdsEndpointDescriptor.UserIdentity.UserNameTokenInfo.UserName = "appadmin"
    gdsEndpointDescriptor.UserIdentity.UserNameTokenInfo.Password = "demo"
    
    ' Obtain the application interface
    Dim Application As New EasyUAApplication
    
    ' Display which application we are about to work with.
    OutputText = OutputText & "Application URI string: " & Application.GetApplicationElement.applicationUriString & vbCrLf

    ' Obtain a new application certificate from the certificate manager (GDS), and store it for subsequent usage.
    Dim arguments As New UAObtainCertificateArguments
    Set arguments.Parameters.gdsEndpointDescriptor = gdsEndpointDescriptor
    
    On Error Resume Next
    Dim certificate As PkiCertificate
    Set certificate = Application.ObtainNewCertificate(arguments)
    If Err.Number <> 0 Then
        OutputText = OutputText & "*** Failure: " & Err.Source & ": " & Err.Description & vbCrLf
        Exit Sub
    End If
    On Error GoTo 0

    ' Display results
    OutputText = OutputText & "Certificate: " & certificate & vbCrLf
End Sub

Rem Shows how to obtain a new application certificate from the certificate manager (GDS), and store it for subsequent usage.
Rem
Rem Find all latest examples here : https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .

Option Explicit

' Define which GDS we will work with.
Dim GdsEndpointDescriptor: Set GdsEndpointDescriptor = CreateObject("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 application interface.
Dim Application: Set Application = CreateObject("OpcLabs.EasyOpc.UA.Application.EasyUAApplication")

' Display which application we are about to work with.
Dim ApplicationElement: Set ApplicationElement = Application.GetApplicationElement
WScript.Echo "Application URI string: " & Application.GetApplicationElement.ApplicationUriString

Rem Obtain a new application certificate from the certificate manager (GDS), and store it for subsequent usage.
Dim Arguments: Set Arguments = CreateObject("OpcLabs.EasyOpc.UA.Application.UAObtainCertificateArguments")
Set Arguments.Parameters.GdsEndpointDescriptor = GdsEndpointDescriptor
On Error Resume Next
Dim Certificate: Set Certificate = Application.ObtainNewCertificate(Arguments)
If Err.Number <> 0 Then
    WScript.Echo "*** Failure: " & Err.Source & ": " & Err.Description
    WScript.Quit
End If
On Error Goto 0

' Display results
WScript.Echo "Certificate: " & Certificate

CSharp
Python
VB.NET

// Shows how to refresh own certificate stores using current trust lists for the application from the certificate manager.
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .

using System;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.Application;
using OpcLabs.EasyOpc.UA.Application.Extensions;
using OpcLabs.EasyOpc.UA.Extensions;
using OpcLabs.EasyOpc.UA.Gds;
using OpcLabs.EasyOpc.UA.OperationModel;

namespace UADocExamples.Application._IEasyUAClientServerApplication
{
    class RefreshTrustLists
    {
        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 application interface.
            EasyUAApplication application = EasyUAApplication.Instance;

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

            // Refresh own certificate stores using current trust lists for the application from the certificate manager.
            UATrustListMasks refreshedTrustLists;
            try
            {
                refreshedTrustLists = application.RefreshTrustLists(gdsEndpointDescriptor);
            }
            catch (UAException uaException)
            {
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException().Message);
                return;
            }

            // Display results
            Console.WriteLine("Refreshed trust lists: {0}", refreshedTrustLists);
        }
    }
}

# Shows how to refresh own certificate stores using current trust lists for the application from the certificate
# manager.
#
# Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
# OPC client and subscriber examples in Python on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-Python .
# The QuickOPC package is needed. Install it using "pip install opclabs_quickopc".
import opclabs_quickopc

# Import .NET namespaces.
from System import *
from OpcLabs.EasyOpc.UA import *
from OpcLabs.EasyOpc.UA.Application import *
from OpcLabs.EasyOpc.UA.Application.Extensions import *
from OpcLabs.EasyOpc.UA.Extensions import *
from OpcLabs.EasyOpc.UA.Gds import *
from OpcLabs.EasyOpc.UA.OperationModel import *


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

# Obtain the application interface.
application = EasyUAApplication.Instance

# Display which application we are about to work with.
applicationElement = IEasyUAClientServerApplicationExtension.GetApplicationElement(application)
print('Application URI string: ', applicationElement.ApplicationUriString, sep='')

# Refresh own certificate stores using current trust lists for the application from the certificate manager.
try:
    print('Refreshing trust lists...')
    refreshedTrustLists = IEasyUAClientServerApplicationExtension.RefreshTrustLists(application, gdsEndpointDescriptor)
except UAException as uaException:
    print('*** Failure: ' + uaException.GetBaseException().Message)
    exit()

# Display results.
print('Refreshed trust lists: ', Enum.Format(UATrustListMasks, refreshedTrustLists, 'G'), sep='')

print()
print('Finished.')

