[原]ASP.NET MVC 3 Razor 多國語言參考解決方案 補充三

原以為可以使用之前的多國語言方案進行編程了，沒想到第一個正式點的頁面就卡了，為什麼呢，因為通過HtmlHelper只能找到當前請求的View是哪個，如果這個View使用了Layout或是Partial就歇菜了。通過一番嘗試，發現使用HtmlHelper.ViewDataContainer屬性可以獲得一個WebViewPage對象，這個對象中的VirtualPath對象代表當前正在Excute的頁面屬於哪個物理檔案(.cshtml)，於是修改代碼如下:

    public static class LocalizationHelper    {        public static string Lang(this HtmlHelper htmlhelper, string key)        {            var viewPath = (htmlhelper.ViewDataContainer as WebViewPage).VirtualPath;            var viewName = viewPath.Substring(viewPath.LastIndexOf('/'), viewPath.Length - viewPath.LastIndexOf('/')).TrimStart('/');            var filePath = htmlhelper.ViewContext.HttpContext.Server.MapPath(viewPath.Substring(0, viewPath.LastIndexOf('/') + 1)) + "App_LocalResources";            var langs = htmlhelper.ViewContext.HttpContext.Request.UserLanguages.Union<string>(new string[] { "" });            IEnumerable<DictionaryEntry> resxs = null;            foreach (var lang in langs)            {                var resxKey =                    string.IsNullOrWhiteSpace(lang) ? string.Format(@"{0}\{1}.resx", filePath, viewName) : string.Format(@"{0}\{1}.{2}.resx", filePath, viewName, lang);                resxs = GetResx(resxKey);                if (resxs != null) { break; }            }            return (string)resxs.FirstOrDefault<DictionaryEntry>(x => x.Key.ToString() == key).Value;        }        private static IEnumerable<DictionaryEntry> GetResx(string resxKey)        {            ObjectCache cache = MemoryCache.Default;            IEnumerable<DictionaryEntry> resxs = null;            if (cache.Contains(resxKey))            {                resxs = cache.GetCacheItem(resxKey).Value as IEnumerable<DictionaryEntry>;            }            else            {                if (File.Exists(resxKey))                {                    resxs = new ResXResourceReader(resxKey).Cast<DictionaryEntry>();                    cache.Add(resxKey, resxs, new CacheItemPolicy() { Priority = CacheItemPriority.NotRemovable });                }            }            return resxs;        }    }