c# - ASP.NET Core Identity - 获取当前用户

Question

要在 MVC5 中获取当前登录的用户，我们所要做的就是:

using Microsoft.AspNet.Identity;
[Authorize]
public IHttpActionResult DoSomething() {
    string currentUserId = User.Identity.GetUserId();
}

现在，对于 ASP.NET Core，我认为这应该可行，但它会引发错误。

using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Http;

private readonly UserManager<ApplicationUser> _userManager;
[HttpPost]
[Authorize]
public async Task<IActionResult> StartSession() {
    var curUser = await _userManager.GetUserAsync(HttpContext.User);
}

有什么想法吗？

编辑: Gerardo 的响应是正确的，但要获取用户的实际“Id”，这似乎可行:

ClaimsPrincipal currentUser = this.User;
var currentUserID = currentUser.FindFirst(ClaimTypes.NameIdentifier).Value;

Answer 1

如果您的代码在 MVC Controller 中:

public class MyController : Microsoft.AspNetCore.Mvc.Controller

从Controller 基类，您可以从User 属性中获取ClaimsPrincipal

System.Security.Claims.ClaimsPrincipal currentUser = this.User;

您可以直接检查声明(无需往返数据库):

bool isAdmin = currentUser.IsInRole("Admin");
var id = _userManager.GetUserId(User); // Get user id:

其他字段可以从数据库的用户实体中获取:

1. 使用依赖注入(inject)获取用户管理器

   private UserManager<ApplicationUser> _userManager;
   
   //class constructor
   public MyController(UserManager<ApplicationUser> userManager)
   {
       _userManager = userManager;
   }
   

2. 并使用它:

   var user = await _userManager.GetUserAsync(User);
   var email = user.Email;
   

如果您的代码是一个服务类，您可以使用依赖注入(inject)来获取一个IHttpContextAccessor，它可以让您从 HttpContext 获取User .

    private IHttpContextAccessor _httpContextAccessor;

    public MyClass(IHttpContextAccessor httpContextAccessor)
    {
        _httpContextAccessor = httpContextAccessor;
    }

    private void DoSomething()
    {
        var user = _httpContextAccessor.Context?.User;
    }