I have found this example here - Our grid is always in edit mode, by default and we will use data-source to bind the values in tag-box which might be searchable.
Row Updating event, doesn’t work as all samples say it should do.
In this case you have the option of catching the update event before the database update happens (method is triggered after the Grid View’s update event has happened.
This can be a useful opportunity to save information to a historical record.
All samples of course assume you’re doing everything in your page, but I have to do everything in my code-behind, because on forehand I don’t know what I’ll be binding to my Grid View.
Check out what I’m trying to do, maybe you can help?