Set Culture in an ASP.Net MVC app

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I’m using this localization method and added a route parameter that sets the culture and language whenever a user visits example.com/xx-xx/

Example:

routes.MapRoute("DefaultLocalized",
            "{language}-{culture}/{controller}/{action}/{id}",
            new
            {
                controller = "Home",
                action = "Index",
                id = "",
                language = "nl",
                culture = "NL"
            });

I have a filter that does the actual culture/language setting:

using System.Globalization;
using System.Threading;
using System.Web.Mvc;

public class InternationalizationAttribute : ActionFilterAttribute {

    public override void OnActionExecuting(ActionExecutingContext filterContext) {

        string language = (string)filterContext.RouteData.Values["language"] ?? "nl";
        string culture = (string)filterContext.RouteData.Values["culture"] ?? "NL";

        Thread.CurrentThread.CurrentCulture = CultureInfo.GetCultureInfo(string.Format("{0}-{1}", language, culture));
        Thread.CurrentThread.CurrentUICulture = CultureInfo.GetCultureInfo(string.Format("{0}-{1}", language, culture));

    }
}

To activate the Internationalization attribute, simply add it to your class:

[Internationalization]
public class HomeController : Controller {
...

Now whenever a visitor goes to http://example.com/de-DE/Home/Index the German site is displayed.

I hope this answers points you in the right direction.

I also made a small MVC 5 example project which you can find here

Just go to http://{yourhost}:{port}/en-us/home/index to see the current date in English (US), or change it to http://{yourhost}:{port}/de-de/home/index for German etcetera.

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