ISelectionItemProvider.RemoveFromSelection Metodo

  • Riferimento

Definizione

Spazio dei nomi:
System.Windows.Automation.Provider
Assembly:
UIAutomationProvider.dll

Rimuove l'elemento corrente dalla raccolta di elementi selezionati.

public:
 void RemoveFromSelection();
public void RemoveFromSelection ();
abstract member RemoveFromSelection : unit -> unit
Public Sub RemoveFromSelection ()

Esempio

Il codice di esempio seguente rimuove l'elemento da una raccolta di elementi selezionati.

/// <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

Commenti

Inviare un oggetto ElementRemovedFromSelectionEvent in base alle esigenze.

Nota

Questa regola non dipende dal fatto che il contenitore consenta selezioni singole o multiple o su quale metodo è stato usato per modificare la selezione. Solo il risultato è importante.

Si applica a

Vedi anche