OPC Studio User's Guide and Reference
BeginObtainNewCertificate(IEasyUAClientServerApplication,UACertificateRequestParameters,IProgress<String[]>) Method



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA.Application.Extensions Namespace > IEasyUAClientServerApplicationExtension Class > BeginObtainNewCertificate Method : BeginObtainNewCertificate(IEasyUAClientServerApplication,UACertificateRequestParameters,IProgress<String[]>) Method
The OPC UA client/server application object that will perform the operation.

In client applications, this is typically obtained by calling System.IServiceProvider.GetService(System.Type) on the OpcLabs.EasyOpc.UA.IEasyUAClient (EasyUAClient object) with the type of OpcLabs.EasyOpc.UA.Application.IEasyUAClientServerApplication as an argument.

The value of this parameter cannot be null (Nothing in Visual Basic).

The parameters describing how the certificate should be obtained.

The value of this parameter cannot be null (Nothing in Visual Basic).

A provider for progress updates.

The value of this parameter can be null (Nothing in Visual Basic).

Begins obtaining a new application certificate from the certificate manager, specifying the certificate request parameters, and a progress update provider.
Syntax
'Declaration
 
<ExtensionAttribute()>
<NotNullAttribute()>
Public Overloads Shared Function BeginObtainNewCertificate( _
   ByVal application As IEasyUAClientServerApplication, _
   ByVal parameters As UACertificateRequestParameters, _
   ByVal progress As IProgress(Of String()) _
) As IAsyncResult
'Usage
 
Dim application As IEasyUAClientServerApplication
Dim parameters As UACertificateRequestParameters
Dim progress As IProgress(Of String())
Dim value As IAsyncResult
 
value = IEasyUAClientServerApplicationExtension.BeginObtainNewCertificate(application, parameters, progress)

Parameters

application
The OPC UA client/server application object that will perform the operation.

In client applications, this is typically obtained by calling System.IServiceProvider.GetService(System.Type) on the OpcLabs.EasyOpc.UA.IEasyUAClient (EasyUAClient object) with the type of OpcLabs.EasyOpc.UA.Application.IEasyUAClientServerApplication as an argument.

The value of this parameter cannot be null (Nothing in Visual Basic).

parameters
The parameters describing how the certificate should be obtained.

The value of this parameter cannot be null (Nothing in Visual Basic).

progress
A provider for progress updates.

The value of this parameter can be null (Nothing in Visual Basic).

Return Value

This method never returns null (Nothing in Visual Basic).

Exceptions
ExceptionDescription

A null reference (Nothing in Visual Basic) is passed to a method that does not accept it as a valid argument.

This is a usage error, i.e. it will never occur (the exception will not be thrown) in a correctly written program. Your code should not catch this exception.

Remarks

The operation is asynchronous, because it involves multiple steps, and waiting for a finalization of the request by the GDS (see the OpcLabs.EasyOpc.UA.Gds.IEasyUACertificateManagement.FinishRequest method). End of the operation is handled by the EndObtainNewCertificate method. The operation can be cancelled using the CancelObtainNewCertificate method.

For a synchronous alternative, see the ObtainNewCertificate(IEasyUAClientServerApplication,UAEndpointDescriptor) extension method and its overloads.

For a task-based asynchronous programming pattern alternative, see the ObtainNewCertificateAsync(IEasyUAClientServerApplication,UAEndpointDescriptor) extension method and its overloads.

This is an extension method (info: C#, VB.NET). In languages that have support for extensions methods (such as C# and VB.NET), you can use the extension method as if it were a regular method on the object that is its first parameter. In other languages (such as with Python.NET), you will call the extension as a static method, and pass it the object on which it acts as its first parameter.

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