dataGridView manual modification

hi every body,

this is my first ask in this forum, i program with asp.net since 1 year and for me MS.Net is the biggest and the best environment of developement. And i just begin with Windows Forms.

i have a little problem with dataGridView, i wanna recuperate the informations in of the selected line in many texbox..
So i have a dataGridView in my form

ps: i don't wanna use the automatic update, delete ... generated by the application 

for example when i select a line with ID=5 , then i click in the Button( Edit informations )

i want to recuperate the informations ( Id=5 , Nom=aaaaa, Prenom=bbbbb....) in many text boxes ( Id in textbox1 , Nom in textbox2 .....)

i feel that the response is very easy :s but i don't know how to resolve this problem !
Thank you.