ASP.NET Core 3.1“用户”不包含“ FindFirstValue”的定义。 [英] ASP.NET Core 3.1 "'User' does not contain a definition for 'FindFirstValue'"
问题描述
尝试从此处实施答案时> 如何在ASP.NET Core中获取当前登录的用户ID
,然后用户将我重定向到此处> > https://github.com/dotnet/aspnetcore/issues/18348
While trying to implement the answer from here > How to get the current logged in user Id in ASP.NET Core and the user redirected me to here > https://github.com/dotnet/aspnetcore/issues/18348
var UserId = User.FindFirstValue(ClaimTypes.Name);
^工作,并显示以下错误用户不包含 FindFirstValue的定义
^ This is not working, and prints the following error 'User' does not contain a definition for 'FindFirstValue'
编辑:添加控制器代码段
我的控制器的完整代码段...
The full snippet of my controller...
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;
using ProjectName.Processing;
using ProjectName.Repository;
using Newtonsoft.Json;
namespace ProjectName.Controllers
{
[ApiController]
[Route("api/[controller]/[action]")]
public class ClassNameController : ControllerBase
{
private readonly ILogger<ClassNameController> _logger;
private OtherClassNameProcessing proc = new OtherClassNameProcessing();
public ClassNameController(ILogger<ClassNameController> logger)
{
_logger = logger;
}
[HttpGet]
[ProducesResponseType(typeof(List<2ndOtherClassNameRepository>), StatusCodes.Status200OK)]
public IActionResult GetUserName()
{
var data = proc.GetUserName();
return Ok(data.Result);
}
}
}
我的控制器的完整代码段是调用...
The full snippet my controller is calling...
using Microsoft.EntityFrameworkCore;
using ProjectName.Data;
using ProjectName.Repo;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
//using System.Web;
using System.Threading.Tasks;
using System.Security.Claims;
using Microsoft.AspNetCore.Http;
using System.Web.Providers.Entities;
namespace ProjectName.Processing
{
public class OtherClassNameProcessing
{
private readonly ProjName_DevelContext _context = new ProjName_DevelContext();
private async Task<List<2ndOtherClassNameRepository>> GetNameFromRepo()
{
List<2ndOtherClassNameRepository> repoList = new List<2ndOtherClassNameRepository>();
var Temp = await _context.tablename.ToListAsync();
/* Working Test
2ndOtherClassNameRepository repo = new 2ndOtherClassNameRepository();
repo.UserName = "JohnDoe";
repoList.Add(repo);
return repoList;
*/
2ndOtherClassNameRepository repo = new 2ndOtherClassNameRepository();
// repo.UserName = "JohnDoe";
var userId = User.FindFirstValue(ClaimTypes.Name);
repo.UserName = userId;
repoList.Add(repo);
return repoList;
}
internal async Task<List<2ndOtherClassNameRepository>> GetUserName()
{
return await GetNameFromRepo();
}
}
}
任何人知道我为什么
推荐答案
好!遇到问题了。 User
ClaimPrinciple
仅在 Controller
上下文中可用。我看到您的 ControllerNameProcessing
不是 Controller
类。因此,您应该执行以下操作:
Okay! Got the problem. User
ClaimPrinciple
is only available in the Controller
context. I see your ControllerNameProcessing
is not a Controller
class. So you should do as follows:
public class ControllerNameProcessing
{
private readonly IHttpContextAccessor _httpContextAccessor;
public ControllerNameProcessing(IHttpContextAccessor httpContextAccessor)
{
_httpContextAccessor = httpContextAccessor;
}
private async Task<List<2ndClassNameRepository>> GetNameFromRepo()
{
// Omitted your other codes for brevity
var userName = _httpContextAccessor.HttpContext.User.FindFirstValue(ClaimTypes.Name);
// Omitted your other codes for brevity
}
}
然后,应在 Startup
类中注册 IHttpContextAccessor
,如下所示:
Then you should register IHttpContextAccessor
in the Startup
class as follows:
public void ConfigureServices(IServiceCollection services)
{
services.AddHttpContextAccessor();
}
现在在您的控制器中:
[ApiController]
[Route("api/[controller]/[action]")]
public class ClassNameController : ControllerBase
{
private readonly ILogger<ClassNameController> _logger;
private OtherClassNameProcessing _otherClassNameProcessing;
public ClassNameController(ILogger<ClassNameController> logger, OtherClassNameProcessing otherClassNameProcessing)
{
_logger = logger;
_otherClassNameProcessing = otherClassNameProcessing;
}
[HttpGet]
[ProducesResponseType(typeof(List<2ndOtherClassNameRepository>), StatusCodes.Status200OK)]
public IActionResult GetUserName()
{
var data = proc.GetUserName();
return Ok(data.Result);
}
}
然后您应该注册 OtherClassNameProcessing
在 Startup
类中,如下所示:
Then you should register OtherClassNameProcessing
in the Startup
class as follows:
public void ConfigureServices(IServiceCollection services)
{
services.AddHttpContextAccessor();
services.AddScoped<OtherClassNameProcessing>();
}
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