问使用多个路由的本地化ViewEngines

EN

routes.MapRoute(
                "Localization", // Route name
                "{lang}/{controller}/{action}", // URL with parameters
                new { lang = "pt", controller = "Home", action = "Index" } //defaults
);

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Globalization;

namespace Ala.MultiLanguage
{
    public class LocalizedViewLocation : RazorViewEngine
    {
        private static readonly string[] _emptyLocations = new string[0];

        public string[] LocalizedViewLocationFormats { get; set; }

        public string[] LocalizedMasterLocationFormats { get; set; }

        protected string[] LocalizedPartialViewLocationFormats { get; set; }

        public LocalizedViewLocation()
        {
            // Define the localized view locations
            //  0: Language
            //  1: View name
            //  2: Controller name

            LocalizedViewLocationFormats = new[] {
            "~/Views/{0}/{2}/{1}.cshtml",
            "~/Views/Shared/{0}/{1}.cshtml"};

            MasterLocationFormats = new[] {
            "~/Views/{0}/{2}/{1}.cshtml",
            "~/Views/Shared/{0}/{1}.cshtml"};

            LocalizedPartialViewLocationFormats = new[] {
            "~/Views/{0}/{2}/{1}.cshtml",
            "~/Views/Shared/{0}/{1}.cshtml"};
        }


        public override ViewEngineResult FindPartialView(ControllerContext controllerContext, string partialViewName, bool useCache)
        {
            if (controllerContext == null)
                throw new ArgumentNullException("controllerContext");

            if (String.IsNullOrEmpty(partialViewName))
                throw new ArgumentException("Parameter partialViewName is null or empty.", "partialViewName");

            string[] searched;

            var controllerName = controllerContext.RouteData.GetRequiredString("controller");

            var partialPath = GetPath(controllerContext, LocalizedPartialViewLocationFormats, partialViewName, controllerName, out searched);


            if (String.IsNullOrEmpty(partialPath))
            {
                var baseRes = base.FindPartialView(controllerContext, partialViewName, useCache);

                if (baseRes.View != null)
                    return baseRes;

                return new ViewEngineResult(searched.Union(baseRes.SearchedLocations));
            }

            return new ViewEngineResult(CreatePartialView(controllerContext, partialPath), this);
        }

        public override ViewEngineResult FindView(ControllerContext controllerContext, string viewName, string masterName, bool useCache)
        {
            if (controllerContext == null)
                throw new ArgumentNullException("controllerContext");

            if (String.IsNullOrEmpty(viewName))
                throw new ArgumentException("Parameter viewName is null or empty.", "viewName");

            string[] viewLocationsSearched;

            string[] masterLocationsSearched;

            var controllerName = controllerContext.RouteData.GetRequiredString("controller");

            var viewPath = GetPath(controllerContext, LocalizedViewLocationFormats, viewName, controllerName, out viewLocationsSearched);

            var masterPath = GetPath(controllerContext, LocalizedMasterLocationFormats, masterName, controllerName, out masterLocationsSearched);


            if (String.IsNullOrEmpty(viewPath) || (String.IsNullOrEmpty(masterPath) && !String.IsNullOrEmpty(masterName)))
            {
                var baseRes = base.FindView(controllerContext, viewName, masterName, useCache);

                if (baseRes.View != null)
                    return baseRes;

                return new ViewEngineResult(viewLocationsSearched.Union(masterLocationsSearched).Union(baseRes.SearchedLocations));
            }

            return new ViewEngineResult(CreateView(controllerContext, viewPath, masterPath), this);
        }


        private string GetPath(ControllerContext controllerContext, string[] locations, string name, string controllerName, out string[] searchedLocations)
        {
            searchedLocations = _emptyLocations;

            if (String.IsNullOrEmpty(name))
                return String.Empty;

            if (IsSpecificPath(name))
                return String.Empty;

            return GetPathFromGeneralName(controllerContext, locations, name, controllerName, ref searchedLocations);
        }


        private static bool IsSpecificPath(string name)
        {
            char c = name[0];
            return (c == '~' || c == '/');
        }

        private string GetPathFromGeneralName(ControllerContext controllerContext, string[] locations, string name, string controllerName, ref string[] searchedLocations)
        {
            var result = String.Empty;

            searchedLocations = new string[locations.Length];

            for (int i = 0; i < locations.Length; i++)
            {
                var location = locations[i];

                var virtualPath = string.Format(CultureInfo.InvariantCulture, location, CultureInfo.CurrentUICulture.TwoLetterISOLanguageName, name, controllerName);

                if (FileExists(controllerContext, virtualPath))
                {
                    searchedLocations = _emptyLocations;

                    result = virtualPath;

                    break;
                }

                searchedLocations[i] = virtualPath;
            }

            return result;
        }
    }
}