我使用以下方法:
[HttpPost]
public ActionResult Update(UserViewModel uvm)
{
User user = _userRepository.FindById(uvm.Id);
user.Forename = uvm.Forename;
user.Surname = uvm.Surname;
user.EmailAddress = uvm.EmailAddress;
_userRepository.Update(user);
return RedirectToAction("Index");
}
UPDATE:
为了解决有关的评论AutoMapper
操作方法如下:
我们以以下类为例:
public class UserViewModel
{
public string Forename { get; set; }
public string Surname { get; set; }
public string EmailAddress { get; set; }
}
public class User
{
public string Forename { get; set; }
public string Surname { get; set; }
public string EmailAddress { get; set; }
public string Password { get; set; }
}
我们不想在 UI 中修改用户密码。所以我们向AutoMapper表达我们的意图:
Mapper
.CreateMap<UserViewModel, User>()
.ForMember(dest => dest.Password, opt => opt.Ignore());
进而:
[HttpPost]
public ActionResult Update(UserViewModel uvm)
{
// Fetch the original model we would like to update
User user = _userRepository.FindById(uvm.Id);
Mapper.Map(uvm, user);
// At this stage the user model will have its
// Forename, Surname and EmailAddress properties
// updated from the view model and its Password property
// will remain the one we got from the repository
_userRepository.Update(user);
return RedirectToAction("Index");
}
更新2:
为了解决评论中有关配置 AutoMapper 的问题,我通常使用配置文件:
public class UsersProfile : Profile
{
protected override void Configure()
{
Mapper
.CreateMap<UserViewModel, User>()
.ForMember(dest => dest.Password, opt => opt.Ignore());
Mapper
.CreateMap<User, UserViewModel>();
}
}
然后有一个注册所有映射器的注册表类:
public class MappingsRegistry
{
public static void Configure()
{
Mapper.AddProfile(new UsersProfile());
Mapper.AddProfile(new SomeOtherProfile());
...
}
}
这被称为Application_Start
:
MappingsRegistry.Configure();
最后我的控制器有一个对映射引擎的引用:
public class UsersController : Controller
{
private readonly IUsersRepository _repository;
private readonly IMappingEngine _mappingEngine;
public ContratsFCController(IUsersRepository repository, IMappingEngine mapperEngine)
{
_repository = repository;
_mapperEngine = mapperEngine;
}
[AutoMap(typeof(User), typeof(UserViewModel))]
public ActionResult Update(int id)
{
var user = _repository.FindById(id);
return View(user);
}
[HttpPost]
public ActionResult Update(UserViewModel uvm)
{
if (!ModelState.IsValid)
{
return View(uvm);
}
var user = _repository.FindById(uvm.Id);
_mapperEngine.Map(uvm, user);
_repository.Update(user);
return RedirectToAction("Index");
}
}
现在剩下的就是指示您的 DI 框架传递Mapper.Engine
构造函数的属性和在单元测试中显然用适当的模拟替换它们。