'Declaration
 
<ExtensionAttribute()>
<NotNullAttribute()>
Public Overloads Shared Function SubscribeMultipleItems( _
   ByVal client As IEasyDAClient, _
   ByVal itemGroupArgumentsArray() As DAItemGroupArguments, _
   ByVal callback As EasyDAItemChangedEventHandler _
) As Integer()

'Usage
 
Dim client As IEasyDAClient
Dim itemGroupArgumentsArray() As DAItemGroupArguments
Dim callback As EasyDAItemChangedEventHandler
Dim value() As Integer
 
value = IEasyDAClientExtension.SubscribeMultipleItems(client, itemGroupArgumentsArray, callback)

[Extension()]
[NotNull()]
public static int[] SubscribeMultipleItems( 
   IEasyDAClient client,
   DAItemGroupArguments[] itemGroupArgumentsArray,
   EasyDAItemChangedEventHandler callback
)

[Extension()]
[NotNull()]
public:
static array<int>^ SubscribeMultipleItems( 
   IEasyDAClient^ client,
   array<DAItemGroupArguments^>^ itemGroupArgumentsArray,
   EasyDAItemChangedEventHandler^ callback
) 

Parameters

client

The client object that will perform the operation.

This is typically the EasyDAClient object.

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

itemGroupArgumentsArray

Array of arguments, one element per each OPC item involved in the operation.

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

The individual elements of the parameter value cannot be null (Nothing in Visual Basic).

callback

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

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

Return Value

The size of the input array will become the size of the output array. The element positions (indices) in the output array are the same as in the input array.

If callback is a null reference, only the ItemChanged events are generated, but no callback method is invoked.

This is an extension method (info: C#, VB.NET). In languages that have support for extensions methods (such as C# and VB.NET), you can use the extension method as if it were a regular method on the object that is its first parameter. In other languages (such as with Python.NET), you will call the extension as a static method, and pass it the object on which it acts as its first parameter.

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