1.在StartupConfigureServices註冊本地化所需要的服務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("zh-cn");//設定系統預設語言
                options.SupportedCultures 
 
= supportedCultures;
                options.SupportedUICultures = supportedCultures;
                options.RequestCultureProviders = new List<IRequestCultureProvider> { new RouteDataRequestCultureProvider() };
            });
            services.Configure<RouteOptions>(options =>
            {
                options.ConstraintMap.Add(
 
"culture", typeof(LanguageRouteConstraint));
            });
            services.AddControllers().AddDataAnnotationsLocalization(options =>
 {
                //用於模型驗證
 options.DataAnnotationLocalizerProvider = (type, factory) =>
 factory.Create(typeof(SharedResource));
 });
        }

2.在Startup.cs類的Configure方法中新增請求本地化中介軟體。

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

3.新增RouteDataRequestCultureProvider類，並繼承RequestCultureProvider

RequestCultureProvider 說明：它使用簡單的委託來確定當前的本地化區域性，當然我們還可以通過RequestCultureProvider自定義源的請求區域資訊比如說配置檔案或者資料庫都是可以的.或者說我們可以選用預設的一些方式讓我們去獲取到當前區域.

 public class RouteDataRequestCultureProvider : RequestCultureProvider
 {
 public override Task<ProviderCultureResult> DetermineProviderCultureResult(HttpContext httpContext)
 {
 //在這裡切換系統語言
 //以下是通過Headers傳值來切換語言，你也可以通過路由、cookie、url傳值來切換
 if (httpContext == null)
 {
 throw new ArgumentNullException(nameof(httpContext));
 }
 var listCulture = new List<string> { "zh-cn", "en-us" };
 string culture = httpContext.Request.Headers["culture"].ToString() ?? "zh-cn";
 string uiCulture = culture = listCulture.Contains(culture) ? culture : "zh-cn";
 var providerResultCulture = new ProviderCultureResult(culture, uiCulture);
 return Task.FromResult(providerResultCulture);
 }
 }

4.新增區域資原始檔 SharedResource.resx

5.測試，以下我是使用swagger測試

    [Route("api/[controller]")]
    [ApiController]
    public class HomeController : BaseController
    {
        private readonly IStringLocalizer<SharedResource> localizer;
        public HomeController(IStringLocalizer<SharedResource> localizer)
        {
            this.localizer = localizer;
        }

        [HttpPost]
        [Route("Get")]
        public string Get()
        {
            return localizer["Birthday"];
        }
    }

模型驗證本地化

1.新增UserInfo

  public class UserInfo
    {
        /// <summary>
        /// 手機電話
        /// </summary>
        [Display(Name = "MobilePhone")]
        [Required(ErrorMessage = "String1")]
        [StringLength(20)]
        public string MobilePhone { get; set; }
    }

2.新增測試方法

        [HttpPost]
        [Route("Add")]
        public bool Add(UserInfo user)
        {
            return true;
        }

3.測試效果

參考資料：https://www.cnblogs.com/netlock/p/13408376.html