MVC3过滤器实现多语言

如题，以中英文为例。

一、添加Resources文件

1. 创建Global.resx

2.创建Global.en-US.resx

3.向Global.resx和Global.en-US.resx中填入对应的键值

注意：Global.resx 的AccessModifer 要改成Public

 二、添加过滤器

1.创建InternationalizationAttribute类

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

namespace MMSReport.Web.Common
{
    public class InternationalizationAttribute : ActionFilterAttribute 
    {
        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            if (filterContext.RouteData.Values["lang"] != null && !string.IsNullOrWhiteSpace(filterContext.RouteData.Values["lang"].ToString()))
            {
                ///从路由数据(url)里设置语言  
                var lang = filterContext.RouteData.Values["lang"].ToString();
                Thread.CurrentThread.CurrentUICulture = CultureInfo.CreateSpecificCulture(lang);
            }
            else
            {
                ///从cookie里读取语言设置  
                var cookie = filterContext.HttpContext.Request.Cookies["MvcLocalization.CurrentUICulture"];
                var langHeader = string.Empty;
                if (cookie != null)
                {
                    ///根据cookie设置语言  
                    langHeader = cookie.Value;
                    Thread.CurrentThread.CurrentUICulture = CultureInfo.CreateSpecificCulture(langHeader);
                }
                else
                {
                    ///如果读取cookie失败则设置默认语言  
                    langHeader = filterContext.HttpContext.Request.UserLanguages[0];
                    Thread.CurrentThread.CurrentUICulture = CultureInfo.CreateSpecificCulture(langHeader);
                }

                ///把语言值设置到路由值里  
                filterContext.RouteData.Values["lang"] = langHeader;
            }

            /// 把设置保存进cookie  
            HttpCookie _cookie = new HttpCookie("MvcLocalization.CurrentUICulture", Thread.CurrentThread.CurrentUICulture.Name);
            _cookie.Expires = DateTime.Now.AddYears(1);
            filterContext.HttpContext.Response.SetCookie(_cookie);
        }
    }
}

其中使用Cookie记录默认语言

2.文件结构如图

三、设置路由Global.asax

 public class MvcApplication : SpringMvcApplication // System.Web.HttpApplication
    {
        public static void RegisterGlobalFilters(GlobalFilterCollection filters)
        {
            filters.Add(new HandleErrorAttribute());
            filters.Add(new InternationalizationAttribute());
        }

        public static void RegisterRoutes(RouteCollection routes)
        {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

            routes.MapRoute(
               "Globalization", // 路由名称
               "{lang}/{controller}/{action}/{id}", // 带有参数的 URL
               new {  controller = "Home", action = "Index", id = UrlParameter.Optional }, // 参数默认值
               new { lang = "^[a-zA-Z]{2}(-[a-zA-Z]{2})?$" }    //参数约束
           );

            routes.MapRoute(
                "Default", // Route name
                "{controller}/{action}/{id}", // URL with parameters
                new { controller = "Home", action = "Index", id = UrlParameter.Optional } // Parameter defaults
            );

        }

        protected void Application_Start()
        {
            log4net.Config.XmlConfigurator.Configure();

            AreaRegistration.RegisterAllAreas();

            RegisterGlobalFilters(GlobalFilters.Filters);
            RegisterRoutes(RouteTable.Routes);
        }

    }

关键代码：

1. filters.Add(newInternationalizationAttribute());

2.

routes.MapRoute(

"Globalization", // 路由名称  

"{lang}/{controller}/{action}/{id}", // 带有参数的 URL

new { controller = "Home", action = "Index", id = UrlParameter.Optional }, // 参数默认值  

new { lang = "^[a-zA-Z]{2}(-[a-zA-Z]{2})?$" } //参数约束  

);

 四、页面显示

1.HomeController

 public class HomeController : Controller
    {          
        public ActionResult Index()
        {
             return View();
        }

        public ActionResult Index2()
        { 
            return View();
        }

        public ActionResult ChangeLanguage(string lang)
        {
            return new RedirectResult("Index");
        }         
    }

2.Index.cshtml中使用多语言标签替换原来的文字

<h2>Index</h2>
    <div>
        <div>
            <div>
                [ @Html.ActionLink("English", "ChangeLanguage", "Home", new { lang = "en-US" }, null)
                ] [ @Html.ActionLink("中文", "ChangeLanguage", "Home", new { lang = "zh-CN" }, null)
                ]
            </div>
            <div> 
            <span>@MMSReport.Resource.Global.UserName</span>
            <span>@MMSReport.Resource.Global.UserPwd</span>
            </div>
        </div>
      @Html.ActionLink("Index2","Index2")
    </div>

3.Index2.cshtml用来做一个简单的跳转测试

<h2>Index2</h2>

<h1>@MMSReport.Resource.Global.Index2</h1>

      @Html.ActionLink("Index","Index")

五、运行

结束