asp.net-mvc – 帖子上的Mvc模型ID 0

我正在发布要查看的模型,因此在get请求中设置了Id属性.我的代码如下.

视图：

@model xandra.Models.ProjectModel

@using(Html.BeginForm())
{ 
    @Html.HiddenFor(m => m.Id) 
    @Html.LabelFor(m => m.Name)
    @Html.TextBoxFor(m => m.Name)

    <br />

    @Html.LabelFor(m => m.Description)
    @Html.TextAreaFor(m => m.Description)

    <br />

    @Html.LabelFor(m => m.Website)
    @Html.TextBoxFor(m => m.Website)

    <br />

    @Html.LabelFor(m => m.Active)
    @Html.CheckBoxFor(m => m.Active)

    <input type="submit" value="Save" />
}

控制器：

[Authorize]
[HttpGet]
[InitializeSimpleMembership]
public ActionResult EditProject(string id)
{
    using (var entity = new dixraContext())
    {
        var project = entity.Projects.FirstOrDefault(m => m.UrlName == id);


        return View(project);
    }
}

[Authorize]
[HttpPost]
[InitializeSimpleMembership]
public ActionResult EditProject(ProjectModel model)
{
    using (var entity = new dixraContext())
    {
        var project = entity.Projects.FirstOrDefault(m => m.Id == model.Id);

        project.Name = model.Name;
        project.Description = model.Description;
        project.Website = model.Website;
        project.Tags = model.Tags;
        project.Active = model.Active;

        entity.SaveChanges();

        return RedirectToAction("GetProject",project.UrlName);
    }
}

而我的模特

public class ProjectModel
{
    [Key]
    [Required]
    public long Id { get; set; }

    [Required(AllowEmptyStrings=false)]
    public string Name { get; set; }

    [Required(AllowEmptyStrings=false)]
    public string Description { get; set; }

    [Required]
    public DateTime CreatedDate { get; set; }

    [Required]
    public int Creator { get; set; }

    public string Website { get; set; }

    [Required]
    public int CategoryId { get; set; }

    public virtual List<TagModel> Tags { get; set; }

    public string UrlName { get; set; }

    public bool Active { get; set; }
}