System.AggregateException: \'某些服务无法在.net6 中构造错误答案

【问题标题】：System.AggregateException: 'Some services are not able to be constructed error in .net6System.AggregateException: \'某些服务无法在.net6 中构造错误
【发布时间】：2022-08-20 14:59:30
【问题描述】：

//this is UserService file   

 using System.Security.Claims;
    
    namespace _HALKA.Services
    {
        public class UserService : IUserService
        {
            private readonly IHttpContextAccessor _httpContextAccessor;
        
    
            public UserService(IHttpContextAccessor httpContextAccessor)
            {
                _httpContextAccessor = httpContextAccessor;
            }
    
            public string GetMyName()
            {
                var result = string.Empty;
                if (_httpContextAccessor.HttpContext != null)
                {
                    result = _httpContextAccessor.HttpContext.User.FindFirstValue(ClaimTypes.Name);
                }
                return result;
            }
        }
        }

//this is IUserService file
    namespace _HALKA.Services
    {
        public interface IUserService
        {
            string GetMyName();
         
        }
    }

//And this is program.cs file

builder.Services.AddScoped<IUserService, UserService>();

我从 \"var app = builder.Build();\" 收到此错误：

System.AggregateException：\'无法构造某些服务（验证服务描述符时出错\'ServiceType：_HALKA.Services.IUserService Lifetime：Scoped ImplementationType：_HALKA.Services.UserService\'：无法解析服务类型\ 'Microsoft.AspNetCore.Http.IHttpContextAccessor\' 尝试激活 \'_HALKA.Services.UserService\'。）\'

什么以及如何解决IUserService？

标签： asp.net asp.net-web-api

【解决方案1】：

在Programm.cs 文件中添加以下代码

builder.Services.AddHttpContextAccessor();

【讨论】：