public ActionResult Del(int id)
        {
            MyOrder target = new MyOrder()
            {
                Id=id

            };
            DbEntityEntry entry=db.Entry(target);
            entry.State = System.Data.Entity.EntityState.Deleted;

            db.SaveChanges();
            return Json("OK");
        }
        public ActionResult Update(MyOrder model)
        {
            if (ModelState.IsValid == false)
            {
                return Content("数据有误~!请不要恶意禁用浏览器脚本~~~!");
            }
            else
            {
                int id = Convert.ToInt32(Request.Params["Id"]);
                String datetime = Request.Params["OrderDate"];

                String status = Request.Params["Status"];
                int customerId = Convert.ToInt32(Request.Params["CustomerId"]);
                MyOrder updated_order = (from x in db.MyOrders where x.Id == id select x).FirstOrDefault();
                updated_order.OrderDate = Convert.ToDateTime(datetime);
                updated_order.Status = status;
                updated_order.CustomerId = customerId;
                db.SaveChanges();
                return Redirect("/Order/Index");
            }
        }