ISelectionItemProvider.RemoveFromSelection Metod
Definition
Viktigt
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Tar bort det aktuella elementet från samlingen med markerade objekt.
public:
void RemoveFromSelection();public void RemoveFromSelection();abstract member RemoveFromSelection : unit -> unitPublic Sub RemoveFromSelection ()Exempel
Följande exempelkod tar bort objektet från en samling markerade objekt.
/// <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
Kommentarer
Skicka en ElementRemovedFromSelectionEvent efter behov.
Note
Den här regeln beror inte på om containern tillåter enkla eller flera val, eller vilken metod som användes för att ändra markeringen. Bara resultatet spelar roll.
