在Identity Custom User之后，User.Identity.GetUserId()返回错误的类型作为字符串 [英] After Identity Custom User , User.Identity.GetUserId() returns wrong type as string

问题描述

我为实体框架和asp.net身份创建了自定义用户模型. 我在这里检查了其他答案，它们与我的问题很接近，但是答案不符合我的要求.所以我在这里问.

I created custom User model for entity framework and asp.net identity. I checked other answers in here, they are close to my question but answers not apply my requirement. so i am asking here.

一切都很好. 但是当我尝试获取用户ID时:

Everything is ok. But when i try to get user id like :

 ApplicationUser user = await manager.FindByIdAsync(User.Identity.GetUserId());

User.Identity.GetUserId()返回字符串.我像Guid一样配置它.但它返回字符串:(

User.Identity.GetUserId() return string. I configured it like Guid. But it returns string :(

我的课在这里. 请帮助我，如何在Web api控制器中以Guid的形式获取User.Identity.GetUserId()?

My classes are here. Please help me, how can i get User.Identity.GetUserId() in a web api controller as Guid ?

public class GuidUserLogin : IdentityUserLogin<Guid>
    {
    }


    public class GuidUserRole : IdentityUserRole<Guid>
    {
    }

    public class GuidUserClaim : IdentityUserClaim<Guid>
    {
    }

    public class GuidRole : IdentityRole<Guid, GuidUserRole>
    {
    }

//public class GuidUserContext : IdentityDbContext<ApplicationUser, GuidRole, Guid, GuidUserLogin, GuidUserRole, GuidUserClaim> { }
    public class GuidUserStore : UserStore<ApplicationUser, GuidRole, Guid, GuidUserLogin, GuidUserRole, GuidUserClaim>
    {
        public GuidUserStore(DbContext context)
            : base(context)
        {
        }
    }

    public class GuidRoleStore : RoleStore<GuidRole, Guid, GuidUserRole>
    {
        public GuidRoleStore(DbContext context)
            : base(context)
        {
        }
    }


    public class ApplicationUser : IdentityUser<Guid, GuidUserLogin, GuidUserRole, GuidUserClaim>, ICreateDateRequired
    {
        public ApplicationUser()
        {


        }

        [Key]
        public Guid UserId { get; set; }

        public override Guid Id { get; set; }

        public override string UserName { get; set; }
        public string Name { get; set; }
        public string Surname { get; set; }

        public string Password { get; set; }

        //Matching Attributes

        public override string Email { get; set; }
        public string FacebookId { get; set; }
        public string TwitterId { get; set; }
        public string GoogleId { get; set; }
        public override string PhoneNumber { get; set; }

        public string SocialAccessToken { get; set; }

        public string Gender { get; set; }

        public virtual List<Shade> Shades { get; set; }

        [InverseProperty("ParentUser")]
        public virtual List<UserFriendship> Friends { get; set; }

        public virtual List<Contact> Contacts { get; set; }

        //[Column(TypeName = "DateTime2")]
        //[DatabaseGenerated(DatabaseGeneratedOption.Computed)]
        public DateTime? CreateDate { get; set; }

        public string ImageUrl { get; set; }
        public string ThumbUrl { get; set; }
        public string BackUrl { get; set; }

        public virtual List<ContactDetail> UserContactDetails { get; set; }
    }

推荐答案

GetUserId的定义是:

The definition of GetUserId is this:

public static string GetUserId(this IIdentity identity);
public static T GetUserId<T>(this IIdentity identity) where T : IConvertible;

很遗憾，Guid不是IConvertible，并且不会以通用形式返回Guid类型.因此，我们不能使用:User.Identity.GetUserId()<Guid>，因为某些人在将ID更改为Int时会使用User.Identity.GetUserId()<Int>.

Unfortunately Guid is not an IConvertible and it will not return the Guid type in the Generic form. Therefore, we can not use: User.Identity.GetUserId()<Guid> as some people use User.Identity.GetUserId()<Int> when they change the ID to Int.

因此，您应该使用Guid.Parse()或Guid.TryParse()

Guid.Parse(User.Identity.GetUserId())

@Erik方法工作正常，但是由于我不想覆盖原始方法，所以添加了以下常规扩展名:

@Erik method works fine, But As I did not wanted to override the original one, I added the following general extension:

 public static class ExtensionMethods
{
    public static Guid ToGuid(this string value)
    {
        Guid result= Guid.Empty;
        Guid.TryParse(value, out result);
        return result;          
    }
}

然后我用这个:

User.Identity.GetUserId().ToGuid()

我想出了另一种解决方案:

我向Identity对象添加了扩展名.

I added an extension to the Identity object.

public static class IdentityExtensions
{
    public static Guid GetGuidUserId(this IIdentity identity)
    {
        Guid result = Guid.Empty;
        Guid.TryParse(identity.GetUserId(), out result);
        return result;
    }   
}

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