Note that only the Cell Validating event can keep the editor active,when the validation fails and it does not allow the user to exit the cell until a valid value is filled.However, pressing the Esc key in this situation will revert the initial value of the cell and it will close the editor. The Row Validating event has a slightly different behavior.
This funtionality can be easily implemented by handling the Preview Key Down event, which will revert the row changes after pressing the Esc key.
Let's assume that the If the user enters empty string for a specific cell and tries to navigate to another row, the validation fails and the Error Text is displayed on the corresponding row.
At this point the user is not allowed to cancel the performed changes, pressing the Esc key.
Canceling this event prevents the user from exiting the cell until a valid value is entered or the edit process is canceled (via Esc key).
The Data Bound Item will be updated only if the cell is validated.
However, the user may prefer to validate all the data cells in a row at once.This scenario can be achieved by using the Row Validating event, which is fired when the user tries to change the current row (changing to another row or when the control loses focus).We regret to inform you that, the Events like Begin Edit, End Edit, Cell Validating and Row Validating will not be triggered for Grid Check Box Column in Sf Data Grid.In Grid Check Box Column, we loaded the Edit Element directly hence the above events are not supported in Grid Check Box Column.provides a convenient way to realize data validation before it is committed to the underlying data source.SOLUTION To achieve data validation prior the row is committed, you can handle the Cell Validating event, which is raised by the control when the current cell changes or when it goes out of edit mode.