.net - 使用 Autofac 在 .NET Framework 中注册 IHttpClientFactory DI

Question

.NET 框架版本：4.7.2 Autofac 版本：4.0.1.0

我想在我的 Global.asax 中注册 IHttpClientFactory 但我不能像在 .net 核心中那样使用 services.AddHttpClient 。我需要 IHttpClientFactory 作为我自己的 http 客户端类的依赖项，我需要在我的 webapi 项目中引用它。

这甚至可能吗？如果是，它是如何完成的？

Answer 1

.Net Framework 中提供了所需的组件

创建服务集合，调用添加 http 客户端扩展并使用 autofac 集成Autofac.Extensions.DependencyInjection来填充您的容器并获取提供程序

以下 .Net Framework 单元测试用于演示上述内容

using System;
using System.Net.Http;
using Autofac;
using Autofac.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection;

[TestClass]
public class HttpClientFactoryTest {
    [TestMethod]
    public void Should_Create_HttpClientFactory() {
        var services = new ServiceCollection(); //Create a service collection
        services.AddHttpClient(); //invoke add http client extension

        //...add other services as needed

        //use autofac integration `Autofac.Extensions.DependencyInjection` 
        var providerFactory = new AutofacServiceProviderFactory();
        //to populate your container
        ContainerBuilder builder = providerFactory.CreateBuilder(services);

        //...configure builder as needed

        //and get a service provider
        IServiceProvider serviceProvider = providerFactory.CreateServiceProvider(builder);

        IHttpClientFactory factory = serviceProvider.GetRequiredService<IHttpClientFactory>();

        //OR Container
        ContainerBuilder builder2 = providerFactory.CreateBuilder(services);

        //...configure builder as needed

        IContainer container = builder2.Build();

        IHttpClientFactory factory2 = container.Resolve<IHttpClientFactory>();
    }
}

并在您的 Global.asax 中轻松复制