ISelectionItemProvider.AddToSelection Metode

Definisi

Ruang nama:

System.Windows.Automation.Provider

Rakitan:

UIAutomationProvider.dll

Menambahkan elemen saat ini ke kumpulan item terpilih.

public:
 void AddToSelection();

public void AddToSelection ();

abstract member AddToSelection : unit -> unit

Public Sub AddToSelection ()

Contoh

Contoh kode berikut menambahkan item ke kumpulan item yang dipilih.

/// <summary>
/// Adds an item to the selection for list boxes that 
/// support multiple selection.
/// </summary>
/// <remarks>
/// In a single-selection list box, AddToSelection() is 
/// equivalent to Select().
/// selectedItems is the collection of selected ListItems.
/// </remarks>
public void AddToSelection()
{
    // Return if the item is already selected.
    if (((ISelectionItemProvider)this).IsSelected)
        return;
    selectedItems.Add(this);
    // TODO: Update UI.
}

''' <summary>
''' Adds an item to the selection for list boxes that 
''' support multiple selection.
''' </summary>
''' <remarks>
''' In a single-selection list box, AddToSelection() is 
''' equivalent to Select().
''' selectedItems is the collection of selected ListItems.
''' </remarks>
Public Sub AddToSelection() Implements ISelectionItemProvider.AddToSelection
    ' Return if the item is already selected.
    If (CType(Me, ISelectionItemProvider)).IsSelected Then
        Return
    End If
    selectedItems.Add(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

Jika hasil panggilan ke AddToSelection adalah bahwa satu item dipilih, maka kirim ElementSelectedEvent untuk elemen tersebut; jika tidak, kirim ElementAddedToSelectionEvent atau ElementRemovedFromSelectionEvent yang 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