Asp.Net Core 2.1 Localization - localization

Question

i'm new to asp.net core trying to implement localization to support multiple language , my configuration is like this
services.AddLocalization(options => options.ResourcesPath = "Resources");
services.Configure<RequestLocalizationOptions>(options =>
{
var supportedCultures = new[]
{
new CultureInfo("en-US"),
new CultureInfo("fr-FR")
};
options.DefaultRequestCulture = new RequestCulture(culture: "en-US", uiCulture: "en-US");
options.SupportedCultures = supportedCultures;
options.SupportedUICultures = supportedCultures;
});
services.AddMvc().AddViewLocalization(LanguageViewLocationExpanderFormat.Suffix,opts=> {opts.ResourcesPath="Resources"; })
.AddDataAnnotationsLocalization(o=> {
o.DataAnnotationLocalizerProvider = (type, factory) =>
{
return factory.Create(typeof(SharedResource));
};
});
this is the standard configuration and its working fine , i create a method inside a controller
[Route("api/setlanguage")]
[HttpPost]
public IActionResult SetLanguage (string culture)
{
Response.Cookies.Append(
CookieRequestCultureProvider.DefaultCookieName,
CookieRequestCultureProvider.MakeCookieValue(new RequestCulture(culture)),
new CookieOptions { Expires = DateTimeOffset.UtcNow.AddYears(1) });
throw new Exception(_localizer["Hello",culture]);
}
when i test with Postman like this : http://localhost:31563/api/SetLanguage?culture=en-US i'm getting a correct result but when i try to pass culture inside the body of request its not working , can anyone help me on this , thanks so much

Answer 1

to make this work i just need to add
System.Threading.Thread.CurrentThread.CurrentUICulture = new CultureInfo(culture);
System.Threading.Thread.CurrentThread.CurrentCulture = new CultureInfo(culture);
to force my currentThread.CurrentCulture/UICulture to take the culture value that i'm passing from body
public IActionResult SetLanguage([FromBody] string culture)
{
System.Threading.Thread.CurrentThread.CurrentUICulture = new CultureInfo(culture);
System.Threading.Thread.CurrentThread.CurrentCulture = new CultureInfo(culture);
_localizer.WithCulture(new CultureInfo(culture));
}

Answer 2

By default, Web API parameter will get value from query string if you use like (string culture).
If you want to get value from Body, you could add [FromBody] like below:
public IActionResult SetLanguage([FromBody]string culture)
And then post your request like below:
Obviously, it will not work with Query String request if you add [FromBody].