You could expose security holes or corrupt your own data using general exception handling like this.
Also i noticed one thing if i Auto Generate the Columns All events are fired without any problems but if i use Template Field only Edit Event is fired that is only once.
On Row Deleting - can call registered event handlers" I couldnt figure out how to continue this thread, but the issues in it are related so i'm including it as a reference.
In my custom grid View control I cannot raise the Row Updated event.
I have set the requisite attributes in the Grid View tag.