QuickOPC User's Guide and Reference
PullMultipleNotifications Method (EasyAEClientCore)



OpcLabs.EasyOpcClassic Assembly > OpcLabs.EasyOpc.AlarmsAndEvents Namespace > EasyAEClientCore Class : PullMultipleNotifications 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 events subscribed to by the IEasyAEClient.SubscribeEvents method. Returns refresh or standard event notifications.
Syntax
'Declaration
 
Public Function PullMultipleNotifications( _
   ByVal maximumCount As Integer, _
   ByVal millisecondsTimeout As Integer _
) As EasyAENotificationEventArgs()
'Usage
 
Dim instance As EasyAEClientCore
Dim maximumCount As Integer
Dim millisecondsTimeout As Integer
Dim value() As EasyAENotificationEventArgs
 
value = instance.PullMultipleNotifications(maximumCount, 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

A null reference (Nothing in Visual Basic) is passed to a method that does not accept it as a valid argument.

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.

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