ASP.NET Core WebAPI实现本地化(单资源文件)

在Startup ConfigureServices 注册本地化所需要的服务AddLocalization和 Configure<RequestLocalizationOptions>

public void ConfigureServices(IServiceCollection services)
 {
  services.AddLocalization();
  services.Configure<RequestLocalizationOptions>(options =>
  {
   var supportedCultures = new List<CultureInfo>
   {
    new CultureInfo("en-us"),
    new CultureInfo("zh-cn")
   };

   options.DefaultRequestCulture = new RequestCulture(culture: "en-us", uiCulture: "en-us");
   options.SupportedCultures = supportedCultures;
   options.SupportedUICultures = supportedCultures;
   options.RequestCultureProviders = new IRequestCultureProvider[] { new RouteDataRequestCultureProvider { IndexOfCulture = 1, IndexofUiCulture = 1 } };
  });
  services.Configure<RouteOptions>(options =>
  {
   options.ConstraintMap.Add("culture", typeof(LanguageRouteConstraint));
  });
  services.AddControllers();
 }

在Startup.cs类的Configure 方法中添加请求本地化中间件。

var localizeOptions = app.ApplicationServices.GetService<IOptions<RequestLocalizationOptions>>();
  app.UseRequestLocalization(localizeOptions.Value);

RequestCultureProvider 它使用简单的委托来确定当前的本地化区域性，当然我们还可以通过RequestCultureProvider自定义源的请求区域信息比如说配置文件或者数据库都是可以的.或者说我们可以选用默认的一些方式让我们去获取到当前区域.

ASP.NET Core 本地化默认向我们提供了四个方式，可用于确定正在执行的请求的当前区域性：

• QueryStringRequestCultureProvider
• CookieRequestCultureProvider
• AcceptLanguageHeaderRequestCultureProvider
• CustomRequestCultureProvider

如下所示我将通过路由的方式,去确定当前区域

public class RouteDataRequestCultureProvider : RequestCultureProvider
 {
  public int IndexOfCulture;
  public int IndexofUiCulture;

  public override Task<ProviderCultureResult> DetermineProviderCultureResult(HttpContext httpContext)
  {
   if (httpContext == null)
    throw new ArgumentNullException(nameof(httpContext));
   string uiCulture;

   string culture = uiCulture = httpContext.Request.Path.Value.Split('/')[IndexOfCulture];

   var providerResultCulture = new ProviderCultureResult(culture, uiCulture);

   return Task.FromResult(providerResultCulture);
  }
 }

通过如下代码片段实现IRouteConstraint对路由做相应的约束

public class LanguageRouteConstraint : IRouteConstraint
{
 public bool Match(HttpContext httpContext, IRouter route, string routeKey, RouteValueDictionary values, RouteDirection routeDirection)
 {

  if (!values.ContainsKey("culture"))
   return false;

  var culture = values["culture"].ToString();
  return culture == "en-us" || culture == "zh-cn";
 }
}

添加区域资源文件

注入IStringLocalizer<T>，StringLocalizer将通过传递的共享资源(T)的值映射到资源文件,然后将本地化根据字符串的名称从资源文件返回响应的值

[Route("{culture:culture}/[controller]")]
[ApiController]
public class HomeController : ControllerBase
{
 private readonly IStringLocalizer<Resource> localizer;
 public HomeController(IStringLocalizer<Resource> localizer)
 {
  this.localizer = localizer;
 }
 public string Get()
 {
  return localizer["Home"];
 }
}

如下图所示

Reference

https://github.com/hueifeng/BlogSample/tree/master/src/LocalizationSingleResx

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原文链接：https://www.cnblogs.com/yyfh/p/12995208.html