SelectionItemPattern.ElementRemovedFromSelectionEvent Veld

Definitie

Naamruimte:
System.Windows.Automation
Assembly:
UIAutomationClient.dll

Identificeert de gebeurtenis die wordt gegenereerd wanneer een item wordt verwijderd uit een verzameling geselecteerde items.

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

Waarde van veld

AutomationEvent

Voorbeelden

In het volgende voorbeeld worden gebeurtenislisteners gedeclareerd voor de SelectionItemPattern gebeurtenissen.

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

Opmerkingen

Als het resultaat van een RemoveFromSelection aanroep één geselecteerd item is, wordt in plaats daarvan een ElementSelectedEvent item gegenereerd.

Deze id wordt gebruikt door UI Automation clienttoepassingen. UI Automation providers moeten het equivalente veld in SelectionItemPatternIdentifiers gebruiken.

Van toepassing op