Updating gridview with SqlDataSource in asp.net

Question

i want to update the records from the gridview using SqlDataSource, here is what i am doing.
below is my gridview markup

Answer 1

Found the solution: The Select Columns and the Update Parameters should match in order to update using SqlDataSource, that means if you select(query or procedure) is returning 3 fields in gridview, then all of them should be the parameter for the update, you can miss out the actual updations in database if not required, but the should have all the fields: say for example if below is my select query

SELECT USERNAME, MOBILENUMBER, EMAIL FROM USERS

then the update parameters should be

you cannot skip any of the parameters, even though you do not intend to update that field Hope this will help others, as i wasted lots of time researching on this.