Using built in 'edit' and 'delete' buttons in gridview. ASP.NET C#

[boebchen]

I have a workout database where some data from most of the tables is pulled and outputted to a gridview. I have taken a screenshot of my gridview output for reference.http://postimage.org/image/vncyu4oet/As you see I have the 'edit' and 'delete' buttons on the table. There are two main things that I want to know how to do, and I have probed all over the web and haven't been able to find a solution.1) When I click 'edit' I want only one row to be affected (which I have working), and I also want only certain cells to have the ability to be edited (namely the Date, Workout Name, Weight, and Repetitions), while the other ones can't be. Is there a way to restrict that? Lastly, once the user inputs data, how do I then update the multiple tables all at once? I have seen code on how to edit just one table, but my gridview pulls data from multiple tables like I said.2) When clicking 'delete' I just want that row to be affected, not all the other rows that have a matching date, matching workout name, etc.Any help is appreciated!!