如何另一个Propertys加入User.Identity从表AspNetUsers身份2.2.1 [英] How to Add another Propertys to User.Identity From table AspNetUsers in identity 2.2.1

问题描述

我添加了一些新的属性，asp.net身份2.2.1（AspNetUsers表）code首先

i Add some new property to asp.net identity 2.2.1 (AspNetUsers table) code first

 public class ApplicationUser : IdentityUser
    {
        public string AccessToken { get; set; }

        public string FullName { get; set; }

        public string ProfilePicture { get; set; }


        public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUser> manager)
        {
            // Note the authenticationType must match the one defined in CookieAuthenticationOptions.AuthenticationType
            var userIdentity = await manager.CreateIdentityAsync(this, DefaultAuthenticationTypes.ApplicationCookie);
            // Add custom user claims here

            return userIdentity;
        }
    }

好了，现在我要打电话头像像这样code：
User.Identity.ProfilePicture;

Ok , Now I want to Call Profile Picture such as this code : User.Identity.ProfilePicture;

的解决方案是：

您需要创建实现IIdentity的自己的类和
  IPrincipal的。然后将它们分配在你的Global.asax
  OnPostAuthenticate。

You need to create your own classes that implement IIdentity and IPrincipal. Then assign them in your global.asax in OnPostAuthenticate.

但我不知道如何做到这一点！如何创建实现的IIdentity和IPrincipal的我自己的类。然后在OnPostAuthenticate您的Global.asax分配。
谢谢 。

But I dont know How to do this !! how to create my own classes that implement IIdentity and IPrincipal. Then assign them in your global.asax in OnPostAuthenticate. Thanks .

推荐答案

您有2个选项（至少）。首先，设置你的附加属性为索赔时，然后在用户登录读取索赔每次需要时间。其次，每个你所需要的属性时从存储（DB）读取。虽然我建议索赔为基础的方法，这是更快，我将使用扩展方法告诉你这两个办法。

You have 2 option (at least). First, set your additional property as a claim when user logs in then read the property from the claim each time you need. Second, each time you need the property read it from the storage (DB). While I recommend the claim based approach, which is faster, I will show you both way by using extension methods.

第一种方法：

在放像这样 GenerateUserIdentityAsync 方法，你自己的要求：

Put your own claim in the GenerateUserIdentityAsync method like this:

public class ApplicationUser : IdentityUser
{
    // some code here

    public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUser> manager)
    {
        var userIdentity = await manager.CreateIdentityAsync(this, DefaultAuthenticationTypes.ApplicationCookie);
        userIdentity.AddClaim(new Claim("ProfilePicture", this.ProfilePicture));
        return userIdentity;
    }
}

然后写一个扩展方法来轻松地阅读这样的主张：

Then write a extension method to easily read the claim like this:

public static class IdentityHelper
{
    public static string GetProfilePicture(this IIdentity identity)
    {
        var claimIdent = identity as ClaimsIdentity;
        return claimIdent != null
            && claimIdent.HasClaim(c => c.Type == "ProfilePicture")
            ? claimIdent.FindFirst("ProfilePicture").Value
            : string.Empty;
    }
}

现在，你可以很容易地使用你的扩展方法是这样的：

Now you could easily use your extension method like this:

var pic = User.Identity.GetProfilePicture();

第二种方法：

如果您preFER新的数据，而不是要求兑现一个，你可以编写另一个扩展方法来从用户管理器获取属性：

If you prefer fresh data instead of cashed one in the claim, you could write another extension method to get the property from user manager:

public static class IdentityHelper
{
    public static string GetFreshProfilePicture(this IIdentity identity)
    {
        var userManager = HttpContext.Current.GetOwinContext().GetUserManager<ApplicationUserManager>();
        return userManager.FindById(identity.GetUserId()).ProfilePicture;
    }
}

现在只需使用这样的：

var pic = User.Identity.GetFreshProfilePicture();

另外，不要忘了添加相关的命名空间：

Also don't forget to add relevant namespaces:

using System.Security.Claims;
using System.Security.Principal;
using System.Web;
using Microsoft.AspNet.Identity.Owin;
using Microsoft.AspNet.Identity;

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