本模块要求HttpApplication实现IContainerProviderAccessor

Question

嗨，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));

    }

但是当我运行这个项目时，我看到了这个错误：

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

出什么问题了？

Answer 1

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

HttpApplication类不再需要实现IContainerProviderAccessor接口，如ASP.NET集成文档中所述。所有与实现接口相关的代码都应该从Global.asax.cs文件中删除。

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();
        }
    }
}

Answer 2

我和操作员有同样的问题，但我的解决方案不同。

来自here

删除旧项目

来自

• Remove的integration.
• Remove接口。此实现不再用于ASP.NET MVC integration.
• Remove对AutofacControllerFactory的引用。新的MVC集成使用MVC DependencyResolver类进行集成。以前，您的web.config中需要一些Autofac ContainerDisposal和PropertyInjection模块。这些都应该删除。