StructureChangedEventArgs(StructureChangeType, Int32[]) Constructeur

public:
 StructureChangedEventArgs(System::Windows::Automation::StructureChangeType structureChangeType, cli::array <int> ^ runtimeId);

public StructureChangedEventArgs (System.Windows.Automation.StructureChangeType structureChangeType, int[] runtimeId);

new System.Windows.Automation.StructureChangedEventArgs : System.Windows.Automation.StructureChangeType * int[] -> System.Windows.Automation.StructureChangedEventArgs

Public Sub New (structureChangeType As StructureChangeType, runtimeId As Integer())

Paramètres

Exemples

L’exemple suivant montre comment construire et déclencher un événement lorsque les enfants sont ajoutés ou supprimés d’une zone de liste personnalisée.

/// <summary>
/// Responds to an addition to the UI Automation tree structure by raising an event.
/// </summary>
/// <param name="list">
/// The list to which the item was added.
/// </param>
/// <remarks>
/// For the runtime Id of the item, pass 0 because the provider cannot know
/// what its actual runtime Id is.
/// </remarks>
public static void OnStructureChangeAdd(CustomListControl list)
{
    if (AutomationInteropProvider.ClientsAreListening)
    {
        int[] fakeRuntimeId = { 0 };
        StructureChangedEventArgs args =
            new StructureChangedEventArgs(StructureChangeType.ChildrenBulkAdded, 
            fakeRuntimeId);
        AutomationInteropProvider.RaiseStructureChangedEvent(
            (IRawElementProviderSimple)list.Provider, args);
    }
}

/// <summary>
/// Responds to a removal from the UI Automation tree structure 
/// by raising an event.
/// </summary>
/// <param name="list">
/// The list from which the item was removed.
/// </param>
/// <remarks>
/// For the runtime Id of the list, pass 0 because the provider cannot know
/// what its actual runtime ID is.
/// </remarks>
public static void OnStructureChangeRemove(CustomListControl list)
{
    if (AutomationInteropProvider.ClientsAreListening)
    {
        int[] fakeRuntimeId = { 0 };
        StructureChangedEventArgs args =
            new StructureChangedEventArgs(StructureChangeType.ChildrenBulkRemoved, 
            fakeRuntimeId);
        AutomationInteropProvider.RaiseStructureChangedEvent(
            (IRawElementProviderSimple)list.Provider, args);
    }
}

''' <summary>
''' Responds to an addition to the UI Automation tree structure by raising an event.
''' </summary>
''' <param name="list">
''' The list to which the item was added.
''' </param>
''' <remarks>
''' For the runtime Id of the item, pass 0 because the provider cannot know
''' what its actual runtime Id is.
''' </remarks>
Public Shared Sub OnStructureChangeAdd(ByVal list As CustomListControl)
    If AutomationInteropProvider.ClientsAreListening Then
        Dim fakeRuntimeId(1) As Integer
        fakeRuntimeId(0) = 0
        Dim args As New StructureChangedEventArgs( _
            StructureChangeType.ChildrenBulkAdded, fakeRuntimeId)
        AutomationInteropProvider.RaiseStructureChangedEvent( _
            CType(list.Provider, IRawElementProviderSimple), args)
    End If

End Sub


''' <summary>
''' Responds to a removal from the UI Automation tree structure by raising an event.
''' </summary>
''' <param name="list">
''' The list from which the item was removed.
''' </param>
''' <remarks>
''' For the runtime Id of the list, pass 0 because the provider cannot know
''' what its actual runtime ID is.
''' </remarks>
Public Shared Sub OnStructureChangeRemove(ByVal list As CustomListControl)
    If AutomationInteropProvider.ClientsAreListening Then
        Dim fakeRuntimeId(1) As Integer
        fakeRuntimeId(0) = 0
        Dim args As New StructureChangedEventArgs( _
            StructureChangeType.ChildrenBulkRemoved, fakeRuntimeId)
        AutomationInteropProvider.RaiseStructureChangedEvent( _
            CType(list.Provider, IRawElementProviderSimple), args)
    End If

End Sub

Remarques

Les valeurs qui peuvent être retournées structureChangeType dépendent de l’implémentation du fournisseur UI Automation. Par exemple, lorsque des éléments sont ajoutés ou supprimés d’une zone de liste Win32, si le fournisseur n’est pas en mesure de déterminer le nombre d’éléments ajoutés ou supprimés, il peut spécifier ChildrenInvalidated et non ChildAdded ou non.ChildRemoved

Le tableau suivant décrit les informations contenues dans l’événement reçu par les StructureChangedEventHandler différentes modifications de structure.

Les contrôles personnalisés peuvent ne pas être en mesure de fournir une valeur significative dans runtimeId. Pour plus d'informations, consultez RaiseStructureChangedEvent.

S’applique à

Voir aussi

• RuntimeIdProperty