public ActionResult Index()
        {
            ViewBag.Message = "Welcome to ASP.NET MVC!";
           // ViewData.Model = _db.userSet.ToList();
            Models.userEntities de = new Models.userEntities();
            //创建新对象
            Models.user user = new Models.user();
            user.uname = "xxx";

            user.uemmail = "sdfsdf";

            de.AddTouserSet(user);//添加数据到集合
            de.SaveChanges();//将数据添加到数据库
            return View();
        }