OPC Studio User's Guide and Reference
CallbackError Method (EasyUAClientCore)



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA Namespace > EasyUAClientCore Class : CallbackError Method
Name of the callback or event handler.Name of the callback or event handler.
The exception thrown by the handler.The exception thrown by the handler.
Processes an error that has occurred during a callback. Processes an error that has occurred during a callback.
Syntax
'Declaration
 
Protected Overrides Sub CallbackError( _
   ByVal name As String, _
   ByVal exception As Exception _
) 
'Usage
 
Dim instance As EasyUAClientCore
Dim name As String
Dim exception As Exception
 
instance.CallbackError(name, exception)
protected override void CallbackError( 
   string name,
   Exception exception
)
protected:
void CallbackError( 
   String^ name,
   Exception^ exception
) override 

Parameters

name
Name of the callback or event handler.Name of the callback or event handler.
exception
The exception thrown by the handler.The exception thrown by the handler.
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.

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.

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