Sdílet prostřednictvím


ISelectionItemProvider.RemoveFromSelection Metoda

Definice

Odebere aktuální prvek z kolekce vybraných položek.

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

Příklady

Následující příklad kódu odebere položku z kolekce vybraných položek.

/// <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

Poznámky

Podle potřeby odešlete .ElementRemovedFromSelectionEvent

Poznámka

Toto pravidlo nezávisí na tom, jestli kontejner umožňuje jeden nebo více výběrů, ani na tom, jaká metoda byla použita ke změně výběru. Záleží jenom na výsledku.

Platí pro

Viz také