Program.cs

using System;using System.Collections.Generic;using System.Linq;using System.Threading.Tasks;using Autofac.Extensions.DependencyInjection;using Microsoft.AspNetCore.Hosting;using Microsoft.Extensions.Configuration;using Microsoft.Extensions.Hosting;using Microsoft.Extensions.Logging;namespace Baiqian.Web.Razor{    public class Program    {        public static void Main(string[] args)        {            CreateHostBuilder(args).Build().Run();        }        public static IHostBuilder CreateHostBuilder(string[] args) =>            Host.CreateDefaultBuilder(args)                .UseServiceProviderFactory(new AutofacServiceProviderFactory())    // 添加这句                .ConfigureWebHostDefaults(webBuilder =>                {                    webBuilder.UseStartup
     
      ();                });    }}
     

　　

Startup.cs

public void ConfigureContainer(ContainerBuilder builder)        {            builder.RegisterType
     
      ().As
      
       ().InstancePerLifetimeScope();        }
      
     

　

Startup.cs 只需要添加这个方法即可。