OPC Studio User's Guide and Reference
HasOwnCertificate(IEasyUAClientServerApplication,String) Method



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA.Application.Extensions Namespace > IEasyUAClientServerApplicationExtension Class > HasOwnCertificate Method : HasOwnCertificate(IEasyUAClientServerApplication,String) Method
The OPC UA client/server application object that will perform the operation.
Id of the certificate. Normally an empty string.
Determines whether the application's own certificate is present.
Syntax
'Declaration
 
<ExtensionAttribute()>
Public Overloads Shared Function HasOwnCertificate( _
   ByVal application As IEasyUAClientServerApplication, _
   ByVal certificateSubId As String _
) As Boolean
'Usage
 
Dim application As IEasyUAClientServerApplication
Dim certificateSubId As String
Dim value As Boolean
 
value = IEasyUAClientServerApplicationExtension.HasOwnCertificate(application, certificateSubId)

Parameters

application
The OPC UA client/server application object that will perform the operation.
certificateSubId
Id of the certificate. Normally an empty string.

Return Value

Returns true if the application's own certificate is present in the certificate store. Returns false otherwise.
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.

The OPC UA operation has failed. This operation exception in uniformly used to allow common handling of various kinds of errors. The System.Exception.InnerException always contains information about the actual error cause.

This is an operation error that depends on factors external to your program, and thus cannot be always avoided. Your code must handle it appropriately.

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