DataGrid.CancelEdit Method (DataGridEditingUnit)
Causes the data grid to cancel the current edit, restore the original value, and exit editing mode.
Assembly: System.Windows.Controls.Data (in System.Windows.Controls.Data.dll)
By default, you can edit items directly in the DataGrid. You manually cancel a cell edit by pressing ESC one time, and cancel all edits in a row by pressing ESC two times. To guarantee that edits can be committed and canceled correctly, the objects in the DataGrid must implement the IEditableObject interface. Alternatively, you can set the IsReadOnly property to true to disable editing in the DataGrid.
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.