validating edit controls

[Guest]

Hi there, I know i can validate textboxes when i know the id but can i
validate the input to textboxes in a bound column? (i.e. they are
automatically turned into textboxes when i make that row the edititemindex).

I know i'll be able to if i turn them into itemtemplates but it is nice and
clean and simple as a bound control, so is there a way without using
itemtemplates?

I have another quick question. how do i control the width of the textbox in
a boundcolumn when going into edit mode? It seems to ignore ItemStyleWidth
and makes the boxes really long and my grid look a right mess!

Thanks