I have a datagridview and use the dataError event to display errors about null values, and primary key constraint problems. This works fine, but a newly added check constraint was added, to prevent data, and only allowing values (for example) 00-99 in.

The Datagridview.dataerror event is not firing off when I try to enter a value such as 'ab'. I catch this error, and display it to the user, but can not do
e.cancel
int he spot where I catch the error.

How can I enable CHECK constraints with my dataset, for it seems to not fire off the dataError event.. :(