User.IsInRole 在 ASP.NET Core 中不返回任何内容（实现了存储库模式）

我有一个具有以下配置的 ASP.NET Core（完整 .NET Framework）应用程序：

启动.cs

public void ConfigureServices(IServiceCollection services)
{
    // Add framework services.
    services.AddDbContext<ApplicationDbContext>(options =>
        options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));

    services.AddIdentity<ApplicationUser, IdentityRole>(p => {
        p.Password.RequireDigit = true;
        p.Password.RequireNonAlphanumeric = false;
        p.Password.RequireUppercase = true;
        p.Password.RequiredLength = 5;
    })
    .AddEntityFrameworkStores<ApplicationDbContext>()
    .AddDefaultTokenProviders();

    services.AddMvc();

    // Add application services.
    services.AddTransient<IEmailSender, AuthMessageSender>();
    services.AddTransient<ISmsSender, AuthMessageSender>();
    services.AddTransient<IDbFactory, DbFactory>();
    services.AddTransient<IUnitOfWork, UnitOfWork>();

    services.AddTransient<IUserRepository, UserRepository>();
    services.AddTransient<IUserService, UserService>();
}

ApplicationUser 扩展自 IdentityUser，ApplicationDbContext 扩展了 IdentityDbContext

public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    public ApplicationDbContext()
        : base()
    {
    }

    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
        : base(options)
    {
    }

    public virtual void Commit()
    {
        base.SaveChanges();
    }

    protected override void OnConfiguring(DbContextOptionsBuilder builder)
    {
        base.OnConfiguring(builder);

        builder.UseSqlServer("connection string here");
    }

    protected override void OnModelCreating(ModelBuilder builder)
    {
        base.OnModelCreating(builder);

        // Customize the ASP.NET Identity model and override the defaults if needed.
        // For example, you can rename the ASP.NET Identity table names and more.
        // Add your customizations after calling base.OnModelCreating(builder);

        // Configure model
        // Identity
        new Configuration.Identity.ApplicationUserConfiguration(builder.Entity<ApplicationUser>());
        new Configuration.Identity.ApplicationUserProfileConfiguration(builder.Entity<ApplicationUserProfile>());
        new Configuration.Identity.RoleConfiguration(builder.Entity<IdentityRole>());
        new Configuration.Identity.RoleClaimConfiguration(builder.Entity<IdentityRoleClaim<string>>());
        new Configuration.Identity.ApplicationUserRoleConfiguration(builder.Entity<IdentityUserRole<string>>());
        new Configuration.Identity.ApplicationUserClaimConfiguration(builder.Entity<IdentityUserClaim<string>>());
        new Configuration.Identity.ApplicationUserLoginConfiguration(builder.Entity<IdentityUserLogin<string>>());
        new Configuration.Identity.ApplicationUserTokenConfiguration(builder.Entity<IdentityUserToken<string>>());
    }
}

这是我的演示数据：

角色表

用户表

用户角色表

在我的登录操作中，我有以下内容：

[HttpPost]
[AllowAnonymous]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Login(LoginViewModel model, string returnUrl = null)
{
    ViewData["ReturnUrl"] = returnUrl;
    if (ModelState.IsValid)
    {
        // This doesn't count login failures towards account lockout
        // To enable password failures to trigger account lockout, set lockoutOnFailure: true
        var result = await _signInManager.PasswordSignInAsync(model.Username, model.Password, model.RememberMe, lockoutOnFailure: false);
        if (result.Succeeded)
        {
            if (User.IsInRole("Admin"))
            {
                return RedirectToAction("Index", "Home", new { area = "Admin" });
            }
            return RedirectToAction("Index", "Home");
        }
        if (result.RequiresTwoFactor)
        {
            return RedirectToAction(nameof(SendCode), new { ReturnUrl = returnUrl, RememberMe = model.RememberMe });
        }
        if (result.IsLockedOut)
        {
            _logger.LogWarning(2, "User account locked out.");
            return View("Lockout");
        }
        else
        {
            ModelState.AddModelError(string.Empty, "Invalid login attempt.");
            return View(model);
        }
    }

    // If we got this far, something failed, redisplay form
    return View(model);
}

我想要实现的是将用户登录后重定向到某个区域。

我目前面临的问题是该功能User.IsInRole("Admin")返回 false 并且在调试模式下，如果我查看用户管理器，当前用户没有加载角色（计数 = 0）。

任何想法将不胜感激。

Update 1

忽略角色 ID 原因是错误的。事实上，用户被映射了正确的值。

User.IsInRole正在检查cookie。但是您在登录时在同一个 http 请求中检查这一点。 Cookie 根本不存在 - 它将在回复或下一个请求时可用。

这时你需要使用ApplicationUserManager.IsInRoleAsync(TKey userId, string role)检查数据库。