Hi,

I've coded a templated column that will add a column of asp:Checkboxes 
including an asp:checkbox on the column header, to a gridview. The checkbox 
on the column header has Auto-postingback enabled and I've added an event 
hanlder to handle the CheckChanged event. I've put some code to the 
CheckChanged event hanlder. The templated column column is very simple 
doesnt do anything other than mentioned above.

If I add this templated column on fly to a gridview which is also built 
dynamically, then CheckChanged event handlder fires when I tick/untick the 
column header checkbox, so no problem.

But if I add this templated column on fly to a gridview added to the page in 
the designmode, then CheckChanged event handler fires only when I tick the 
checkbox on the column header. Event hanlder is not called when I untick the 
checkbox.

Anybody know reason to this behavior? How to change this behavior?

Dev