UnsubscribeMultipleEvents Method

Unsubscribe from changes of multiple OPC events.

Unsubscribe from changes of multiple OPC events, specifying array of integer handles.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
<ExtensionAttribute()>
Public Shared Sub UnsubscribeMultipleEvents( _
   ByVal client As IEasyAEClient, _
   ByVal handles As IEnumerable(Of Integer) _
)

'Usage
 
Dim client As IEasyAEClient
Dim handles As IEnumerable(Of Integer)
 
IEasyAEClientExtension2.UnsubscribeMultipleEvents(client, handles)

[Extension()]
public static void UnsubscribeMultipleEvents( 
   IEasyAEClient client,
   IEnumerable<int> handles
)

[Extension()]
public:
static void UnsubscribeMultipleEvents( 
   IEasyAEClient^ client,
   IEnumerable<int>^ handles
)

Parameters

client: The client object that will perform the operation.
handles: Subscription handles. Can be an array.

Exceptions

Exception Description

Exception	Description
System.ArgumentException	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.
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.ArgumentException

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.

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

The event subscription handles become invalid after this method is called.

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

IEasyAEClientExtension2 Class
IEasyAEClientExtension2 Members

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