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我正在使用 EF + MVC3 + razor 我有我的 userProfile 模型类,其中包含名称、姓氏变量 + 外键爱好(因为我想将其视为下拉列表)我创建了一个控制器,只需选择这个类和数据上下文。

当我尝试创建记录时,它不允许我,因为它在验证区域中说:“爱好字段是必需的。”。我希望不需要“爱好”下拉菜单。我怎样才能做到这一点?!..

这就是我所拥有的:

模型:

public class UserProfile    {
    [Key]
    public int Id { get; set; }
    [Required]
    public string Name { get; set; }
    [Required]
    public string Surname { get; set; }

    public int HobbiesId { get; set; }
    public virtual Hobby Hobby { get; set; }}

public class Hobby
{
    public int HobbiesId { get; set; }
    public string HobbieName { get; set; }
    public virtual ICollection<UserProfile> UserProfiles { get; set; } 
}

 public class UserProfileDBContext : DbContext
{
    public DbSet<UserProfile> UserProfiles { get; set; }
    public DbSet<Hobby> Hobbies{ get; set; }
 }

看法:

[..]@using (Html.BeginForm()) {
@Html.ValidationSummary(true)
<fieldset>
    <legend>UserProfile</legend>

    <div class="editor-label">
        @Html.LabelFor(model => model.Name)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.Name)
        @Html.ValidationMessageFor(model => model.Name)
    </div>

    <div class="editor-label">
        @Html.LabelFor(model => model.Surname)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.Surname)
        @Html.ValidationMessageFor(model => model.Surname)
    </div>

    <div class="editor-label">
        @Html.LabelFor(model => model.HobbyId, "Hobby")
    </div>
    <div class="editor-field">
        @Html.DropDownList("HobbyId", String.Empty)
        @Html.ValidationMessageFor(model =>  model.HobbyIdId)
    </div>
[..]

控制器的创建是:

   [HttpPost]
    public ActionResult Create(UserProfile userprofile)
    {
        if (ModelState.IsValid)
        {
            db.UserProfiles.Add(userprofile);
            db.SaveChanges();
            return RedirectToAction("Index");  
        }

        ViewBag.HobbyId = new SelectList(db.Hobbies, "HobbyId", "Hobby", userprofile.HobbyId);
 return View(userprofile); }

我已经尝试修改:

 public class Hobby
{
    public int ?HobbiesId { get; set; }

但它没有用。

有什么帮助吗?...

提前致谢!..

即插即用

4

1 回答 1

1

添加外键约束,如下图:

 public int? HobbiesId { get; set; }
 [ForeignKey("HobbiesId")]
于 2012-10-30T07:45:00.783 回答