1 namespace MvcEdu.Filters
 2 {
 3     public class LocalizationAttribute : ActionFilterAttribute
 4     {
 5         public override void OnActionExecuting(ActionExecutingContext filterContext)
 6         {
 7
 8             bool isSkipLocalization = filterContext.ActionDescriptor.IsDefined(typeof(WithoutLocalizationAttribute), inherit: true) || filterContext.ActionDescriptor.ControllerDescriptor.IsDefined(typeof(WithoutLocalizationAttribute), inherit: true);
 9
10             if (!isSkipLocalization)
11             {
12                 if (filterContext.RouteData.Values["lang"] != null && !string.IsNullOrWhiteSpace(filterContext.RouteData.Values["lang"].ToString()))
13                 {
14                     ///从路由数据(url)里设置语言
15                     var lang = filterContext.RouteData.Values["lang"].ToString();
16                     Thread.CurrentThread.CurrentUICulture = CultureInfo.CreateSpecificCulture(lang);
17                 }
18                 else
19                 {
20                     ///从cookie里读取语言设置
21                     var cookie = filterContext.HttpContext.Request.Cookies["Localization.CurrentUICulture"];
22                     var langHeader = string.Empty;
23                     if (cookie != null && cookie.Value != "")
24                     {
25                         ///根据cookie设置语言
26                         langHeader = cookie.Value;
27                         Thread.CurrentThread.CurrentUICulture = CultureInfo.CreateSpecificCulture(langHeader);
28                     }
29                     else
30                     {
31                         ///如果读取cookie失败则设置默认语言
32                         langHeader = filterContext.HttpContext.Request.UserLanguages[0];
33                         Thread.CurrentThread.CurrentUICulture = CultureInfo.CreateSpecificCulture(langHeader);
34                     }
35                     ///把语言值设置到路由值里
36                     filterContext.RouteData.Values["lang"] = langHeader;
37                     //如果url中不包含语言设置则重定向到包含语言值设置的url里
38                     string ReturnUrl = $"/{filterContext.RouteData.Values["lang"]}/{filterContext.RouteData.Values["controller"]}/{filterContext.RouteData.Values["action"]}";
39                     filterContext.Result = new RedirectResult(ReturnUrl);
40                 }
41
42                 /// 把设置保存进cookie
43                 HttpCookie _cookie = new HttpCookie("Localization.CurrentUICulture", Thread.CurrentThread.CurrentUICulture.Name);
44                 _cookie.Expires = DateTime.Now.AddYears(1);
45                 filterContext.HttpContext.Response.SetCookie(_cookie);
46
47                 base.OnActionExecuting(filterContext);
48             }
49
50         }
51     }
52
53     public class WithoutLocalizationAttribute : Attribute
54     {
55     }
56 }

 1 namespace MvcEdu
 2 {
 3     public class RouteConfig
 4     {
 5         public static void RegisterRoutes(RouteCollection routes)
 6         {
 7             routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
 8
 9             routes.MapRoute(
10               name: "Localization", // 路由名称
11               url: "{lang}/{controller}/{action}/{id}", // 带有参数的 URL\
12               constraints: new { lang = "zh-CN|en-US|ja-JP" }, //限制可输入的语言项
13               defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }//参数默认值
14             );
15
16             routes.MapRoute(
17                 name: "Default",
18                 url: "{controller}/{action}/{id}",
19                 defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
20             );
21         }
22     }
23 }

 1 namespace MvcEdu.Controllers
 2 {
 3     [Localization] //HomeController里的函数都要走Localization过滤器
 4     public class HomeController : Controller
 5     {
 6         public ActionResult Index()
 7         {
 8             ViewBag.Title = Resources.Language.Title;//页面中的Title值取语言文件里的Title值
 9             return View();
10         }
11
12         public ActionResult About()
13         {
14             ViewBag.Title = Resources.Language.Title;//页面中的Title值取语言文件里的Title值
15             ViewBag.Message = "Your application description page.";
16
17             return View();
18         }
19
20         public ActionResult Contact()
21         {
22             ViewBag.Title = Resources.Language.Title;//页面中的Title值取语言文件里的Title值
23             ViewBag.Message = "Your contact page.";
24
25             return View();
26         }
27         [WithoutLocalization]//这个函数不走Localization过滤器
28         public ActionResult ChangeLanguage(String NewLang, String ReturnUrl)
29         {
30             if (!ReturnUrl.EndsWith("/"))
31             {
32                 ReturnUrl += "/";
33             }
34             //use NewLang replace old lang,include input judgment
35             if (!string.IsNullOrEmpty(ReturnUrl) && ReturnUrl.Length > 3 && ReturnUrl.StartsWith("/") && ReturnUrl.IndexOf("/", 1) > 0 && new string[] { "zh-CN", "en-US","ja-JP" }.Contains(ReturnUrl.Substring(1, ReturnUrl.IndexOf("/", 1) - 1)))
36             {
37                 ReturnUrl = $"/{NewLang}{ReturnUrl.Substring(ReturnUrl.IndexOf("/", 1))}";
38             }
39             else
40             {
41                 ReturnUrl = $"/{NewLang}{ReturnUrl}";
42             }
43             return Redirect(ReturnUrl);//redirect to new url
44         }
45     }
46 }

1 /// <summary>
2         ///  查找类似 标题 的本地化字符串。
3         /// </summary>
4         internal static string Title {
5             get {
6                 return ResourceManager.GetString("Title", resourceCulture);
7             }
8         }

 1 <div class="navbar-collapse collapse">
 2                 <ul class="nav navbar-nav">
 3                     <li>@Html.ActionLink("主页", "Index", "Home")</li>
 4                     <li>@Html.ActionLink("关于", "About", "Home")</li>
 5                     <li>@Html.ActionLink("联系方式", "Contact", "Home")</li>
 6                     @*以下是添加的内容*@
 7                     <li>@Html.ActionLink("en-US", "ChangeLanguage", "Home",new { NewLang = "en-US",ReturnUrl=Request.RawUrl},new { @class="testclass"})</li>
 8                     <li>@Html.ActionLink("zh-CN", "ChangeLanguage", "Home", new { NewLang = "zh-CN", ReturnUrl = Request.RawUrl }, new { @class = "testclass" })</li>
 9                     <li>@Html.ActionLink("ja-JP", "ChangeLanguage", "Home", new { NewLang = "ja-JP", ReturnUrl = Request.RawUrl }, new { @class = "testclass" })</li>
10                 </ul>
11             </div>