每个请求的ASP.NET 5(VNext)Autofac实例

假设你有以下课程注册：

public class Foo : IDisposable 
{
    public Foo()
    {
        Console.WriteLine("created");
    }

    public void Dispose()
    {
        Console.WriteLine("disposed");
    }
}

注册IServiceCollection

您可以将实例注册为IServiceCollection的作用域,并基于此构建Autofac容器.

public IServiceProvider ConfigureServices(IServiceCollection services)
        {
            services.AddMvc();
            services.AddScoped<Foo,Foo>();

#if DNX451
            // Create the autofac container
            var builder = new ContainerBuilder();

            // Create the container and use the default application services as a fallback
            AutofacRegistration.Populate(builder,services);
            var container = builder.Build();

            return container.Resolve<IServiceProvider>();
#endif

            return services.BuildServiceProvider();
        }

在Autofac Builder上注册

您可以在Autofac构建器上将该类型注册为每个生命周期范围的实例,这将为您提供每个请求生存期的实例：

public IServiceProvider ConfigureServices(IServiceCollection services)
        {
            services.AddMvc();
#if DNX451

            // Create the autofac container
            var builder = new ContainerBuilder();

            // Create the container and use the default application services as a fallback
            AutofacRegistration.Populate(builder,services);
            builder.RegisterType<Foo>().As<Foo>().InstancePerLifetimeScope();
            var container = builder.Build();

            return container.Resolve<IServiceProvider>();
#endif

            return services.BuildServiceProvider();
        }

如上所述,两者的结果相同：

有关ASP.NET 5：Middlewares and Per Request Dependency Injection上每个请求实例的详细信息