public ActionResult Login(Admin_tbl ut)
        {
            if (ModelState.IsValid)
            {
                using (Exam_QuizEntities db = new Exam_QuizEntities())
                {
                    var log = db.Admin_tbl.FirstOrDefault(model => model.admin_name.Equals(ut.admin_name) && model.admin_password.Equals(ut.admin_password));
                    if (log != null)
                    {
                        Session["admin_name"] = log.admin_name;

                        return(RedirectToAction("AdminProfile", "Admin"));
                    }
                    else
                    {
                        ViewBag.Message = "Username or password incorrect";
                        Response.Write("<script> alert('User Name or Password is wrong')</script>");
                    }
                }
            }

            return(View());
        }