.NET 6 API System.InvalidOperationException

Question

我在一个 class 上有这样的 Autofac 模块；

  public class AutofacBusinessModule:Module
  {
    protected override void Load(ContainerBuilder builder)
    {
      builder.RegisterType<ProductManager>().As<IProductService>();
      builder.RegisterType<EfProductDal>().As<IProductDal>();

      builder.RegisterType<CategoryManager>().As<ICategoryService>();
      builder.RegisterType<EfCategoryDal>().As<ICategoryDal>();

      builder.RegisterType<CustomerManager>().As<ICustomerService>();
      builder.RegisterType<EfCustomerDal>().As<ICustomerDal>();

      builder.RegisterType<RegionManager>().As<IRegionService>();
      builder.RegisterType<EfRegionDal>().As<IRegionDal>();

      builder.RegisterType<TerritoryManager>().As<ITerritoryService>();
      builder.RegisterType<EfTerritoryDal>().As<ITerritoryDal>();

      builder.RegisterType<ShipperManager>().As<IShipperService>();
      builder.RegisterType<EfShipperDal>().As<IShipperDal>();

      builder.RegisterType<EmployeeManager>().As<IEmployeeDal>();
      builder.RegisterType<EfEmployeeDal>().As<IEmployeeDal>();



      var assembly = System.Reflection.Assembly.GetExecutingAssembly();
      builder.RegisterAssemblyTypes(assembly).AsImplementedInterfaces()
        .EnableInterfaceInterceptors(new ProxyGenerationOptions()
        {
          Selector = new AspectInterceptorSelector()
        }).SingleInstance();
    }

我的 api 代码在那里；

  [Route("api/[controller]")]
  [ApiController]
  public class ProductsController : Controller
  {

    private readonly IProductService _productService;
    public ProductsController(IProductService productService)
    {
      _productService = productService;
    }

    [HttpGet("getall")]
    public IActionResult GetAllProducts()
    {
      var result = _productService.GetAll();
      if (result.Success)
      {
        return Ok(result);
      }

      return BadRequest(result);
    }
  }
}

我在 program.cs 上添加了这个但没有用，如果较低我使用 .net 6 我这样修复它但我不知道如何修复 .net 6 因为启动不再存在。

IHostBuilder CreateHostBuilder(string[] args) =>
  Host.CreateDefaultBuilder(args)
    .UseServiceProviderFactory(new AutofacServiceProviderFactory())
    .ConfigureContainer<ContainerBuilder>(builder =>
    {
      builder.RegisterModule(new AutofacBusinessModule());
    });

我怎样才能解决这个问题？

它给了我那个错误

System.InvalidOperationException：在尝试激活“TAO.WebApi.Controllers.ProductsController”时无法解析类型“TAO.Business.Abstract.IProductService”的服务。 在 Microsoft.Extensions.DependencyInjection.ActivatorUtilities.GetService(IServiceProvider sp, Type type, Type requiredBy, Boolean isDefaultParameterRequired) 在 lambda_method3(Closure, IServiceProvider, Object[] ) 在 Microsoft.AspNetCore.Mvc.Controllers.ControllerActivatorProvider.<>c__DisplayClass7_0.b__0 (ControllerContext controllerContext) 在 Microsoft.AspNetCore.Mvc.Controllers.ControllerFactoryProvider.<>c__DisplayClass6_0.g__CreateController|0(ControllerContext controllerContext) 在 Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state is ) 在 Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeInnerFilterAsync() --- 上一个位置的堆栈跟踪结束 --- 在 Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|20_0（ResourceInvoker 调用程序，任务 lastTask，State接下来，Scope scope，Object state，88116134347 688 已完成）在 Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|17_0（ResourceInvoker 调用程序、任务任务、IDisposable 范围）在 Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|17_0（ResourceInvoker 调用程序、任务任务、IDisposable 范围) 在 Microsoft.AspNetCore.Routing.EndpointMiddleware.g__AwaitRequestTask|6_0（终结点端点、任务请求任务、ILogger 记录器） 在 Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke（HttpContext 上下文） ) 在 Swashbuckle.AspNetCore.Swagger.SwaggerMiddleware.Invoke(HttpContext httpContext, ISwaggerProvider swaggerProvider) 在 Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext 上下文)

HEADERS
=======
Accept: */*
Connection: keep-alive
Host: localhost:7019
User-Agent: PostmanRuntime/7.30.0
Accept-Encoding: gzip, deflate, br
Postman-Token: fbff062e-ca49-4f37-afc5-e8785afbd43c

Answer 1

从迁移文档中尝试以下代码：

builder.Host.UseServiceProviderFactory(new AutofacServiceProviderFactory());

// Register services directly with Autofac here. Don't
// call builder.Populate(), that happens in AutofacServiceProviderFactory.
builder.Host.ConfigureContainer<ContainerBuilder>(builder => builder.RegisterModule(new AutofacBusinessModule()));

请注意，“旧”通用主机 model 仍然适用于 .NET 6，没有要求使用新的最小主机 model（但您不仅需要复制CreateHostBuilder方法，还需要将旧Program.Main的内容复制到新Program中 top-级语句文件）。