http://www.developerscode.com/search/label/Gridview

http://www.developerscode.com/search/label/Gridview

Show ModalPopUp to Edit Asp.net Gridview Row Values Without using AjaxControlToolkit

http://techbrij.com/show-modal-popup-edit-aspdotnet-gridview

Asp.net sample Projects for Reference

http://techbrij.com/projects/

Insert, Update, Delete in ASP.NET Gridview With Entity Framework

http://techbrij.com/insert-update-delete-gridview-entity-framework

client side validations

http://www.developerscode.com/2011/02/client-side-validations-using.html