UpdateWriteAttributeData Method (UADataVariable)

Updates the write attribute data.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
Public Sub UpdateWriteAttributeData( _
   ByVal writeAttributeData As UAAttributeData _
)

'Usage
 
Dim instance As UADataVariable
Dim writeAttributeData As UAAttributeData
 
instance.UpdateWriteAttributeData(writeAttributeData)

public void UpdateWriteAttributeData( 
   UAAttributeData writeAttributeData
)

public:
void UpdateWriteAttributeData( 
   UAAttributeData^ writeAttributeData
)

Parameters

writeAttributeData: The variable data (value, timestamp, status code) modified by OPC writes.
The value of this parameter cannot be null (Nothing in Visual Basic).

Exceptions

Exception Description

Exception	Description
System.ArgumentNullException	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.

System.ArgumentNullException

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

You can use this method to set the initial data of a writable data variable.

This method sets the WriteAttributeData property to the specified writeAttributeData. If WriteLoopback is true (the default), a clone of writeAttributeData is also set to the ReadAttributeData property.

Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2016, Windows Server 2022; .NET: Linux, macOS, Microsoft Windows

Reference

UADataVariable Class
UADataVariable Members
OpcLabs.EasyOpc.UA.NodeSpace.UADataVariableExtension.UpdateWriteAttributeData(OpcLabs.EasyOpc.UA.NodeSpace.UADataVariable,System.Object)
WriteLoopback Property

Documentation Home, Send Feedback. Resources: Knowledge Base, Product Downloads. Technical support: Online Forums, FAQ.

Missing some example? Ask us for it on our Online Forums! You do not have to own a commercial license in order to use Online Forums, and we reply to every post.