c# - ASP.Net MVC : How to read my custom claims value

请参见下面的代码。我知道，通过这种方式我们可以将自定义数据添加到 claim 中，但是现在的问题是如何读回这些值。假设我想回读索偿电子邮件和Email2的值，请告诉我要回读索偿电子邮件和Email2 的值需要写什么代码。

UserManager<applicationuser> userManager = new UserManager<applicationuser>(new UserStore<applicationuser>(new SecurityContext()));
ClaimsIdentity identity = userManager.CreateIdentity(user, DefaultAuthenticationTypes.ApplicationCookie
var user = userManager.Find(userName, password);
identity.AddClaim(new Claim("Email", user.Email));
identity.AddClaim(new Claim("Email2", user.Email));

最佳答案

您可以对FindFirst(string type)使用ClaimsIdentity方法来根据声明类型检索声明。在这种情况下，Email或Email2

var claimType = "Email";
var claim = identity.FindFirst(claimType);
var email = claim == null ? string.Empty : claim.Value;

我通常将 claim 类型存储在常量中

public static partial class Constants {
    public class Security {
        public static class ClaimTypes {
            public const string Email = "http://schemas.mycompany.com/identity/claims/email";
            public const string Email2 = "http://schemas.mycompany.com/identity/claims/email2";
        }
    }
}

然后创建扩展方法以从IIdentity实现中提取它们，前提是它是从ClaimsIdentity派生的。

public static class GenericIdentityExtensions {
    /// <summary>
    /// Return the Email claim
    /// </summary>
    public static string GetEmail(this IIdentity identity) {
        if (identity != null && identity.IsAuthenticated) {
            ClaimsIdentity claimsIdentity = identity as ClaimsIdentity;
            if (claimsIdentity != null)
                return claimsIdentity.FindFirstOrEmpty(Constants.Security.ClaimTypes.Email);
        }
        return string.Empty;
    }
    /// <summary>
    /// Return the Email2 claim
    /// </summary>
    public static string GetEmail2(this IIdentity identity) {
        if (identity != null && identity.IsAuthenticated) {
            ClaimsIdentity claimsIdentity = identity as ClaimsIdentity;
            if (claimsIdentity != null)
                return claimsIdentity.FindFirstOrEmpty(Constants.Security.ClaimTypes.Email2);
        }
        return string.Empty;
    }
    /// <summary>
    /// Retrieves the first claim that is matched by the specified type if it exists, String.Empty otherwise.
    /// </summary>
    internal static string FindFirstOrEmpty(this ClaimsIdentity identity, string claimType) {
        var claim = identity.FindFirst(claimType);
        return claim == null ? string.Empty : claim.Value;
    }
}

关于c# - ASP.Net MVC : How to read my custom claims value，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/39626368/