Onion Architecture中的Autofac WebForms-Java 学习之路

我正在关注洋葱架构，其Bootstrapper部件是用 Autofac 构建的 .

架构如下：

核心
DependencyInjection（Autofac在这里）
服务
演讲（MVC 5）
测试

我需要一些WebForm.aspx页面来显示我的报告 . 所以我按照WebForms与Autofac集成链接的说明进行操作：http://docs.autofac.org/en/latest/integration/webforms.html

以下是DependencyInjection的代码：

[assembly: WebActivatorEx.PreApplicationStartMethod(typeof(IocConfig), "RegisterDependencies")]
namespace DependencyInjection.App_Start
{
    public class IocConfig : IContainerProviderAccessor
    {
         // Provider that holds the application container.
        static IContainerProvider _containerProvider;

        // Instance property that will be used by Autofac HttpModules
        // to resolve and inject dependencies.
        public IContainerProvider ContainerProvider
        {
            get { return _containerProvider; }
        }

        public static void RegisterDependencies()
        {
            // Build up your application container and register your dependencies.
            var builder = new ContainerBuilder();

            // Register your MVC controllers. (MvcApplication is the name of
            // the class in Global.asax.)
            builder.RegisterControllers(typeof(MvcApplication).Assembly);

            // OPTIONAL: Register model binders that require DI.
            builder.RegisterModelBinders(typeof(MvcApplication).Assembly);
            builder.RegisterModelBinderProvider();

            // OPTIONAL: Register web abstractions like HttpContextBase.
            builder.RegisterModule<AutofacWebTypesModule>();

            // OPTIONAL: Enable property injection in view pages.
            builder.RegisterSource(new ViewRegistrationSource());



            // OPTIONAL: Enable property injection into action filters.
            builder.RegisterFilterProvider();

 builder.RegisterType<MyService().As<IMyService().InstancePerRequest();

            // Once you're done registering things, set the container
           // provider up with your registrations.
           _containerProvider = new ContainerProvider(container);
        }
    }
}

在DependencyInjection的App.Config中，我添加了：

<system.web>
    <httpModules>      
      <add name="ContainerDisposal" type="Autofac.Integration.Web.ContainerDisposalModule, Autofac.Integration.Web"/>
      <add name="PropertyInjection" type="Autofac.Integration.Web.Forms.PropertyInjectionModule, Autofac.Integration.Web"/>
    </httpModules>
  </system.web>
  <system.webServer>
    <modules>
      <add name="ContainerDisposal" type="Autofac.Integration.Web.ContainerDisposalModule, Autofac.Integration.Web" preCondition="managedHandler"/>
      <add name="PropertyInjection" type="Autofac.Integration.Web.Forms.PropertyInjectionModule, Autofac.Integration.Web" preCondition="managedHandler"/>
    </modules>    
  </system.webServer>

它仍然没有用 . MyService仍然是 null . 当我将App.Config设置添加到我的演示文稿的Web.Config时，我收到以下错误：

此模块要求HttpApplication（全局应用程序类）实现IContainerProviderAccessor

1 回答

Autofac ASP.net WebForm集成要求 HttpApplication 实现 IContainerProviderAccessor .

如果要将 WebActivator 与 IocConfig 类一起使用 . Global.asax类仍然必须实现 IContainerProviderAccessor 接口以让HttpModule找到Autofac容器 .

您可以依靠 IocConfig 实现来实现此接口

Global.asax.cs

public class Global : HttpApplication, IContainerProviderAccessor
{
  // Instance property that will be used by Autofac HttpModules
  // to resolve and inject dependencies.
  public IContainerProvider ContainerProvider
  {
    get { return IocConfig.ContainerProvider; }
  }
}

并且您的 IocConfig 不需要实现 IContainerProviderAccessor 但需要为 IContainerProvider 设置公共静态属性

[assembly: WebActivatorEx.PreApplicationStartMethod(typeof(IocConfig), 
                                                   "RegisterDependencies")]

namespace DependencyInjection.App_Start
{
    public class IocConfig : IContainerProviderAccessor
    {
         // Provider that holds the application container.
        static IContainerProvider _containerProvider;

        // Instance property that will be used by Autofac HttpModules
        // to resolve and inject dependencies.
        public static IContainerProvider ContainerProvider
        {
            get { return _containerProvider; }
        }

回复于 2024-05-02T09:56:43+08:00

Onion Architecture中的Autofac WebForms

1 回答

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