.NET WEBAPI 添加中英文切换，国际化项目

项目添加App_GlobalResources文件夹

文件夹下添加资源文件

Language.resx  //为中文资源文件

Language.en-US.resx

 

 新建CultureHandler类

 public class CultureHandler: DelegatingHandler
    {
        private List<string> supportedCulture = new List<string>()
            {
                "zh-CN", "en-US"
            };

        protected override System.Threading.Tasks.Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, System.Threading.CancellationToken cancellationToken)
        {
            HttpHeaderValueCollection<StringWithQualityHeaderValue> acceptedLanguage = request.Headers.AcceptLanguage;
            if (acceptedLanguage != null && acceptedLanguage.Count > 0)
            {
                StringWithQualityHeaderValue preferredLanguage =
                    acceptedLanguage.OrderByDescending(e => e.Quality ?? 1.0D)
                                    .Where(e => !e.Quality.HasValue || e.Quality.Value > 0.0D)
                                    .FirstOrDefault(
                                        e => supportedCulture.Contains(e.Value, StringComparer.OrdinalIgnoreCase));
                if (preferredLanguage != null)
                {
                    Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo(preferredLanguage.Value);
                    // 如需要，此处也可同时设置CurrentCulture属性
                    Thread.CurrentThread.CurrentUICulture = CultureInfo.GetCultureInfo(preferredLanguage.Value);
                }

                if (acceptedLanguage.Any(e => e.Value == "*" && (!e.Quality.HasValue || e.Quality.Value > 0.0D)))
                {
                    string selectedCulture =
                        supportedCulture.FirstOrDefault(e => !acceptedLanguage.Any(
                            ee =>
                            ee.Value.Equals(e, StringComparison.OrdinalIgnoreCase) && ee.Quality.HasValue &&
                            ee.Quality.Value == 0.0D));
                    if (!string.IsNullOrWhiteSpace(selectedCulture))
                    {
                        Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo(preferredLanguage.Value);
                        // 如需要，此处也可同时设置CurrentCulture属性
                        Thread.CurrentThread.CurrentUICulture = CultureInfo.GetCultureInfo(selectedCulture);
                    }
                }
            }
            return base.SendAsync(request, cancellationToken);
        }
    }

WebApiConfig

config.MessageHandlers.Add(new CultureHandler());

 引用resource资源文件

Resources.Language.User_name_or_password_wrong

为了调试，我们使用Fiddler来进行，运行项目之后，我们通过设置HTTP请求头信息中的Accept-Lanuage，可以得到不同语言的响应。