Why does not work ASP.NET Core Localization

Question

I created an empty project.

Startup.cs

public void ConfigureServices(IServiceCollection services)
{
    services.AddLocalization(s => s.ResourcesPath = "Resources");
    var supportedCultures = new CultureInfo[]
    {
        new CultureInfo("de-CH"),
        new CultureInfo("en-GB"),
    };

    services.Configure<RequestLocalizationOptions>(s =>
    {
        s.SupportedCultures = supportedCultures;
        s.SupportedUICultures = supportedCultures;
        s.DefaultRequestCulture = new RequestCulture(culture: "de-CH", uiCulture: "de-CH");
    });

    services.AddMvc()
        .AddViewLocalization(LanguageViewLocationExpanderFormat.Suffix)
        .AddDataAnnotationsLocalization();
}


public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
{

    app.UseStaticFiles();

    // Using localization 
    var locOptions = app.ApplicationServices.GetService<IOptions<RequestLocalizationOptions>>();
    app.UseRequestLocalization(locOptions.Value);

    app.UseMvc();
}

Folder Structure

Resources
|
|--Controllers 
|       HomeController.de.resx
|       HomeController.en.resx
|       HomeController.resx

Controller

public class HomeController : Controller
{
    private readonly IStringLocalizer<HomeController> _stringLocalizer;

    public HomeController(IStringLocalizer<HomeController> stringLocalizer)
    {
        _stringLocalizer = stringLocalizer;
    }

    public IActionResult Index()
    {
        string testValue = _stringLocalizer["Test"];
        return View();
    }
}

I'm new about asp.net core, I'm just trying to understand, Why testValue always return Test, it's a bit confusing. I'm doing something wrong? i will be happy if u help me.

Answer 1

Just add the package Microsoft.Extensions.Localization
After do that, it works.
The ResourcePath is optional, and if you leave it null, the resource files organization style is the same that classic Asp.Net application (in the same location of the target classes).

Answer 2

Two different errors here prevent correct loading of localized resources.

1. You set incorrect ResourcesPath in AddLocalization() call. Since your resx files are placed in Resources/Controllers directory, you should replace call

   services.AddLocalization(s => s.ResourcesPath = "Resources");
   

   with

   services.AddLocalization(s => s.ResourcesPath = "Resources/Controllers");
   

2. You use incorrect name for resx files. Check Resource file naming section in Globalization and localization in ASP.NET Core article:

   Resources are named for the full type name of their class minus the assembly name. For example, a French resource in a project whose main assembly is LocalizationWebsite.Web.dll for the class LocalizationWebsite.Web.Startup would be named Startup.fr.resx. A resource for the class LocalizationWebsite.Web.Controllers.HomeController would be named Controllers.HomeController.fr.resx. If your targeted class's namespace isn't the same as the assembly name you will need the full type name. For example, in the sample project a resource for the type ExtraNamespace.Tools would be named ExtraNamespace.Tools.fr.resx.

   So if your assembly is called TestMvcApplication and HomeController resides in namespace TestMvcApplication.Controllers, then you should call your resx files in the following way:

   Resources
   |
   |--Controllers 
   |       Controllers.HomeController.de.resx
   |       Controllers.HomeController.en.resx
   |       Controllers.HomeController.resx
   

I believe after you make above changes to your project, localization will work ok.

Answer 3

I fixed it, by making sure that my folder structure reflected the namespace I used when working with resource designer files !!

Answer 4

Make sure the "SharedResources.cs" has the same namespace as the project's name that contains it.