每種類型自定義Json.NET序列化程序設置

Question

我正在使用ApiController，它使用全局HttpConfiguration類來指定JsonFormatter設置。 我可以非常容易地全局設置序列化設置：

config.Formatters.JsonFormatter.SerializerSettings.PreserveReferencesHandling = PreserveReferencesHandling.Objects;

問題是並非所有設置都適用於我的項目中的所有類型。 我想為執行多態序列化的特定類型指定自定義TypeNameHandling和Binder選項。

如何在每個類型上指定JsonFormatter.SerializationSettings，或者在每個ApiController的基礎上指定最少？

Answer 1

根據您上面的評論，以下是每個控制器配置的示例：

[MyControllerConfig]
public class ValuesController : ApiController

---

[AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = true)]
public class MyControllerConfigAttribute : Attribute, IControllerConfiguration
{
    public void Initialize(HttpControllerSettings controllerSettings, HttpControllerDescriptor controllerDescriptor)
    {
        //remove the existing Json formatter as this is the global formatter and changing any setting on it
        //would effect other controllers too.
        controllerSettings.Formatters.Remove(controllerSettings.Formatters.JsonFormatter);

        JsonMediaTypeFormatter formatter = new JsonMediaTypeFormatter();
        formatter.SerializerSettings.PreserveReferencesHandling = PreserveReferencesHandling.All;
        controllerSettings.Formatters.Insert(0, formatter);
    }
}