ASP.NET MVC Application Global

global.asax.cs

namespace Web
{
    using System;
    using System.Web;
    using System.Web.Http;
    using System.Web.Mvc;
    using System.Web.Optimization;
    using System.Web.Routing;

    using NLog;

    using Web.Controllers;

    public class MvcApplication : HttpApplication
    {        
        protected void Application_Start()
        {
            BundleTable.Bundles.RegisterTemplateBundles();

            var xml = GlobalConfiguration.Configuration.Formatters.XmlFormatter;
            xml.UseXmlSerializer = true;
        }

        protected void Application_Error(object sender, EventArgs e)
        {           
            var exception = Server.GetLastError();
            
            LogManager.GetCurrentClassLogger().ErrorException("An error has occured", exception);

            Response.Clear();

            if (exception.Message.Contains("did not return a controller for the name"))
            {
                exception = new HttpException(404, exception.Message);
            }

            var httpException = exception as HttpException;
            var ua = exception as UnauthorizedAccessException;

            var routeData = new RouteData();
            routeData.Values.Add("controller", "Error");

            if (httpException == null)
            {
                if (ua == null)
                {
                    routeData.Values.Add("action", "ServerError500");
                }
                else
                {
                    routeData.Values.Add("action", "Unauthorised403");
                }
            }
            else
            {
                switch (httpException.GetHttpCode())
                {
                    case 401:
                        routeData.Values.Add("action", "Unauthorised403");
                        break;
                    case 404:
                        routeData.Values.Add("page", exception.Message);
                        routeData.Values.Add("action", "PageNotFound404");
                        break;
                    case 500:
                        routeData.Values.Add("action", "ServerError500");
                        break;

                    default:
                        routeData.Values.Add("action", "General");
                        break;
                }
            }

            // Pass exception details to the target error View.
            routeData.Values.Add("error", exception);

            // Clear the error on server.
            Server.ClearError();

            // Avoid IIS7 getting in the middle
            Response.TrySkipIisCustomErrors = true;

            // Call target Controller and pass the routeData.
            IController errorController = new ErrorController();
            errorController.Execute(new RequestContext(new HttpContextWrapper(Context), routeData));
        }
    }
}