ASP.NET MVC 多语言实现—

考虑实现一个完整的基于asp.net mvc的多语言解决方案，从路由到model再到view最后到数据库设计(先挖好坑，后面看能填多少)。

我所见过的多语言做得最好的网站莫过于微软的msdn了，就先从模仿它的路由开始

仅实现相同的url格式很简单，只要将默认的路由加上一个表示语言的变量就可以了

public static void RegisterRoutes(RouteCollection routes)

        {
　　　　　　　//other routes

            routes.MapRoute(

                name: "Default",

                url: "{culture}/{controller}/{action}/{id}",

                constraints: new { culture = "zh-cn|en-us" },

                defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }

            );

        }

然后就可以通过类似 /zh-cn/home/index或/en-us/home/index 的url访问相应页面。然而仅是这样肯定没什么实际性的作用，之前浏览过很多多语言站点，发现url里面有代表语言的都是基本都是以zh或zh-cn代表中文，en或en-us代表English，这一定有什么联系；C#有一个表示区域信息的class CultureInfo，通过设置线程的区域信息来调整某些内容的默认展示方式，最常见的就是日期格式的显示。culture的值可参照 http://www1.cs.columbia.edu/~lok/csharp/refdocs/System.Globalization/types/CultureInfo.html，当然一个Website没人有精力去支持所有语言，可以通过mvc的路由去限制，上面限制了仅中文简体(zh-cn)和美式英语(en-us)。mvc执行过程中与culture有关的步骤大概有Controller激活(不确定)->Action的Model绑定->Action执行->View呈现，因此只要在asp.net为一个客户端请求调用一个线程到使用该线程执行Controller Action的这段过程中加入设置culture的操作就能达到目的，我用的则是ActionFilter：

using System;

using System.Globalization;

using System.Threading;

using System.Web.Mvc;

/************************************************************************************************************************************************

 * Class Name : InternationalizationAttribute.cs

 * Create Date: Tue, ‎Jan ‎12, ‎2016

 * Last Update: Thur, ‎Jan 12, ‎2016

 * Description: Set Culture. learn from http://stackoverflow.com/questions/1560796/set-culture-in-an-asp-net-mvc-app.

 * Author     : Cameron

 ************************************************************************************************************************************************/

[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = false)]

public sealed class InternationalizationAttribute : ActionFilterAttribute

{

    public override void OnActionExecuting(ActionExecutingContext filterContext)

    {

        bool isSkipInternationalize = filterContext.ActionDescriptor.IsDefined(typeof(WithoutInternationalizationAttribute), inherit: true)

                                        || filterContext.ActionDescriptor.ControllerDescriptor.IsDefined(typeof(WithoutInternationalizationAttribute), inherit: true);

        if (!isSkipInternationalize)

        {

            string culture = (string)filterContext.RouteData.Values["culture"];

            //if (string.IsNullOrEmpty(culture))

            //{

            //    System.Web.HttpCookie cookieCulture = filterContext.HttpContext.Request.Cookies["culture"];

            //    if (cookieCulture == null)

            //        filterContext.RouteData.Values.Add("culture", "zh-cn");

            //    else

            //        filterContext.RouteData.Values.Add("culture", cookieCulture.Value);

            //    filterContext.HttpContext.Response.RedirectToRoute("Default");

            //}

            //else {

            //filterContext.RequestContext.HttpContext.User

            Thread.CurrentThread.CurrentCulture = CultureInfo.GetCultureInfo(culture);

            Thread.CurrentThread.CurrentUICulture = CultureInfo.GetCultureInfo(culture);

            //}

        }

    }

}

/// <summary>

/// Actions and controllers with the WithoutInternationalization attribute are skipped by the InternationalizationAttribute.

/// </summary>

[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = false)]

public sealed class WithoutInternationalizationAttribute : Attribute

{

}

相应controller代码：

    [Internationalization]

    public class HomeController : Controller

    {

        public ActionResult Index()

        {

            return View();

        }

        public ActionResult Login()

        {

            return View();

        }

        [HttpPost]

        public ActionResult Login(LoginViewModel loginModel)

        {

            return View();

        }

        [WithoutInternationalization]

        public ActionResult ChooseCulture(string culture, string returnUrl)

        {

            //string url = GetApplicationPath(HttpContext.Request) + "/aaaa/bbb?c=5";

            //var request = new HttpRequest(null, Request.Url.AbsoluteUri, "");

            //var response = new HttpResponse(new System.IO.StringWriter());

            //var httpContext = new HttpContext(request, response);

            //var routeData = System.Web.Routing.RouteTable.Routes.GetRouteData(new HttpContextWrapper(httpContext));

            //var values = routeData.Values;

            //HttpCookie cookieCulture = Request.Cookies["culture"];

            //var originalCulture = RouteData.Values["culture"];

            //if (cookieCulture == null)

            //{

            //    RouteData.Values.Add("culture", "zh-cn");

            //}

            //else {

            //}

            //写得有点死，有待改进

            if (!returnUrl.EndsWith("/"))

                returnUrl += "/";

            if (!string.IsNullOrEmpty(returnUrl) && returnUrl.Length >  && returnUrl.StartsWith("/") && returnUrl.IndexOf("/", ) >  && new string[] { "zh-cn", "en-us" }.Contains(returnUrl.Substring(, returnUrl.IndexOf("/", ) - )))

                returnUrl = $"/{culture}{returnUrl.Substring(returnUrl.IndexOf("/", 1))}";

            else

                returnUrl = $"/{culture}{returnUrl}";

            return Redirect(returnUrl);

        }

    }

Layout View 选择语言部分代码：

@using Resources

<!DOCTYPE html>

<html>

<head>

    <meta charset="utf-8" />

    <meta name="viewport" content="width=device-width, initial-scale=1.0">

    <title>@ViewBag.Title - @Resource1.my_app</title>

    @Styles.Render("~/Content/css")

    @Scripts.Render("~/bundles/modernizr")

</head>

<body>

    <div class="navbar navbar-inverse navbar-fixed-top">

        <div class="container">

            <div class="navbar-header">

                <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">

                    <span class="icon-bar"></span>

                    <span class="icon-bar"></span>

                    <span class="icon-bar"></span>

                </button>

                @Html.ActionLink(Resource1.app_name, "Index", "Home", new { area = "" }, new { @class = "navbar-brand" })

            </div>

            <div class="navbar-collapse collapse">

                <ul class="nav navbar-nav">

                    <li>@Html.ActionLink(Resource1.home, "Index", "Home")</li>

                    <li>@Html.ActionLink("中文", "ChooseCulture", new { culture = "zh-cn", returnUrl = Request.RawUrl })</li>

                    <li>@Html.ActionLink("English", "ChooseCulture", new { culture = "en-us", returnUrl = Request.RawUrl })</li>

                </ul>

                <ul class="nav navbar-nav navbar-right">

                    <li>@Html.ActionLink(Resource1.Login, "Login", "Home")</li>

                </ul>

            </div>

        </div>

    </div>

    <div class="container body-content">

        @RenderBody()

        <hr />

        <footer>

            <p>&copy; @DateTime.Now.Year - @Resource1.my_app</p>

        </footer>

    </div>

    @Scripts.Render("~/bundles/jquery")

    @Scripts.Render("~/bundles/bootstrap")

    @RenderSection("scripts", required: false)

</body>

</html>

This is my first bolg...

附上Artech大神的另一种实现方式,http://www.cnblogs.com/artech/archive/2012/05/04/localization-via-url-routing.html

巴特西

ASP.NET MVC 多语言实现——URL路由

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