SelectionPattern.InvalidatedEvent Bidang

Definisi

Ruang nama:

System.Windows.Automation

Rakitan:

UIAutomationClient.dll

Mengidentifikasi peristiwa yang dimunculkan ketika pilihan dalam kontainer telah berubah secara signifikan dan mengharuskan pengiriman lebih banyak peristiwa penambahan dan penghapusan daripada InvalidateLimit izin konstanta.

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

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

 staticval mutable InvalidatedEvent : System.Windows.Automation.AutomationEvent

Public Shared ReadOnly InvalidatedEvent As AutomationEvent 

Nilai Bidang

AutomationEvent

Contoh

Dalam contoh berikut, pendengar peristiwa dinyatakan untuk InvalidatedEvent.

///--------------------------------------------------------------------
/// <summary>
/// Subscribe to the selection events of interest.
/// </summary>
/// <param name="selectionContainer">
/// Automation element that supports SelectionPattern
/// </param>
///--------------------------------------------------------------------
private void SetSelectionEventHandlers
    (AutomationElement selectionContainer)
{            
    AutomationEventHandler selectionInvalidatedHandler =
        new AutomationEventHandler(SelectionInvalidatedHandler);

    Automation.AddAutomationEventHandler(
        SelectionPattern.InvalidatedEvent, 
        selectionContainer, 
        TreeScope.Element, 
        SelectionInvalidatedHandler);
}

///--------------------------------------------------------------------
/// <summary>
/// Selection invalidated event handler.
/// </summary>
/// <param name="src">Object that raised the event.</param>
/// <param name="e">Event arguments.</param>
///--------------------------------------------------------------------
private void SelectionInvalidatedHandler(object src, AutomationEventArgs e)
{
    // TODO: event handling
}

'''--------------------------------------------------------------------
''' <summary>
''' Subscribe to the selection events of interest.
''' </summary>
''' <param name="selectionContainer">
''' Automation element that supports SelectionPattern
''' </param>
'''--------------------------------------------------------------------
Private Sub SetSelectionEventHandlers( _
ByVal selectionContainer As AutomationElement)
    Dim selectionInvalidatedHandler As AutomationEventHandler = _
    New AutomationEventHandler(AddressOf OnSelectionInvalidatedHandler)

    Automation.AddAutomationEventHandler( _
    SelectionPattern.InvalidatedEvent, _
    selectionContainer, TreeScope.Element, selectionInvalidatedHandler)

End Sub

'''--------------------------------------------------------------------
''' <summary>
''' Selection invalidated event handler.
''' </summary>
''' <param name="src">Object that raised the event.</param>
''' <param name="e">Event arguments.</param>
'''--------------------------------------------------------------------
Private Sub OnSelectionInvalidatedHandler( _
ByVal src As Object, ByVal e As AutomationEventArgs)
    ' TODO: event handling
End Sub

Keterangan

Peristiwa yang tidak valid dinaikkan ketika pilihan dalam kontainer telah berubah secara signifikan dan mengharuskan pengiriman lebih banyak peristiwa penambahan dan penghapusan daripada InvalidateLimit yang diizinkan konstanta.

Pengidentifikasi ini digunakan oleh aplikasi klien Automation UI. Penyedia Automation UI harus menggunakan bidang yang setara di SelectionPatternIdentifiers.