PullMultipleItemChanges Method (EasyDAClientCore)

Attempts to pull multiple OPC item changes subscribed to by the IEasyDAClient.SubscribeMultipleItems or SubscribeItem method.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
Public Function PullMultipleItemChanges( _
   ByVal maximumCount As Integer, _
   ByVal millisecondsTimeout As Integer _
) As EasyDAItemChangedEventArgs()

'Usage
 
Dim instance As EasyDAClientCore
Dim maximumCount As Integer
Dim millisecondsTimeout As Integer
Dim value() As EasyDAItemChangedEventArgs
 
value = instance.PullMultipleItemChanges(maximumCount, millisecondsTimeout)

public EasyDAItemChangedEventArgs[] PullMultipleItemChanges( 
   int maximumCount,
   int millisecondsTimeout
)

public:
array<EasyDAItemChangedEventArgs^>^ PullMultipleItemChanges( 
   int maximumCount,
   int millisecondsTimeout
)

Parameters

maximumCount: Maximum number of event notifications returned.
millisecondsTimeout: The number of milliseconds to wait, or System.Threading.Timeout.Infinite (-1) to wait indefinitely.

Return Value

An array of event arguments, or null if no event is available within the specified time.

This method can return null (Nothing in Visual Basic).

The individual elements of the returned value are never null (Nothing in Visual Basic).

This return value of this method should not be ignored.

Exceptions

Exception	Description
System.ArgumentOutOfRangeException	The value of an argument is outside the allowable range of values as defined by the invoked method. 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.ObjectDisposedException	An operation was performed on a disposed object.

Exception

Description

System.ArgumentOutOfRangeException

The value of an argument is outside the allowable range of values as defined by the invoked method.

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.ObjectDisposedException

An operation was performed on a disposed object.

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

EasyDAClientCore Class
EasyDAClientCore Members

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