AutomationEventArgs.EventId Property

 

Gets the event identifier.

Namespace:   System.Windows.Automation
Assembly:  UIAutomationTypes (in UIAutomationTypes.dll)

Public ReadOnly Property EventId As AutomationEvent

Property Value

Type: System.Windows.Automation.AutomationEvent

The event identifier.

If a client has added event handlers for more than one event using the same AutomationEventHandler instance, EventId can be used to identify the event that the delegate should process.

In the following example, the event handler checks the EventId of the event and handles the event accordingly.

''' <summary>
''' AutomationEventHandler delegate.
''' </summary>
''' <param name="src">Object that raised the event.</param>
''' <param name="e">Event arguments.</param>
Private Sub OnUIAutomationEvent(ByVal src As Object, ByVal e As AutomationEventArgs)
    ' Make sure the element still exists. Elements such as tooltips can disappear
    ' before the event is processed.
    Dim sourceElement As AutomationElement
    Try
        sourceElement = DirectCast(src, AutomationElement)
    Catch ex As ElementNotAvailableException
        Exit Sub
    End Try
    If e.EventId Is InvokePattern.InvokedEvent Then
        ' TODO Add handling code.
    Else
    End If
    ' TODO Handle any other events that have been subscribed to.
    Console.WriteLine("Event: " & e.EventId.ProgrammaticName)
End Sub 'OnUIAutomationEvent

.NET Framework
Available since 3.0
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