Handling Database updates with a RadioButtonList inside an ASP.NET GridView

I have seen a couple of questions where users face issues while interacting with a RadioButtonList kept inside an ASP.NET GridView. On selecting one of the values of the RadioButtonList, the corresponding values should be updated in the database. For this, the respective row cell values and the radiobutton value should also be accessed, so as to update the correct row in the database corresponding to the row in the GridView. Let us see how. ...