ISelectionItemProvider.RemoveFromSelection Methode

Definitie

Naamruimte:
System.Windows.Automation.Provider
Assembly:
UIAutomationProvider.dll

Hiermee verwijdert u het huidige element uit de verzameling geselecteerde items.

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

Voorbeelden

Met de volgende voorbeeldcode wordt het item verwijderd uit een verzameling geselecteerde items.

/// <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

Opmerkingen

Verzend een ElementRemovedFromSelectionEvent indien nodig.

Note

Deze regel is niet afhankelijk van of de container enkele of meerdere selecties toestaat, of welke methode is gebruikt om de selectie te wijzigen. Alleen het resultaat is belangrijk.

Van toepassing op

Zie ook