每种类型的自定义 Json.NET 序列化程序设置

Question

我正在使用 ApiController，它使用全局 HttpConfiguration 类来指定 JsonFormatter 设置。我可以很容易地全局设置序列化设置如下：

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

问题是并非所有设置都适用于我项目中的所有类型。我想为执行多态序列化的特定类型指定自定义 TypeNameHandling 和 Binder 选项。

如何按类型或至少按 ApiController 指定 JsonFormatter.SerializationSettings？

Answer 1

根据您上面的评论，以下是每个控制器配置的示例：

[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);
    }
}