inserting textbox in gridview in asp using c#

Question

hai friends,


          please help me in inserting a textbox in a gridview in asp using C#

when i enter data in the textbox that particular data has to be stored in the database based on the columns below

name	address	marks
chiranjeevi	mdp	textbox1
venu	mdpo	textbox2
naveen	vzm	textbox3
ravi	zzm	textbox4
raju	hyd	textbox5

.

name	address	marks
chiranjeevi	mdp	20
venu	mdpo	19
naveen	vzm	18
ravi	zzm	17
raju	hyd	16

so the marks entered in textbox1 one has to be stored in corresponding fields in database