cell, an exception occurs and I get a run-time error.Alternately, if a user tries to insert a string into an integer column, they get a very long error message which isn't user friendly at all.It generates an error message when i type in the name of the item.The rest of the cell validations are perfectly working!So you may have to resort to making your own if you need to track "Is Dirty" on each row.But there is an event that comes with the native dirty settings, to log any changes you might need.I personally use a form-level property to keep track if I have any data edits/changes by using either of these events and if I do, I save the edits before closing the form.Data validation is fairly straightforward on the Win Forms Data Grid View.
This, therefore, undoes any action you perform in the handler.
What you have to do instead is change the value in the editing control (remembering not to cancel the event).
For example, for a Your response was great and saved me lots of time.
I think your situation is different, can you explain exactly what you are doing, like how do you provide the data source for gridview, which column type do you change at runtime that doesn't enter Why not then map the EF classes into DTOs or View Models?
Then you bind to simple objects, validate as soon or as late as you want, and get database/domain/whatever specific error when you map them back.
i think you are looking for datagrid view text box column validation right ?