ASP.NET MVC Grobal.asax.cs sample for redirect no trailing slash url.

RedirectNoTrailingSlashUrl.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;
using System.Web.Security;

namespace MyMvcWebSite
{
    // メモ: IIS6 または IIS7 のクラシック モードの詳細については、
    // http://go.microsoft.com/?LinkId=9394801 を参照してください

    public class MvcApplication : System.Web.HttpApplication
    {
        public static void RegisterRoutes(RouteCollection routes)
        {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

            routes.Add("Root", 
                new TrailingSlashRoute(
                    "", 
                    new RouteValueDictionary( new { controller = "Home", action = "Index" } ),
                    new TrailingSlashRouteHandler(),
                    "Index"
                )
            );

        }

        protected void Application_Start()
        {
            AreaRegistration.RegisterAllAreas();

            RegisterRoutes(RouteTable.Routes);
            
        }

    }


    public class TrailingSlashRoute : Route
    {
        public TrailingSlashRoute(string url, RouteValueDictionary defaults, IRouteHandler routeHandler, string redirectActionName)
            : base(url, defaults, routeHandler)
        {
            this.RedirectActionName = redirectActionName;
        }

        public string RedirectActionName { get; set; }
    }

    public class TrailingSlashRouteHandler : IRouteHandler
    {

        #region IRouteHandler メンバー

        IHttpHandler IRouteHandler.GetHttpHandler(RequestContext requestContext)
        {
            return new TrailingSlashHandler(requestContext);
        }

        #endregion
    }

    public class TrailingSlashHandler : MvcHandler
    {
        public TrailingSlashHandler(RequestContext requestContext) : base(requestContext) { }

        protected override IAsyncResult BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, object state)
        {
            String absolutePath = httpContext.Request.Url.AbsolutePath;

            if (absolutePath.EndsWith("/") == false)
            {
                httpContext.Response.StatusCode = 301;
                httpContext.Response.AddHeader("Location", absolutePath + "/");
            }

            return base.BeginProcessRequest(httpContext, callback, state);

        }


        protected override void EndProcessRequest(IAsyncResult asyncResult)
        {
            base.EndProcessRequest(asyncResult);
        }
    }

}