SelectionItemPattern.ElementRemovedFromSelectionEvent Bidang
Definisi
Penting
Beberapa informasi terkait produk prarilis yang dapat diubah secara signifikan sebelum dirilis. Microsoft tidak memberikan jaminan, tersirat maupun tersurat, sehubungan dengan informasi yang diberikan di sini.
Mengidentifikasi peristiwa yang dimunculkan saat item dihapus dari kumpulan item yang dipilih.
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
Nilai Bidang
Contoh
Dalam contoh berikut, pendengar peristiwa dinyatakan untuk peristiwa tersebut SelectionItemPattern .
///--------------------------------------------------------------------
/// <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
Keterangan
Jika hasil RemoveFromSelection panggilan adalah satu item yang dipilih, maka ElementSelectedEvent akan dinaikkan sebagai gantinya.
Pengidentifikasi ini digunakan oleh aplikasi klien Automation UI. Penyedia Automation UI harus menggunakan bidang yang setara di SelectionItemPatternIdentifiers.