IEditableCollectionView.EditItem(Object) Metoda

Definice

Obor názvů:

System.ComponentModel

Sestavení:

WindowsBase.dll

Zahájí transakci úprav zadané položky.

public:
 void EditItem(System::Object ^ item);

public void EditItem (object item);

abstract member EditItem : obj -> unit

Public Sub EditItem (item As Object)

Parametry

item

Object

Položka, kterou chcete upravit.

Příklady

Následující příklad vytvoří formulář, který uživatele vyzve k úpravě existující položky. Pokud uživatel formulář odešle, změny se potvrdí v kolekci. Pokud uživatel formulář zruší, změny se zahodí. Celou ukázku najdete v tématu Změna kolekce pomocí ukázky IEditableCollectionView .

IEditableCollectionView editableCollectionView =
            itemsControl.Items as IEditableCollectionView;

// Create a window that prompts the user to edit an item.
ChangeItemWindow win = new ChangeItemWindow();
editableCollectionView.EditItem(itemsControl.SelectedItem);
win.DataContext = itemsControl.SelectedItem;

// If the user submits the new item, commit the changes.
// If the user cancels the edits, discard the changes. 
if ((bool)win.ShowDialog())
{
    editableCollectionView.CommitEdit();
}
else
{
    // If the objects in the collection can discard pending 
    // changes, calling IEditableCollectionView.CancelEdit
    // will revert the changes. Otherwise, you must provide
    // your own logic to revert the changes in the object.
    
    if (!editableCollectionView.CanCancelEdit)
    {
        // Provide logic to revert changes.
    }

    editableCollectionView.CancelEdit();
}

Dim editableCollectionView As IEditableCollectionView = TryCast(itemsControl.Items, IEditableCollectionView)

' Create a window that prompts the user to edit an item.
Dim win As New ChangeItemWindow()
editableCollectionView.EditItem(itemsControl.SelectedItem)
win.DataContext = itemsControl.SelectedItem

' If the user submits the new item, commit the changes.
' If the user cancels the edits, discard the changes. 
If CBool(win.ShowDialog()) Then
    editableCollectionView.CommitEdit()
Else
    ' If the objects in the collection can discard pending 
    ' changes, calling IEditableCollectionView.CancelEdit
    ' will revert the changes. Otherwise, you must provide
    ' your own logic to revert the changes in the object.

    If Not editableCollectionView.CanCancelEdit Then
        ' Provide logic to revert changes.
    End If

    editableCollectionView.CancelEdit()
End If