OPC Studio User's Guide and Reference
BeginObtainNewCertificate Method (AbstractEasyUAClientServerApplication)



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA.Application Namespace > AbstractEasyUAClientServerApplication Class : BeginObtainNewCertificate Method
Contains arguments for obtaining a new application certificate from the OPC UA Global Discovery Server (GDS).
The delegate that is executed when the operation completes.
An object that contains any additional user-defined data.
A provider for progress updates.
Begins an asynchronous operation that obtains a new application own certificate from the certificate manager, and stores it for subsequent usage.
Syntax
'Declaration
 
Public Function BeginObtainNewCertificate( _
   ByVal arguments As UAObtainCertificateArguments, _
   ByVal asyncCallback As AsyncCallback, _
   ByVal state As Object, _
   ByVal progress As IProgress(Of String()) _
) As IAsyncResult
'Usage
 
Dim instance As AbstractEasyUAClientServerApplication
Dim arguments As UAObtainCertificateArguments
Dim asyncCallback As AsyncCallback
Dim state As Object
Dim progress As IProgress(Of String())
Dim value As IAsyncResult
 
value = instance.BeginObtainNewCertificate(arguments, asyncCallback, state, progress)

Parameters

arguments
Contains arguments for obtaining a new application certificate from the OPC UA Global Discovery Server (GDS).
asyncCallback
The delegate that is executed when the operation completes.
state
An object that contains any additional user-defined data.
progress
A provider for progress updates.

Return Value

Returns a status object that represents the asynchronous call.
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.

The operation first updates the application's registration in the GDS, before making a request to the certificate manager.

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