WindowPattern.WindowClosedEvent Поле

Определение

Пространство имен:

System.Windows.Automation

Сборка:

UIAutomationClient.dll

Определяет событие, которое возникает при закрытии окна.

public: static initonly System::Windows::Automation::AutomationEvent ^ WindowClosedEvent;

public static readonly System.Windows.Automation.AutomationEvent WindowClosedEvent;

 staticval mutable WindowClosedEvent : System.Windows.Automation.AutomationEvent

Public Shared ReadOnly WindowClosedEvent As AutomationEvent 

Значение поля

AutomationEvent

Примеры

В следующем примере объявляются прослушиватели событий и AutomationEventHandler указывается делегат для WindowOpenedEvent событий и WindowClosedEvent .

///--------------------------------------------------------------------
/// <summary>
/// Register for events of interest.
/// </summary>
/// <param name="targetControl">
/// The automation element of interest.
/// </param>
///--------------------------------------------------------------------
private void RegisterForAutomationEvents(
    AutomationElement targetControl)
{
    AutomationEventHandler eventHandler = 
        new AutomationEventHandler(OnWindowOpenOrClose);
    Automation.AddAutomationEventHandler(
        WindowPattern.WindowClosedEvent, 
        targetControl, TreeScope.Element, eventHandler);
    Automation.AddAutomationEventHandler(
        WindowPattern.WindowOpenedEvent, 
        targetControl, TreeScope.Element, eventHandler);
}

///--------------------------------------------------------------------
/// <summary>
/// AutomationEventHandler delegate.
/// </summary>
/// <param name="src">Object that raised the event.</param>
/// <param name="e">Event arguments.</param>
///--------------------------------------------------------------------
private void OnWindowOpenOrClose(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 == WindowPattern.WindowOpenedEvent)
    {
        // TODO: event handling
        return;
    }
    if (e.EventId == WindowPattern.WindowClosedEvent)
    {
        // TODO: event handling
        return;
    }
}

'''------------------------------------------------------------------------
''' <summary>
''' Register for events of interest.
''' </summary>
''' <param name="targetControl">
''' The automation element of interest.
''' </param>
'''------------------------------------------------------------------------
Private Sub RegisterForEvents(ByVal targetControl As AutomationElement)
    Dim eventHandler As AutomationEventHandler = AddressOf OnWindowOpenOrClose
    Automation.AddAutomationEventHandler(WindowPattern.WindowClosedEvent, _
        targetControl, TreeScope.Element, eventHandler)
    Automation.AddAutomationEventHandler(WindowPattern.WindowOpenedEvent, _
        targetControl, TreeScope.Element, eventHandler)
End Sub

'''------------------------------------------------------------------------
''' <summary>
''' AutomationEventHandler delegate.
''' </summary>
''' <param name="src">Object that raised the event.</param>
''' <param name="e">Event arguments.</param>
'''------------------------------------------------------------------------
Private Sub OnWindowOpenOrClose(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
        Return
    End Try

    If e.EventId Is WindowPattern.WindowOpenedEvent Then
        ' TODO: event handling
        Return
    End If
    If e.EventId Is WindowPattern.WindowClosedEvent Then
        ' TODO: event handling
        Return
    End If
End Sub

Комментарии

Клиентскому приложению может потребоваться прослушивание WindowClosedEvent из кэшированного объекта, так как окно удаляется из структуры представления элемента управления автоматизации пользовательского интерфейса сразу после закрытия.

Этот идентификатор используется клиентскими приложениями автоматизации пользовательского интерфейса. Поставщики автоматизации пользовательского интерфейса должны использовать эквивалентное поле в WindowPatternIdentifiers.

См. также раздел

• WindowClosedEventArgs