public ActionResult Edit(int id)
        {
            Dinners dinner = dinnerRepository.GetDinner(id);
return View(dinner);

        }

        [AcceptVerbs(HttpVerbs.Post)]
public ActionResult Edit(int id, FormCollection formValues)
        {
            Dinners dinner = dinnerRepository.GetDinner(id);

try
            {
                UpdateModel(dinner);//使用Controler内置的方法，通过反射来给Dinner对象赋值
                dinnerRepository.Save();
return RedirectToAction("Details", new { id = dinner.DinnerID });
            }
catch (Exception)
            {

foreach (var issue in dinner.GetRuleViolations())
                {
                    ModelState.AddModelError(issue.PropertyName, issue.ErrorMessage);
                }
return View(dinner);
            }
        }