DataGridView.RefreshEdit Method ()
Refreshes the value of the current cell with the underlying cell value when the cell is in edit mode, discarding any previous value.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
Call this method to force a cell to update its display value in edit mode. This is useful when an external process modifies the cell value and you want to notify the user of the change, even when a user-specified change is lost as a result.
Available since 2.0