ASP.NET MVC 3 Razor 多國語言參考解決方案 補充三

轉自 http://www.cnblogs.com/think8848/archive/2011/03/20/1989376.html

 

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;

}

}