ASP.Net MVC 3 ViewModel数据注释



我正在用Entity Framework 4.1开发一个ASP.Net MVC 3 Web应用程序,我对使用数据注释进行表单验证有点困惑。我总是将ViewModel返回到View,而不是传递实际对象,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于的内容

@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,我在一个类似的部分类中创建了数据注释

[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; }

然后在我创建的控制器中,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,这很好,但是,我读得越多关于ViewModel和验证的内容,就越觉得应该验证的是ViewModel,因为归根结底,在视图中显示的是ViewModels,而不是对象。

因此,我将ViewModel更改为如下

public class ViewModelListItem
{
    public int teamID { get; set; }
    [DisplayName("Item Name")]
    [Required(ErrorMessage = "Please enter a Team Name")]
    public string description { get; set; }

我还把我创建的控制器改成了这个

[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();
     viewModel.description = team.description;
        return View(viewModel);
    }

同样,这是有效的,但我只是觉得第二种方法有点混乱,或者在第一种方法中效率不高。

我很想听听其他人对此的看法。谢谢你的帮助,我为这么长的帖子道歉。

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。

视图模型:

public class TeamViewModel
{
    [DisplayName("Team Name")]
    [Required(ErrorMessage = "Please enter a Team Name")]
    public string Description { get; set; }
}

然后是一种常用的模式:

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");
    }
}

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