public ActionResult Index(user usr)
        {
            //get username password form user)
            //check it with database user table

            Nirajan_Book_shopEntities3 dbObject = new Nirajan_Book_shopEntities3();
            var checkUser = dbObject.users.Where(l => l.u_name.Equals(usr.u_name) && l.u_password.Equals(usr.u_password)).FirstOrDefault();

            if (checkUser != null)
            {
                var loggeduser = dbObject.users.Where(l => l.u_name.Equals(usr.u_name)).FirstOrDefault();
                Session["u_name"] = loggeduser.u_name.ToString();
                Session["u_id"]   = loggeduser.u_id.ToString();
                Session["u_type"] = loggeduser.u_type.ToString();
                return(RedirectToAction("Dashboard"));
            }
            else
            {
                ViewBag.msg = "Invalid Username or Password";
                return(View());
            }
        }