public string Register(User model)
        {
            string strResultado = "ok";
            try
            {
                storeDB.Users.Add(model);
                storeDB.SaveChanges();
            }
            catch (Exception ex)
            {

                strResultado = "Error al registrar" + ex.Message;
            }

            // If we got this far, something failed, redisplay form
            return strResultado;
        }
        public JsonResult VerificaLogeo()
        {
            User objUser = new User();

            if (Session["userId"] == null)
            {
                objUser = null;
            }
            else
            {
                objUser = storeDB.Users.AsEnumerable()
               .Where(w => w.User_id == Convert.ToInt32(Session["userId"]))
               .Select(s =>new User()
               {
                   User_id = s.User_id,
                   UserName = s.UserName,
                   Email = s.Email,
                   Password = s.Password

               }).SingleOrDefault();
            }

            return Json(objUser);
        }