' Shows how to refresh own certificate stores using current trust lists for the application from the certificate manager.
'
' Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .

Imports Microsoft.Extensions.DependencyInjection
Imports OpcLabs.EasyOpc.UA
Imports OpcLabs.EasyOpc.UA.Application
Imports OpcLabs.EasyOpc.UA.Application.ComTypes
Imports OpcLabs.EasyOpc.UA.Application.Extensions
Imports OpcLabs.EasyOpc.UA.Extensions
Imports OpcLabs.EasyOpc.UA.Gds
Imports OpcLabs.EasyOpc.UA.OperationModel

Namespace Application._IEasyUAClientServerApplication
    Friend Class RefreshTrustLists
        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 application interface.
            Dim application As EasyUAApplication = EasyUAApplication.Instance

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

            ' Refresh own certificate stores using current trust lists for the application from the certificate manager.
            Dim refreshedTrustLists As UATrustListMasks
            Try
                refreshedTrustLists = application.RefreshTrustLists(gdsEndpointDescriptor)
            Catch uaException As UAException
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException.Message)
                Exit Sub
            End Try

            ' Display results
            Console.WriteLine("Refreshed trust lists: {0}", refreshedTrustLists)
        End Sub
    End Class
End Namespace

Object Pascal
PHP
Visual Basic (VB 6.0)

// Shows how to refresh own certificate stores using current trust lists
// for the application from the certificate manager.
//
// Find all latest examples here : https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .

class procedure RefreshTrustLists.Main;
var
  Application: TEasyUAApplication;
  GdsEndpointDescriptor: _UAEndpointDescriptor;
  RefreshedTrustLists: UATrustListMasks;
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 application interface.
  Application := TEasyUAApplication.Create(nil);

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

  // Refresh own certificate stores using current trust lists for the application from the certificate manager.
  try
    RefreshedTrustLists := Application.RefreshTrustLists(gdsEndpointDescriptor, True);
  except
    on E: EOleException do
    begin
      WriteLn(Format('*** Failure: %s', [E.GetBaseException.Message]));
      Exit;
    end;
  end;

  // Display results
  WriteLn('Refreshed trust lists: ', RefreshedTrustLists);
end;

// Shows how to refresh own certificate stores using current trust lists
// for the application from the certificate manager.
//
// Find all latest examples here : https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .

// 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 application interface.
$Application = new COM("OpcLabs.EasyOpc.UA.Application.EasyUAApplication");

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

// Refresh own certificate stores using current trust lists for the application from the certificate manager.
try
{
    $RefreshedTrustLists = $Application->RefreshTrustLists($GdsEndpointDescriptor, true);
}
catch (com_exception $e)
{
    printf("*** Failure: %s\n", $e->getMessage());
    exit();
}

// Display results
printf("Refreshed trust lists: %s\n", $RefreshedTrustLists);

REM Shows how to refresh own certificate stores using current trust lists
REM for the application from the certificate manager.
REM
REM Find all latest examples here : https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .

Private Sub IEasyUAClientServerApplication_RefreshTrustLists_Main_Command_Click()
    OutputText = ""
    
    ' Define which GDS we will work with.
    Dim gdsEndpointDescriptor As New UAEndpointDescriptor
    gdsEndpointDescriptor.UrlString = "opc.tcp://opcua.demo-this.com:58810/GlobalDiscoveryServer"
    gdsEndpointDescriptor.UserIdentity.UserNameTokenInfo.UserName = "appadmin"
    gdsEndpointDescriptor.UserIdentity.UserNameTokenInfo.Password = "demo"
    
    ' Obtain the application interface
    Dim Application As New EasyUAApplication
    
    ' Display which application we are about to work with.
    OutputText = OutputText & "Application URI string: " & Application.GetApplicationElement.applicationUriString & vbCrLf

    ' Refresh own certificate stores using current trust lists for the application from the certificate manager.
    On Error Resume Next
    Dim refreshedTrustLists As UATrustListMasks
    refreshedTrustLists = Application.RefreshTrustLists(gdsEndpointDescriptor, True)
    If Err.Number <> 0 Then
        OutputText = OutputText & "*** Failure: " & Err.Source & ": " & Err.Description & vbCrLf
        Exit Sub
    End If
    On Error GoTo 0

    ' Display results
    OutputText = OutputText & "Refreshed trust lists: " & refreshedTrustLists & vbCrLf
End Sub

Requirements

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

Reference

IEasyUAClientServerApplication Members
OpcLabs.EasyOpc.UA.Application Namespace

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