SelectionPattern.InvalidatedEvent Campo

Definición

Espacio de nombres:
System.Windows.Automation
Ensamblado:
UIAutomationClient.dll

Identifica el evento que se genera cuando una selección de un contenedor ha cambiado significativamente y requiere enviar más eventos de suma y eliminación de los que permite la InvalidateLimit constante.

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

Valor de campo

AutomationEvent

Ejemplos

En el ejemplo siguiente, se declara un agente de escucha de eventos para .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

Comentarios

Se genera un evento invalidado cuando una selección de un contenedor ha cambiado significativamente y requiere enviar más eventos de suma y eliminación que los InvalidateLimit permisos constantes.

Las aplicaciones cliente usan este identificador Automatización de la interfaz de usuario. Automatización de la interfaz de usuario proveedores deben usar el campo equivalente en SelectionPatternIdentifiers.

Se aplica a