PullItemChangeList Method (

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

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
<CanBeNullAttribute()>
<EditorBrowsableAttribute(EditorBrowsableState.Advanced)>
<ElementsNotNullAttribute()>
Function PullItemChangeList( _
   ByVal maximumCount As Integer, _
   ByVal millisecondsTimeout As Integer _
) As _ElasticVector

'Usage
 
Dim instance As _EasyDAClient
Dim maximumCount As Integer
Dim millisecondsTimeout As Integer
Dim value As _ElasticVector
 
value = instance.PullItemChangeList(maximumCount, millisecondsTimeout)

[CanBeNull()]
[EditorBrowsable(EditorBrowsableState.Advanced)]
[ElementsNotNull()]
_ElasticVector PullItemChangeList( 
   int maximumCount,
   int millisecondsTimeout
)

[CanBeNull()]
[EditorBrowsable(EditorBrowsableState.Advanced)]
[ElementsNotNull()]
_ElasticVector^ PullItemChangeList( 
   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.

Exceptions

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.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.

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.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.

Remarks

This method uses lists instead of arrays.

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

_EasyDAClient Interface
_EasyDAClient Members

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