Hi

MVC is an Architecture developed on top of .NET Framework.
Where they have concept of Model which is your databse 
related stuff, and View Which is presenter (.aspx) files 
and Controller (Which controles the action of your 
application this is something from your regulat asp.net 
website...
Controller tells what to do and when to do and here the 
concept of Postback is not there any more...neither you 
have the facility of ViewState......

This is one reason you may not be able to use your grid 
view as effectively as earlier in asp.net 
website/applications (when you are using MVC)...

As there is no postaback concept any more between client 
and server it makes it possible to test your controller 
actions even when your application is not running (F5)....

Hence this helps us do Test Driven Development of the 
application...where you can write Test Cases first and then 
do the development as it can be tested offline......

You may not be able to include Unit Test Project if you are 
using Visual Web Developer as for this you need VS 
2008....And MVC installed in your machine.....

For grid view you can refer to 
http://blog.maartenballiauw.be/post/2008/06/Code-based-
ASPNET-MVC-GridView.aspx....it might help...

All the best