我正在使用Entity Framework4.1开发一个ASP.Net MVC3Web应用程序,对于使用数据注解进行表单验证,我感到有点困惑。我总是将ViewModel返回给视图,而不是传递实际的对象,因为我意识到这是一种糟糕的做法。例如:
public class ViewModelTeam
{
public Team Team { get; set; }
}
我的视图可能会有类似下面这样的内容
@model UI.ViewModels.ViewModelTeam
@Html.HiddenFor(model => model.Team.teamID)
<div class="editor-label">
@Html.LabelFor(model => model.Team.description)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Team.description)
@Html.ValidationMessageFor(model => model.Team.description)
</div>
为了验证这个视图,我在一个分部类中创建了数据注释,如下所示
[MetadataType(typeof(TeamMetaData))]
public partial class Team
{
public class TeamMetaData
{
[DisplayName("Team Name")]
[Required(ErrorMessage = "Please enter a Team Name")]
public object description { get; set; }
然后在我的create Controller中,我有这个
[HttpPost]
public ActionResult Create(Team team)
{
if (ModelState.IsValid)
{
//Add team and redirect
}
//Got this far then errors have happened
//Add Model State Errors
ViewModelTeam viewModel = new ViewModelTeam
{
Team = team
};
return View(viewModel);
}
现在,这种方法工作得很好,但是,我对ViewModels和验证了解得越多,就越觉得应该验证的是ViewModel,因为最终在视图中显示的是ViewModel,而不是对象。
因此,我更改了我的ViewModel,如下所示
public class ViewModelListItem
{
public int teamID { get; set; }
[DisplayName("Item Name")]
[Required(ErrorMessage = "Please enter a Team Name")]
public string description { get; set; }
我还将我的create Controller修改为
[HttpPost]
public ActionResult Create(Team team)
{
if (ModelState.IsValid)
{
//Add team and redirect
}
//Got this far then errors have happened
//Add Model State Errors
ViewModelTeam viewModel = new ViewModelTeam();
viewModel.description = team.description;
return View(viewModel);
}
同样,这是有效的,但我只是感觉第二种方法有点混乱,或者在第一种方法中效率不高。
我很有兴趣听听别人对此的看法。谢谢你的帮助,我为这么长的帖子道歉。
发布于 2012-03-27 22:00:58
我总是使用视图模型和AutoMapper来帮助我简化域和视图模型之间的映射。
查看模型:
public class TeamViewModel
{
[DisplayName("Team Name")]
[Required(ErrorMessage = "Please enter a Team Name")]
public string Description { get; set; }
}
然后是一个常用的模式:
public class TeamsController: Controller
{
public ActionResult Create()
{
var model = new TeamViewModel();
return View(model);
}
[HttpPost]
public ActionResult Create(TeamViewModel model)
{
if (!ModelState.IsValid)
{
return View(model);
}
Team team = Mapper.Map<TeamViewModel, Team>(model);
Repository.DoSomethingWithTeam(team);
return RedirectToAction("Success");
}
}
https://stackoverflow.com/questions/9891040
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