MVC 错误页处理

Global.asax ：

        protected void Application_Error(object sender, EventArgs e)
        {
            Exception exception = Server.GetLastError();
            Response.Clear();
            HttpException httpException = exception as HttpException;
            RouteData routeData = new RouteData();
            routeData.Values.Add("controller", "Error");
            if (httpException == null)
            {
                routeData.Values.Add("action", "Index");
            }
            else //It's an Http Exception, Let's handle it.  
            {
                switch (httpException.GetHttpCode())
                {
                    case 400:
                        routeData.Values.Add("action", "HttpError400");
                        break;
                    case 404:
                        // Page not found.  
                        routeData.Values.Add("action", "HttpError404");
                        break;
                    case 500:
                        // Server error.  
                        routeData.Values.Add("action", "HttpError500");
                        break;
                    // Here you can handle Views to other error codes.  
                    // I choose a General error template    
                    default:
                        routeData.Values.Add("action", "General");
                        break;
                }
            }
            // Pass exception details to the target error View.  
            routeData.Values.Add("error", exception.Message);
            // Clear the error on server.  
            Server.ClearError();
            // Call target Controller and pass the routeData.  
            IController errorController = new MvcApplication1.Controllers.ErrorController();
            errorController.Execute(new RequestContext(
           new HttpContextWrapper(Context), routeData));  

        }

Controllers ：

    public class ErrorController : Controller
    {
        public ActionResult Index(string error)
        {
            ViewData["Title"] = "WebSite 网站内部错误";
            ViewData["Description"] = error;
            return View("Index");
        }
        public ActionResult HttpError400(string error)
        { 
            ViewData["Title"] = "HTTP 400- 无法找到文件";
            ViewData["Description"] = error;
            return View("Index");
        }
        public ActionResult HttpError404(string error)
        {
            ViewData["Title"] = "HTTP 404- 无法找到文件";
            ViewData["Description"] = error;
            return View("Index");
        }
        public ActionResult HttpError500(string error)
        {
            ViewData["Title"] = "HTTP 500 - 内部服务器错误";
            ViewData["Description"] = error;
            return View("Index");
        }
        public ActionResult General(string error)
        {
            ViewData["Title"] = "HTTP 发生错误";
            ViewData["Description"] = error;
            return View("Index");
        }  


    }

view ：

@{
    ViewBag.Title = "Index";
}

<h1>@ViewData["Description"]</h1>