QuickOPC User's Guide and Reference
PullMultipleItemChanges Method (IEasyDAClient)



OpcLabs.EasyOpcClassic Assembly > OpcLabs.EasyOpc.DataAccess Namespace > IEasyDAClient Interface : PullMultipleItemChanges Method
Maximum number of event notifications returned.
The number of milliseconds to wait, or System.Threading.Timeout.Infinite (-1) to wait indefinitely.
Attempts to pull multiple OPC item changes subscribed to by the SubscribeMultipleItems or SubscribeItem method.
Syntax
'Declaration
 
<CanBeNullAttribute()>
<EditorBrowsableAttribute(EditorBrowsableState.Advanced)>
<ElementsNotNullAttribute()>
Function PullMultipleItemChanges( _
   ByVal maximumCount As Integer, _
   ByVal millisecondsTimeout As Integer _
) As EasyDAItemChangedEventArgs()
'Usage
 
Dim instance As IEasyDAClient
Dim maximumCount As Integer
Dim millisecondsTimeout As Integer
Dim value() As EasyDAItemChangedEventArgs
 
value = instance.PullMultipleItemChanges(maximumCount, millisecondsTimeout)
[CanBeNull()]
[EditorBrowsable(EditorBrowsableState.Advanced)]
[ElementsNotNull()]
EasyDAItemChangedEventArgs[] PullMultipleItemChanges( 
   int maximumCount,
   int millisecondsTimeout
)
[CanBeNull()]
[EditorBrowsable(EditorBrowsableState.Advanced)]
[ElementsNotNull()]
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.
Exceptions
ExceptionDescription
One of the arguments provided to a method is not valid.
The value of an argument is outside the allowable range of values as defined by the invoked method.
Requirements

Target Platforms: .NET Framework: Windows 10, Windows Server 2012, Windows Server 2016; .NET Core, .NET 5: Linux, macOS, Microsoft Windows

See Also

Reference

IEasyDAClient Interface
IEasyDAClient Members