OPC Studio User's Guide and Reference
PullMultipleDataChangeNotifications Method (EasyUAClientCore)



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA Namespace > EasyUAClientCore Class : PullMultipleDataChangeNotifications 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 data change notifications subscribed to by the SubscribeMultipleMonitoredItems or SubscribeDataChange method.
Syntax
'Declaration
 
Public Function PullMultipleDataChangeNotifications( _
   ByVal maximumCount As Integer, _
   ByVal millisecondsTimeout As Integer _
) As EasyUADataChangeNotificationEventArgs()
'Usage
 
Dim instance As EasyUAClientCore
Dim maximumCount As Integer
Dim millisecondsTimeout As Integer
Dim value() As EasyUADataChangeNotificationEventArgs
 
value = instance.PullMultipleDataChangeNotifications(maximumCount, millisecondsTimeout)
public EasyUADataChangeNotificationEventArgs[] PullMultipleDataChangeNotifications( 
   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

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.

Requirements

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

See Also