how to add textbox in the GridView and send its data to DB?

Hi Every body, I hope you are just fine,

can you please help with this ..

I want to put a table with a list of students (from database) and in each row I want to have an empty textbox so the user will enter their GPA one by one. after that the user will press a button, and all GPAs will be inserted in a specific table (not the same one for students).

so please, can anybody help me to figure out how to add those textboxes to gridview control, and how to send the values depending on their student id.

Thank you very much

The Programmer