OPC Studio User's Guide and Reference
SubscribeNode(Boolean,Object,String) Method



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA.InformationModel Namespace > UAModelClient Class > SubscribeNode Method : SubscribeNode(Boolean,Object,String) Method
true to subscribe; false to unsubscribe.
The node on which the operation will be performed.
The operation will be performed only on members tagged with this tag.
Subscribes or unsubscribes model members of the given node that are tagged with the specified tag.
Syntax
'Declaration
 
Public Overloads Sub SubscribeNode( _
   ByVal active As Boolean, _
   ByVal node As Object, _
   ByVal modellingTag As String _
) 
'Usage
 
Dim instance As UAModelClient
Dim active As Boolean
Dim node As Object
Dim modellingTag As String
 
instance.SubscribeNode(active, node, modellingTag)
public void SubscribeNode( 
   bool active,
   object node,
   string modellingTag
)
public:
void SubscribeNode( 
   bool active,
   Object^ node,
   String^ modellingTag
) 

Parameters

active
true to subscribe; false to unsubscribe.
node
The node on which the operation will be performed.
modellingTag
The operation will be performed only on members tagged with this tag.
Exceptions
ExceptionDescription

One of the arguments provided to a method is not valid.

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.

The component is not licensed for the operation requested.
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