EntityType'MyProfile'没有定义键。 定义此EntityType的键

Question

我不知道为什么我收到此错误消息。 我在我的sql数据库中为它定义了一个主键。 这是我的代码：

[HttpPost]
    public ActionResult Register(RegisterModel model)
    {
        if (ModelState.IsValid)
        {
            // Attempt to register the user
            MembershipCreateStatus createStatus = MembershipService.CreateUser(model.UserName, model.Password, model.Email);

            if (createStatus == MembershipCreateStatus.Success)
            {

                FormsService.SignIn(model.UserName, false /* createPersistentCookie */);
                MembershipUser myObject = Membership.GetUser();
                Guid UserID = (Guid)myObject.ProviderUserKey;
                MyProfile profile = new MyProfile();
                profile.Address = model.Address;
                profile.City = model.City;
                profile.Zip = model.Zip;
                profile.State = model.State;
                profile.UserId = UserID;
                db.Profiles.Add(profile);
                return RedirectToAction("Index", "Home");
            }
            else
            {
                ModelState.AddModelError("", AccountValidation.ErrorCodeToString(createStatus));
            }
        }

        // If we got this far, something failed, redisplay form
        ViewBag.PasswordLength = MembershipService.MinPasswordLength;
        return View(model);
    }

这是我的MyProfile类：

   namespace MatchGaming.Models
{
    [Bind(Exclude = "ProfileId")]
    public class MyProfile
    {
        [ScaffoldColumn(false)]
        public int ProfileId { get; set; }

        public Guid UserId { get; set; }

        [DisplayName("Address")]
        public string Address { get; set; }

        [DisplayName("City")]
        public string City { get; set; }

        [DisplayName("Zip")]
        public string Zip { get; set; }

        [DisplayName("State")]
        public string State { get; set; }


    }
}

我不知道为什么我收到此错误： EntityType 'MyProfile' has no key defined. Define the key for this EntityType. EntityType 'MyProfile' has no key defined. Define the key for this EntityType. 当它试图添加到数据库db.Profiles.Add(profile); 。

Answer 1

哪个领域是你的关键？ 无论它是什么 - ProfileId或UserId - 将名称更改为MyProfileId或Id，或者在其上放置[Key]属性。

Answer 2

我也遇到了这个问题，并希望在Entity Framework版本6中添加此错误，因为DbgGeography类型已从程序集system.data.entity移动到entityframework.dll中

要在EF 6+中解决此问题，请删除对实体dll的引用，并将using语句更改为使用System.Data.Entity.Spatial

请参阅此http://entityframework.codeplex.com/workitem/1535