protected void RadGrid1_UpdateCommand(object sender, GridCommandEventArgs e)
{
GridEditableItem editedItem = e.Item as GridEditableItem;
string StudentID = editedItem.GetDataKeyValue("StudentID").ToString().Trim(); // Works if you set the DataKeyValue as CustomerID
string name = (editedItem["StudentName"].Controls[0] as TextBox).Text;
string address = (editedItem["Address"].Controls[0] as TextBox).Text;
string DOB = (editedItem["DOB"].Controls[0] as TextBox).Text;
string phoneNo = (editedItem["PhoneNo"].Controls[0] as TextBox).Text;
AbcDAL MyDAL = new AbcDAL("");
MyDAL.UpdStudentMaster(StudentID, name, phoneNo, address, Convert.ToDateTime(DOB));
}