public ActionResult Edit(EditUser model)
 {
     if (ModelState.IsValid)
     {
         User user = userService.GetUserById(model.Id);
         user.Password = model.Password;
         userService.UpdateUser(user);
         return RedirectToAction("Index").AndNotice("密码修改成功!");
     }
     return View(model);
 }
 //修改密码
 public ActionResult Edit(int id)
 {
     EditUser editUser = new EditUser();
     editUser.Id = id;
     return View(editUser);
 }