ISelectionItemProvider.RemoveFromSelection Método

Definición

Espacio de nombres:

System.Windows.Automation.Provider

Ensamblado:

UIAutomationProvider.dll

Quita el elemento actual de la colección de elementos seleccionados.

public:
 void RemoveFromSelection();

public void RemoveFromSelection ();

abstract member RemoveFromSelection : unit -> unit

Public Sub RemoveFromSelection ()

Ejemplos

El código de ejemplo siguiente quita el elemento de una colección de elementos seleccionados.

/// <summary>
/// Removes the item from the selection in list boxes that support 
/// multiple selection or no selection at all.
/// </summary>
/// <remarks>
/// selectedItems is the collection of selected ListItems.
/// </remarks>
public void RemoveFromSelection()
{
    // Return if the item is already selected.
    if (((ISelectionItemProvider)this).IsSelected)
        return;
    if (((ISelectionProvider)this).IsSelectionRequired & selectedItems.Count <= 0)
        throw new InvalidOperationException("Operation cannot be performed.");

    selectedItems.Remove(this);
    // TODO: Update UI.
}

''' <summary>
''' Removes the item from the selection in list boxes that support 
''' multiple selection or no selection at all.
''' </summary>
''' <remarks>
''' selectedItems is the collection of selected ListItems.
''' </remarks>
Public Sub RemoveFromSelection() Implements ISelectionItemProvider.RemoveFromSelection
    ' Return if the item is already selected.
    If (CType(Me, ISelectionItemProvider)).IsSelected Then
        Return
    End If
    If (CType(Me, ISelectionProvider)).IsSelectionRequired And selectedItems.Count <= 0 Then
        Throw New InvalidOperationException("Operation cannot be performed.")
    End If

    selectedItems.Remove(Me)
    ' TODO: Update UI.
End Sub

/// <summary>
/// Specifies whether the item is selected.
/// </summary>
/// <remarks>
/// selectedItems is the collection of selected ListItems.
/// </remarks>
public bool IsSelected
{
    get
    {
        return selectedItems.Contains(this);
    }
}

''' <summary>
''' Specifies whether the item is selected.
''' </summary>
''' <remarks>
''' selectedItems is the collection of selected ListItems.
''' </remarks>
Public ReadOnly Property IsSelected() As Boolean Implements ISelectionItemProvider.IsSelected
    Get
        Return selectedItems.Contains(Me)
    End Get
End Property

Comentarios

Envíe un objeto ElementRemovedFromSelectionEvent según corresponda.

Nota

Esta regla no depende de si el contenedor permite selecciones únicas o múltiples, o de qué método se usó para cambiar la selección. Solo importa el resultado.

Consulte también

• Implementación del patrón de control SelectionItem de UI Automation
• Ejemplo de proveedor de fragmentos