IEditableCollectionView.CancelNew Method

Ends the add transaction and discards the pending new item.

Namespace:  System.ComponentModel
Assembly:  WindowsBase (in WindowsBase.dll)

void CancelNew()

The following example displays a form that prompts the user to add a new item. If the user submits the form, the example calls CommitNew to add the item to the collection. If the user cancels the form, the example calls CancelNew to discard the item. For the entire sample, see Changing a Collection by Using IEditableCollectionView Sample.

            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();
            }

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5 SP1, 3.0 SP2

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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