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In a lot of books and articles that I've read on this control, it seems to suggest that the appropriate event to handle for this is the Cell Validating one. However, this event triggers a bit too often for my tastes and I'm not sure it is required.
For example, this event triggers everytimes the users switches to another row.
However, this event is fired every time the user leaves the cell, regardless of whether or not it has changed.
Does Cell Value Changed support a sort of cancel or rollback method to the previous value?
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.
To make it more clear when I press Enter for the second time.This way I would be able to still validate the data, but not waste time with cells that didn't need it, but would prefer not to sacrifice the ability to restore the cell if data is invalid.Here is a bit of code: Assuming its an int,if its another datatype then will also work(except offcourse the variables oldvalue and newvalue must be that type also).On the other hand, the Cell Value Changed event seems to trigger only when the value of the cell changes, which means the validation code runs only when the value changes and not everytime a user changes cells.Now, since so many books use the Cell Validating event, I wonder if there is not any gotcha (in display for example) with using the Cell Value Changed?