SelectionItemPattern.ElementRemovedFromSelectionEvent フィールド

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定義

名前空間:
System.Windows.Automation
アセンブリ:
UIAutomationClient.dll

選択した項目のコレクションから項目が削除されたときに発生するイベントを識別します。

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

フィールド値

AutomationEvent

例

次の例では、イベントリスナーがイベントに対して SelectionItemPattern 宣言されています。

///--------------------------------------------------------------------
/// <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

注釈

呼び出しの RemoveFromSelection 結果が 1 つの選択された項目である場合は、代わりに が ElementSelectedEvent 発生します。

この識別子は、UI オートメーション クライアント アプリケーションで使用されます。 UI オートメーション プロバイダーでは、 で SelectionItemPatternIdentifiers同等のフィールドを使用する必要があります。

適用対象