.net 6使用Autofac按程序集构造函数注入

（1）添加Autofac.Extensions.DependencyInjection引用 

（2）Program类中添加如下代码

builder.Host.UseServiceProviderFactory(new AutofacServiceProviderFactory())//Step 1：容器替换
    .ConfigureContainer(builder =>
{
    //服务层程序集命名空间
    Assembly userService = Assembly.Load("Demo.UserService");
    //自动注入
    builder.RegisterAssemblyTypes(userService)
        .Where(t => t.Name.EndsWith("Service")||t.Name.EndsWith("Repository"))
        .AsImplementedInterfaces().SingleInstance();
});

Program类所有代码：

var builder = WebApplication.CreateBuilder(args);

builder.Host.UseServiceProviderFactory(new AutofacServiceProviderFactory())//Step 1：容器替换
    .ConfigureContainer(builder =>
{
    //服务层程序集命名空间
    Assembly userService = Assembly.Load("Demo.UserService");
    //自动注入
    builder.RegisterAssemblyTypes(userService)
        .Where(t => t.Name.EndsWith("Service")||t.Name.EndsWith("Repository"))
        .AsImplementedInterfaces().SingleInstance();
});

builder.Services.AddControllers();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

var app = builder.Build();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}

app.UseHttpsRedirection();

app.UseAuthorization();

app.MapControllers();

app.Run();