AutomationEventArgs.EventId 屬性

定義

取得事件識別項。Gets the event identifier.

public:
 property System::Windows::Automation::AutomationEvent ^ EventId { System::Windows::Automation::AutomationEvent ^ get(); };
public System.Windows.Automation.AutomationEvent EventId { get; }
member this.EventId : System.Windows.Automation.AutomationEvent
Public ReadOnly Property EventId As AutomationEvent

屬性值

AutomationEvent

事件識別項。The event identifier.

範例

在下列範例中,事件處理常式會檢查 EventId 事件的,並據以處理事件。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 void OnUIAutomationEvent(object src, AutomationEventArgs e)
{
    // Make sure the element still exists. Elements such as tooltips
    // can disappear before the event is processed.
    AutomationElement sourceElement;
    try
    {
        sourceElement = src as AutomationElement;
    }
    catch (ElementNotAvailableException)
    {
        return;
    }
    if (e.EventId == InvokePattern.InvokedEvent)
    {
        // TODO Add handling code.
    }
    else
    {
        // TODO Handle any other events that have been subscribed to.
    }
}
''' <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

備註

如果用戶端已使用相同的實例為多個事件新增事件處理常式 AutomationEventHandler ,則 EventId 可以使用來識別委派應處理的事件。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.

適用於