SelectionItemPattern.ElementRemovedFromSelectionEvent Alan

Tanım

Ad Alanı:

System.Windows.Automation

Bütünleştirilmiş Kod:

UIAutomationClient.dll

Bir öğe seçili öğeler koleksiyonundan kaldırıldığında tetiklenen olayı tanımlar.

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

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

 staticval mutable ElementRemovedFromSelectionEvent : System.Windows.Automation.AutomationEvent

Public Shared ReadOnly ElementRemovedFromSelectionEvent As AutomationEvent 

Alan Değeri

AutomationEvent

Örnekler

Aşağıdaki örnekte, olaylar için SelectionItemPattern olay dinleyicileri bildirilir.

///--------------------------------------------------------------------
/// <summary>
/// Subscribe to the selection item events of interest.
/// </summary>
/// <param name="selectionItem">
/// Automation element that supports SelectionItemPattern and is 
/// a child of a selection container that supports SelectionPattern
/// </param>
/// <remarks>
/// The events are raised by the SelectionItem elements, 
/// not the Selection container.
/// </remarks>
///--------------------------------------------------------------------
private void SetSelectionEventHandlers
    (AutomationElement selectionItem)
{
    AutomationEventHandler selectionHandler =
        new AutomationEventHandler(SelectionHandler);

    Automation.AddAutomationEventHandler(
        SelectionItemPattern.ElementSelectedEvent,
        selectionItem,
        TreeScope.Element,
        SelectionHandler);
    Automation.AddAutomationEventHandler(
        SelectionItemPattern.ElementAddedToSelectionEvent,
        selectionItem,
        TreeScope.Element,
        SelectionHandler);
    Automation.AddAutomationEventHandler(
        SelectionItemPattern.ElementRemovedFromSelectionEvent,
        selectionItem,
        TreeScope.Element,
        SelectionHandler);
}

private void SelectionHandler(object src, AutomationEventArgs e)
{
    // TODO: event handling
}

'''--------------------------------------------------------------------
''' <summary>
''' Subscribe to the selection item events of interest.
''' </summary>
''' <param name="selectionItem">
''' Automation element that supports SelectionItemPattern and is 
''' a child of a selection container that supports SelectionPattern
''' </param>
''' <remarks>
''' The events are raised by the SelectionItem elements, 
''' not the Selection container.
''' </remarks>
'''--------------------------------------------------------------------
Private Sub SetSelectionEventHandlers( _
ByVal selectionItem As AutomationElement)
    Dim selectionHandler As AutomationEventHandler = _
    New AutomationEventHandler(AddressOf OnSelectionHandler)

    Automation.AddAutomationEventHandler( _
    SelectionItemPattern.ElementSelectedEvent, _
    selectionItem, TreeScope.Element, selectionHandler)
    Automation.AddAutomationEventHandler( _
    SelectionItemPattern.ElementAddedToSelectionEvent, _
    selectionItem, TreeScope.Element, selectionHandler)
    Automation.AddAutomationEventHandler( _
    SelectionItemPattern.ElementRemovedFromSelectionEvent, _
    selectionItem, TreeScope.Element, selectionHandler)
End Sub


Private Sub OnSelectionHandler(ByVal src As Object, ByVal e As AutomationEventArgs)
    ' TODO: event handling
End Sub

Açıklamalar

Bir çağrının RemoveFromSelection sonucu tek bir seçili öğeyse, bunun yerine bir ElementSelectedEvent oluşturulur.

Bu tanımlayıcı UI Otomasyonu istemci uygulamaları tarafından kullanılır. UI Otomasyonu sağlayıcıları içindeki eşdeğer alanı SelectionItemPatternIdentifierskullanmalıdır.