OPC Studio User's Guide and Reference
OnAreDataSubscribedChanged Method



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OpcLabs.ServerOpcUA Assembly > OpcLabs.EasyOpc.UA.NodeSpace Namespace > UADataVariable Class : OnAreDataSubscribedChanged Method
The old value of the property.
Called when the value of the AreDataSubscribed property has changed.
Syntax
'Declaration
 
Protected Overridable Sub OnAreDataSubscribedChanged( _
   ByVal oldValue As Boolean _
) 
 
'Usage
 
Dim instance As UADataVariable
Dim oldValue As Boolean
 
instance.OnAreDataSubscribedChanged(oldValue)

Parameters

oldValue
The old value of the property.
Remarks

This method or property does not throw any exceptions, aside from execution exceptions such as System.Threading.ThreadAbortException or System.OutOfMemoryException.

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