C# 无法访问已释放的对象服务提供程序

我有一个类似这样的中介类，其中我使用一组服务初始化一个字典：

public class Mediator : IMediator
    {
        static readonly ConcurrentDictionary<int, Func<IGameBaseService>> services = new ConcurrentDictionary<int, Func<IGameBaseService>>();
        protected readonly IServiceProvider _serviceProvider;

        public Mediator(IServiceProvider serviceProvider)
        {
            _serviceProvider = serviceProvider;
        }
        public async Task<Func<IGameBaseService>> GetGameServiceAsync(int gameId)
        {
            if (services.Count == 0)
                await AddServices();
            return await Task.FromResult(services[gameId]);
        }

        private async Task AddServices()
        {
            await Task.FromResult(services.GetOrAdd((int)Game.Blackjack, () => new LotteryService(_serviceProvider)));
        }

---

问题是，您的中介是作用域服务（意味着为每个请求创建一个新的，然后释放），因为它得到的IServiceProvider实例在该作用域中也是有效的，但您将其保存在LotteryService中，并在已经释放后尝试使用它

我可以提出一些你可以考虑的方法，选择最适合你的方法。

使中介成为单例服务

不要缓存LotteryService，也不要使其成为作用域服务

我不知道为什么LotteryService需要IServiceProvider，但也许您可以在方法调用时传递它的依赖关系

---

您可以尝试注入

IServiceScope

并调用

\u serviceScope.ServiceProvider.GetService

。完成后，请不要忘记使用

\u serviceScope.dispose（）

处理它。@N.Dogac现在它没有运行。说不能注射IServiceScope

public async Task<ResponseBase> GetStateAsync(ApiGetStateInput input)
{
    var gameService = await _mediator.GetGameServiceAsync(input.Identity.GameId);
    var state = gameService().GetStateAsync(input.Identity.GameTableId);
    response.ResponseObject = state.Dump();
}

public class LotteryService : BaseService, IGameBaseService
    {
       public LotteryService (IServiceProvider serviceProvider) : base(serviceProvider)
        {
            
        }
    }
public Task<IEnumerable<BlGameState>> GetStateAsync(int tableId)
        {
            //logic
            return something;
        }

 public class BaseService : IBaseService
    {
        protected readonly IServiceProvider _serviceProvider;
        protected readonly IUnitOfWork _unitOfWork;
        protected readonly ICacheProvider _cache;
        protected readonly IMapper _mapper;

        public BaseService(IServiceProvider serviceProvider)
        {
            _serviceProvider = serviceProvider;
            _mapper = _serviceProvider.GetService<IMapper>();
            _unitOfWork = _serviceProvider.GetService<IUnitOfWork>();
            _cache = _serviceProvider.GetService<ICacheProvider>();
        }
}

            services.AddAutoMapper(typeof(Startup));
            
            services.AddScoped<IUnitOfWork, UnitOfWork>();
            services.AddScoped<ICacheProvider, CacheProvider>();
            services.AddScoped<IMediator, Mediator>();

Cannot access a disposed object.\r\nObject name: 'IServiceProvider'._   at Microsoft.Extensions.DependencyInjection.ServiceLookup.ThrowHelper.ThrowObjectDisposedException()\r\n   at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.GetService(Type serviceType)\r\n   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetService[T](IServiceProvider provider)\r\n