无法在.NET Core 2.0中配置Autofac

Question

我开始使用我的第一个.NET CORE 2.0项目,它将是一个webapi.到目前为止一直很好,直到我遇到试图配置Autofac的问题.我按照这里描述的说明操作.但不幸的是,我的StartUp中出现了构建错误.显然ContainerBuilder不包含定义Populate().也AutofacServiceProvider找不到类型.我在网上搜索了一段时间,试图找到2.0的正确文档.如果源的目标是1.0或2.0,它是分散的并且并不总是很清楚.不幸的是,所有选项最终都会出现构建错误,所以我认为我会坚持使用官方文档提供的实现.是否有可能Autofac不支持.NET Core 2.0中的这种启动形式.

供参考:

using Autofac;
using System;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;

namespace TEST.API
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        public IServiceProvider ConfigureServices(IServiceCollection services)
        {
            services.AddMvc();

            var containerBuilder = new ContainerBuilder();
            containerBuilder.RegisterModule<ServiceModule>();
            containerBuilder.Populate(services);
            var container = containerBuilder.Build();
            return new AutofacServiceProvider(container);
        }

        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.UseMvc();
        }
    }
}


<Project Sdk="Microsoft.NET.Sdk.Web">
  <PropertyGroup>
    <TargetFramework>netcoreapp2.0</TargetFramework>
  </PropertyGroup>
  <ItemGroup>
    <Folder Include="wwwroot\" />
  </ItemGroup>
  <ItemGroup>
    <ProjectReference Include="..\Model\Recipy.Model.csproj" />
    <ProjectReference Include="..\Service\Recipy.Service.csproj" />  
  </ItemGroup>
  <ItemGroup>
    <PackageReference Include="Autofac" Version="4.6.2" />
    <PackageReference Include="Autofac.Extensions.DependencyInjection" Version="4.2.0" />
    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.0" />
  </ItemGroup>
  <ItemGroup>
    <DotNetCliToolReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Tools" Version="2.0.0" />
  </ItemGroup>
</Project>

Answer 1

相当简单的解决方案,Populate方法和Aut​​ofacServiceProvider都在你目前不使用的命名空间中.

你还需要"Autofac.Extensions.DependencyInjection"

然后这两个问题应该解决