C# 如何修复此webapi路由配置？

我在WebApiConfig.cs中编写了这段代码，它的行为与预期不符。例如：json的驼峰式大小写，不包括空值的属性

我需要在下面的代码片段中找到任何缺失或不正确的代码

这是一个带有WebApiConfig.cs的web应用程序，我正在尝试配置它 json的驼峰式大小写，并从响应中排除空值的属性

当前，响应对象没有json的驼峰式大小写，并且包含具有空值的属性

public static void Register(HttpConfiguration config)
    {
        config.MapHttpAttributeRoutes();
        var jsonFormatter = GlobalConfiguration.Configuration.Formatters.JsonFormatter;

        jsonFormatter.SerializerSettings.Formatting = Formatting.Indented;
        jsonFormatter.SerializerSettings.Converters.Add(new Newtonsoft.Json.Converters.StringEnumConverter());
        jsonFormatter.SerializerSettings.NullValueHandling = NullValueHandling.Ignore;
        jsonFormatter.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();

        config.Formatters.Add(jsonFormatter);
        config.Formatters.Remove(config.Formatters.XmlFormatter);

        config.Routes.MapHttpRoute(
           name: "DefaultApi",
           routeTemplate: "api/{controller}/{id}",
           defaults: new { id = RouteParameter.Optional }
       );
    }

提前谢谢你的帮助

使用传递到Register方法中的HttpConfiguration

public static void Register(HttpConfiguration config)
{
    config.MapHttpAttributeRoutes();

    config.Formatters.Remove(config.Formatters.XmlFormatter); 
    var jsonFormatter = config.Formatters.JsonFormatter;

    jsonFormatter.SerializerSettings.Formatting = Formatting.Indented;
    jsonFormatter.SerializerSettings.Converters.Add(new Newtonsoft.Json.Converters.StringEnumConverter());
    jsonFormatter.SerializerSettings.NullValueHandling = NullValueHandling.Ignore;
    jsonFormatter.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();

    config.Routes.MapHttpRoute(
       name: "DefaultApi",
       routeTemplate: "api/{controller}/{id}",
       defaults: new { id = RouteParameter.Optional }
   );
}