在Asp.net 4.0 中动态注册HttpModule

using System;
using System.Web;
using Microsoft.Web.Infrastructure;

namespace MvcApplication1
{
    public class CustomModule : IHttpModule
    {
        public void Init(HttpApplication context)
        {
            context.BeginRequest += new EventHandler(context_BeginRequest);
        }

        void context_BeginRequest(object sender, EventArgs e)
        {
            HttpApplication ap = sender as HttpApplication;
            if (ap != null)
            {
                ap.Response.Write("汤姆大叔测试PreApplicationStartMethod通过！<br/>");
            }
        }

        public void Dispose()
        {
            //nothing to do here
        }
    }

    public class PreApplicationStartCode
    {
        private static bool hasLoaded;

        public static void PreStart()
        {
            if (!hasLoaded)
            {
                hasLoaded = true;
                //注意这里的动态注册，此静态方法在Microsoft.Web.Infrastructure.DynamicModuleHelper
                Microsoft.Web.Infrastructure.DynamicModuleHelper.DynamicModuleUtility.RegisterModule(typeof(CustomModule));
            }
        }
    }
}

using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;

// General Information about an assembly is controlled through the following
// set of attributes. Change these attribute values to modify the information
// associated with an assembly.
[assembly: AssemblyTitle("MvcApplication1")]
[assembly: AssemblyDescription("")]
[assembly: AssemblyConfiguration("")]
[assembly: AssemblyCompany("")]
[assembly: AssemblyProduct("MvcApplication1")]
[assembly: AssemblyCopyright("Copyright ©  2014")]
[assembly: AssemblyTrademark("")]
[assembly: AssemblyCulture("")]

// Setting ComVisible to false makes the types in this assembly not visible
// to COM components.  If you need to access a type in this assembly from
// COM, set the ComVisible attribute to true on that type.
[assembly: ComVisible(false)]

// The following GUID is for the ID of the typelib if this project is exposed to COM
[assembly: Guid("98a0cfd0-fae7-43dd-8626-b49f8df939be")]

// Version information for an assembly consists of the following four values:
//
//      Major Version
//      Minor Version
//      Build Number
//      Revision
//
// You can specify all the values or you can default the Revision and Build Numbers
// by using the '*' as shown below:
[assembly: AssemblyVersion("1.0.0.0")]
[assembly: AssemblyFileVersion("1.0.0.0")]
[assembly: System.Web.PreApplicationStartMethod(typeof(MvcApplication1.PreApplicationStartCode), "PreStart")]