Rowupdating aspxgridview c

What I am trying to do is set the Update Command in an Sql Data Source then update using that command.The event is firing okay, but when the event is done it appears that the row never updates.I have a second grid in which I used the code below to obtain the row that has been updated.

w=230" data-large-file="https://taditdash.files.wordpress.com/2014/06/gridview-on-browser.png? w=230" src="https://taditdash.files.wordpress.com/2014/06/gridview-on-browser.png? w=800" alt="Grid View on Browser" class="size-full wp-image-335" srcset="https://taditdash.files.wordpress.com/2014/06/230w, https://taditdash.files.wordpress.com/2014/06/gridview-on-browser.png?tbl Set Marks: Class, Section, Admission No, Subject ID, Subject Code, Max Marks, Marks I want to update marks inside gridview using edit command button.when I update the record It performs updation on the above row instead of desired row.w=150 150w, https://taditdash.files.wordpress.com/2014/06/gridview-cell-showing-updated-value.png? w=300 300w" sizes="(max-width: 416px) 100vw, 416px" /Event. If we move our mouse on to the variables, which hold the cell values, we can see the old value instead of new updated value (Refer the debugging Screen Shot at the Top).