该模块要求 HttpApplication 实现 IContainerProviderAccessor

Question

你好 我想在我的 asp.net mvc 应用程序中使用 Autofac，这是我在 global.asxc 文件中的代码：

 protected void Application_Start()
    {
        ....

        var builder = new ContainerBuilder();
        builder.RegisterControllers(Assembly.GetExecutingAssembly());

        IContainer container = builder.Build();

        DependencyResolver.SetResolver(new AutofacDependencyResolver(container));

    }

但是当我运行该项目时，我看到此错误：

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

怎么了 ？

Answer 1

我和OP遇到了同样的问题，但我的解决方案不同。

来自此处：

删除旧项目

• 从 Global.asax 中删除 IContainerProviderAccessor 接口。ASP.NET MVC 集成不再使用此实现。
• 删除对 AutofacControllerFactory 的引用。新的 MVC 集成改为使用 MVC DependencyResolver 类进行集成。
• 删除 ASP.NET Autofac HTTP 模块配置。 之前需要一些 Autofac ContainerDisposal 和 PropertyInjection 模块在你的 web.config 中。这些应该被删除。

Answer 2

asp.net mvc3 的 autofac 的最小 global.asax.cs 设置可能如下所示：
（RegisterRoutes 已从代码中删除）。与以前版本的 asp.net mvc 不同（来自 http://code.google.com /p/autofac/wiki/Mvc3Integration)

HttpApplication 类不再需要实现 IContainerProviderAccessor 接口，如 ASP.NET 集成文档中所述。应删除 Global.asax.cs 文件中与实现接口相关的所有代码。

您还需要对 Autofac.Integration.Mvc.dll 的引用

using System;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;
using Autofac;
using Autofac.Integration.Mvc;

namespace ApplicationX
{
    public class MvcApplication : HttpApplication
    {
        private static IContainer _container;

        /// <summary>
        /// Gets the container.
        /// </summary>
        public IContainer Container
        {
            get { return _container; }
        }

        // RegisterRoutes and RegisterGlobalFilters removed ...

        /// <summary>
        /// Fired when the first resource is requested from the web server and the web application starts
        /// </summary>
        protected void Application_Start()
        {
            // Register: create and configure the container
            _container = BootstrapContainer();

            DependencyResolver.SetResolver(new AutofacDependencyResolver(_container));

            // MVC Stuff
            AreaRegistration.RegisterAllAreas();

            RegisterGlobalFilters(GlobalFilters.Filters);
            RegisterRoutes(RouteTable.Routes);
        }

        /// <summary>
        /// Fired when the web application ends
        /// </summary>
        public void Application_End()
        {
            // Release: remember to dispose of your container when your application is about to shutdown to let it gracefully release all components and clean up after them
            _container.Dispose();
        }

        /// <summary>
        /// Bootstrapper is the place where you create and configure your container
        /// </summary>
        /// <returns>An Autofac container</returns>
        private IContainer BootstrapContainer()
        {
            var builder = new ContainerBuilder();
            // You can make property injection available to your MVC views by adding the ViewRegistrationSource to your ContainerBuilder before building the application container.
            builder.RegisterSource(new ViewRegistrationSource());
            // An example of a module that registers the dependencies for a ServiceLayer of your application
            builder.RegisterModule(new ServiceModule());
            builder.RegisterControllers(typeof(MvcApplication).Assembly);
            return builder.Build();
        }
    }
}