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ASP.NET Core WebAPI實(shí)現(xiàn)本地化(單資源文件)

更新時(shí)間：2020年06月04日 09:47:12 作者：HueiFeng

這篇文章主要介紹了ASP.NET Core WebAPI實(shí)現(xiàn)本地化(單資源文件),文中通過(guò)示例代碼介紹的非常詳細(xì)，對(duì)大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價(jià)值，需要的朋友們下面隨著小編來(lái)一起學(xué)習(xí)學(xué)習(xí)吧

在Startup ConfigureServices 注冊(cè)本地化所需要的服務(wù)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類的Configure 方法中添加請(qǐng)求本地化中間件。

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

RequestCultureProvider 它使用簡(jiǎn)單的委托來(lái)確定當(dāng)前的本地化區(qū)域性，當(dāng)然我們還可以通過(guò)RequestCultureProvider自定義源的請(qǐng)求區(qū)域信息比如說(shuō)配置文件或者數(shù)據(jù)庫(kù)都是可以的.或者說(shuō)我們可以選用默認(rèn)的一些方式讓我們?nèi)カ@取到當(dāng)前區(qū)域.

ASP.NET Core 本地化默認(rèn)向我們提供了四個(gè)方式，可用于確定正在執(zhí)行的請(qǐng)求的當(dāng)前區(qū)域性：

QueryStringRequestCultureProvider
CookieRequestCultureProvider
AcceptLanguageHeaderRequestCultureProvider
CustomRequestCultureProvider

如下所示我將通過(guò)路由的方式,去確定當(dāng)前區(qū)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);
  }
 }

通過(guò)如下代碼片段實(shí)現(xiàn)IRouteConstraint對(duì)路由做相應(yīng)的約束

 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";
  }
 }

添加區(qū)域資源文件

注入IStringLocalizer<T>，StringLocalizer將通過(guò)傳遞的共享資源(T)的值映射到資源文件,然后將本地化根據(jù)字符串的名稱從資源文件返回響應(yīng)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"];
  }
 }

如下圖所示

Reference

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

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