如何在 ASP .NET CORE Identity 中通过 SignInManager 登录后获取用户声明？

I have an ASP .NET Core 2.0 project in which I am using Microsoft's Identity framework for authentication/authorization. I have the following method that validates the user against username and password and returns claims count. The user I am trying to login is found in database but it's claims are being returned 0 here - in the database the claims do exist against the user (see the image).

    [HttpPost("login")]
    public async Task<object> Login([FromBody] LoginDto model)
    {
        var result = await _signInManager.PasswordSignInAsync(model.Email, model.Password, false, false);

        if (result.Succeeded)
        {
            var appUser = _signInManager.UserManager.Users.SingleOrDefault(r => r.Email == model.Email);
            var userClaims = await _signInManager.UserManager.GetClaimsAsync(appUser); // this is returning 0 claims

            return Ok(HttpContext.User.Claims.Count());
        }

       throw new ApplicationException("INVALID_LOGIN_ATTEMPT");
    }

关于可能重复的问题的答案并没有解决我的问题。

For UserManager.GetClaimsAsync，它将查询来自AspNetUserClaims代替AspNetUserRoles。你可以通过以下方式检查异步获取索赔 https://github.com/aspnet/Identity/blob/c7276ce2f76312ddd7fccad6e399da96b9f6fae1/src/EF/UserStore.cs#L439

return await UserClaims.Where(uc => uc.UserId.Equals(user.Id)).Select(c => c.ToClaim()).ToListAsync(cancellationToken);

一般来说，我们可以尝试HttpContext.User.Claims检索用户的声明，但它将适用于子请求而不是当前的登录请求。如果你移动这个HttpContext.User.Claims to Home Index动作，它会返回预期的结果。

为了获得索赔Login，我建议你尝试一下

                var claimsPrincipal = await _signInManager.CreateUserPrincipalAsync(appUser);
                var claims = claimsPrincipal.Claims.ToList();