IEditableCollectionView.AddNew 方法

定義

將新項目加入至集合中。

public:
 System::Object ^ AddNew();
public object AddNew ();
abstract member AddNew : unit -> obj
Public Function AddNew () As Object

傳回

已加入至集合的新項目。

範例

下列範例會建立 , Window 提示使用者新增專案。 然後它會呼叫 AddNew 以建立新的 物件,並將的 Window 設定DataContext為該物件。 如需整個範例,請參閱 使用 IEditableCollectionView 範例變更集合

IEditableCollectionView editableCollectionView = 
    itemsControl.Items as IEditableCollectionView; 

if (!editableCollectionView.CanAddNew)
{
    MessageBox.Show("You cannot add items to the list.");
    return;
}

// Create a window that prompts the user to enter a new
// item to sell.
ChangeItemWindow win = new ChangeItemWindow();

//Create a new item to be added to the collection.
win.DataContext = editableCollectionView.AddNew();

// If the user submits the new item, commit the new
// object to the collection.  If the user cancels 
// adding the new item, discard the new item.
if ((bool)win.ShowDialog())
{
    editableCollectionView.CommitNew();
}
else
{
    editableCollectionView.CancelNew();
}
Dim editableCollectionView As IEditableCollectionView = TryCast(itemsControl.Items, IEditableCollectionView)

If Not editableCollectionView.CanAddNew Then
    MessageBox.Show("You cannot add items to the list.")
    Return
End If

' Create a window that prompts the user to enter a new
' item to sell.
Dim win As New ChangeItemWindow()

'Create a new item to be added to the collection.
win.DataContext = editableCollectionView.AddNew()

' If the user submits the new item, commit the new
' object to the collection.  If the user cancels 
' adding the new item, discard the new item.
If CBool(win.ShowDialog()) Then
    editableCollectionView.CommitNew()
Else
    editableCollectionView.CancelNew()
End If

備註

呼叫 AddNew 會開始新增交易。 您應該呼叫 CommitNewCancelNew 結束新增交易。 新的專案一律會出現在集合檢視中。 呼叫 時 CommitNew ,任何套用至檢視的篩選、排序或群組,都套用至新專案。

適用於