SelectionItemPattern.ElementRemovedFromSelectionEvent Pole

Definice

Obor názvů:

System.Windows.Automation

Sestavení:

UIAutomationClient.dll

Identifikuje událost vyvolanou při odebrání položky z kolekce vybraných položek.

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 

Hodnota pole

AutomationEvent

Příklady

V následujícím příkladu jsou pro SelectionItemPattern události deklarovány naslouchací procesy událostí.

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

Poznámky

Pokud je výsledkem RemoveFromSelection volání jedna vybraná položka, ElementSelectedEvent bude místo toho vyvolána položka.

Tento identifikátor používají klientské aplikace automatizace uživatelského rozhraní. Zprostředkovatelé automatizace uživatelského rozhraní by měli používat ekvivalentní pole v SelectionItemPatternIdentifiersnástroji .