asp.net mvc 5-如何在成功登录后立即在控制器中获取Identity UserID

Question

我使用Identity v2和MVC 5进行外部登录。

在我的外部登录回调函数中，我使用登录用户

var result = await SignInManager.ExternalSignInAsync(loginInfo, isPersistent: false);

那么result有一个开关，在success的情况下我需要访问用户的ID，但User.Identity.GetUserId();在这里给了我null。

在这种情况下，我如何访问用户ID？

Answer 1

要在成功登录后立即获取索赔数据和有关登录身份的其他信息，只需访问signinManager.AuthenticationManager.AuthenticationResponseGrant.Identity即可。

例如，

switch (result) { case SignInStatus.Success: var userId = signinManager.AuthenticationManager.AuthenticationResponseGrant .Identity.GetUserId(); // ...

您还可以在另一个问题的答案中看到它用于在登录后立即向身份添加新声明-AuthenticationManager.AuthenticationResponseGrant.Identity.AddClaims(freshClaims);

Answer 2

我使用System.Security.Claims.ClaimTypes.NameIdentifier对象来保持我的用户id

我创建了一个助手类来达到中的值

public class UserHelper
  {
    public static string GetUserId()
    {
      var identity = (System.Security.Claims.ClaimsPrincipal)System.Threading.Thread.CurrentPrincipal;
      var principal = System.Threading.Thread.CurrentPrincipal as System.Security.Claims.ClaimsPrincipal;
      var userId = identity.Claims.Where(c => c.Type == System.Security.Claims.ClaimTypes.NameIdentifier).Select(c => c.Value).SingleOrDefault();
      return userId;
    }
    public static string GetUserName()
    {
      var identity = (System.Security.Claims.ClaimsPrincipal)System.Threading.Thread.CurrentPrincipal;
      var principal = System.Threading.Thread.CurrentPrincipal as System.Security.Claims.ClaimsPrincipal;
      var name = identity.Claims.Where(c => c.Type == System.Security.Claims.ClaimTypes.Name).Select(c => c.Value).SingleOrDefault();
      return name;
    }
    public static string GetUserMail()
    {
      var identity = (System.Security.Claims.ClaimsPrincipal)System.Threading.Thread.CurrentPrincipal;
      var principal = System.Threading.Thread.CurrentPrincipal as System.Security.Claims.ClaimsPrincipal;
      var mail = identity.Claims.Where(c => c.Type == System.Security.Claims.ClaimTypes.Email).Select(c => c.Value).SingleOrDefault();
      return mail;
    }
  }

我称之为

var user = UserHelper.GetUserId();

Answer 3

好的，我找到了一种方式；我可以通过获得

var userID = UserManager.FindByEmail(loginInfo.Email).Id;

但是，我不认为这是最好的解决方案，因为我似乎遇到了两个查询。有人能提供更好的解决方案吗？

Answer 4

您可以使用以下代码。

向Identity.Config.cs 中的ApplicationSignInManager类添加函数

 public override Task SignInAsync(ApplicationUser user, bool isPersistent, bool rememberBrowser)
 {
            var claims = new List<Claim>()
            {
                new Claim(ClaimTypes.NameIdentifier, user.Id),
                new Claim(ClaimTypes.Email, user.Email)
            };
            this.AuthenticationManager.User.AddIdentity(new ClaimsIdentity(claims));
            return base.SignInAsync(user, isPersistent, rememberBrowser);
}

试试代码

private ClaimsPrincipal GetCurrentUser()
        {
            var context = HttpContext.GetOwinContext();
            if (context == null)
                return null;
            if (context.Authentication == null || context.Authentication.User == null)
                return null;
            return context.Authentication.User;
        }
        private string GetUserId()
        {
            var user = GetCurrentUser();
            if (user == null)
                return null;
            var claim = user.Claims.FirstOrDefault(o => o.Type == ClaimTypes.NameIdentifier);
            if (claim == null)
                return null;
            return claim.Value;
        }
        private string GetUserEmail()
        {
            var user = GetCurrentUser();
            if (user == null)
                return null;
            var claim = user.Claims.FirstOrDefault(o => o.Type == ClaimTypes.Email);
            if (claim == null)
                return null;
            return claim.Value;
        }

Answer 5

在dotnet 5中，我使用SignInManager 登录后遵循上下文

 var result =
            await _signInManager.PasswordSignInAsync(model.UserName, model.Password, true, lockoutOnFailure: true);
        if (result.Succeeded)
        {
            var userId = _signInManager.UserManager.Users.FirstOrDefault()?.Id; }