添加自定义声明不适用于asp.net核心身份

Question

I have created CustomClaimType to store user id :

public static class CustomClaimTypes
{
    public const string UserId = "UserId";
}

When user login, I set it:

var claims = new List<Claim>();
claims.Add(new Claim(ClaimTypes.Name, doc_session.ufname + " " + doc_session.ulname));
claims.Add(new Claim(CustomClaimTypes.UserId, doc_session.isci_id.Value.ToString()));
ClaimsIdentity userIdentity = new ClaimsIdentity(claims,"Identity.Application");
ClaimsPrincipal principal = new ClaimsPrincipal(userIdentity);

I have also created custom identity extension:

public static class IdentityExtensions
{
    public static int GetUserId(this IIdentity identity)
    {
        ClaimsIdentity claimsIdentity = identity as ClaimsIdentity;
        Claim claim = claimsIdentity?.FindFirst(CustomClaimTypes.UserId);

        if (claim == null)
            return 0;

        return int.Parse(claim.Value);
    }

    public static string GetName(this IIdentity identity)
    {
        ClaimsIdentity claimsIdentity = identity as ClaimsIdentity;
        Claim claim = claimsIdentity?.FindFirst(ClaimTypes.Name);

        return claim?.Value ?? string.Empty;
    }
}

But when I call User.Identity.GetUserId(); I get 0 (null) as result.

Answer 1

For adding extra claims to Identity, you could implement custom CustomClaimsPrincipalFactory .

1. CustomClaimsPrincipalFactory

    public class CustomClaimsPrincipalFactory : UserClaimsPrincipalFactory<IdentityUser<int>> { public CustomClaimsPrincipalFactory(UserManager<IdentityUser<int>> userManager, IOptions<IdentityOptions> optionsAccessor) : base(userManager, optionsAccessor) { } public async override Task<ClaimsPrincipal> CreateAsync(IdentityUser<int> user) { var principal = await base.CreateAsync(user); // Add your claims here ((ClaimsIdentity)principal.Identity).AddClaims( new[] { new Claim(ClaimTypes.Name, user.UserName), new Claim(CustomClaimTypes.UserId, user.Id.ToString()) }); return principal; } } 

2. Register CustomClaimsPrincipalFactory

    public void ConfigureServices(IServiceCollection services) { services.Configure<CookiePolicyOptions>(options => { // This lambda determines whether user consent for non-essential cookies is needed for a given request. options.CheckConsentNeeded = context => true; options.MinimumSameSitePolicy = SameSiteMode.None; }); services.AddDbContext<ApplicationDbContext>(options => options.UseSqlServer( Configuration.GetConnectionString("DefaultConnection"))); services.AddDefaultIdentity<IdentityUser<int>>() .AddEntityFrameworkStores<ApplicationDbContext>(); services.AddScoped<IUserClaimsPrincipalFactory<IdentityUser<int>>, CustomClaimsPrincipalFactory>(); services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1); } 

3. IdentityExtensions

    public static class IdentityExtensions { public static int GetUserId(this ClaimsPrincipal identity) { Claim claim = identity?.FindFirst(CustomClaimTypes.UserId); if (claim == null) return 0; return int.Parse(claim.Value); } public static string GetName(this ClaimsPrincipal identity) { Claim claim = identity?.FindFirst(ClaimTypes.Name); return claim?.Value ?? string.Empty; } } 

4. Useage

    public IActionResult About() { var claims = User.Claims; var userId = User.GetUserId(); var userName = User.GetName(); ViewData["Message"] = "Your application description page."; return View(); }