OPC Studio User's Guide and Reference
EasyUAMonitoredItemArguments Constructor(EasyUADataChangeNotificationEventHandler,UAMonitoredItemArguments)



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA.OperationModel Namespace > EasyUAMonitoredItemArguments Class > EasyUAMonitoredItemArguments Constructor : EasyUAMonitoredItemArguments Constructor(EasyUADataChangeNotificationEventHandler,UAMonitoredItemArguments)
A callback method to be invoked for each significant monitored item change.

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

Monitored item arguments object to be copied from.

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

Initializes a new instance of the class, specifying the data change callback, and monitored item arguments.
Syntax
'Usage
 
Dim dataChangeCallback As EasyUADataChangeNotificationEventHandler
Dim monitoredItemArguments As UAMonitoredItemArguments
 
Dim instance As New EasyUAMonitoredItemArguments(dataChangeCallback, monitoredItemArguments)

Parameters

dataChangeCallback
A callback method to be invoked for each significant monitored item change.

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

monitoredItemArguments
Monitored item arguments object to be copied from.

The value of this parameter cannot be 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.

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