ISelectionItemProvider.RemoveFromSelection Metode

Definisi

Ruang nama:

System.Windows.Automation.Provider

Rakitan:

UIAutomationProvider.dll

Menghapus elemen saat ini dari kumpulan item terpilih.

public:
 void RemoveFromSelection();

public void RemoveFromSelection ();

abstract member RemoveFromSelection : unit -> unit

Public Sub RemoveFromSelection ()

Contoh

Contoh kode berikut menghapus item dari kumpulan item yang dipilih.

/// <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

Keterangan

Kirim yang ElementRemovedFromSelectionEvent sesuai.

Catatan

Aturan ini tidak bergantung pada apakah kontainer mengizinkan satu atau beberapa pilihan, atau pada metode apa yang digunakan untuk mengubah pilihan. Hanya hasilnya yang penting.

Lihat juga

• Menerapkan Pola Kontrol SelectionItem UI Automation
• Sampel Penyedia Fragmen