在Json.NET中的每个树节点序列化之前和之后的自定义代码

using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

public class CustomConverter : JsonConverter
{
    public override bool CanConvert(Type objectType)
    {
        // 指定我们要进行自定义处理的对象类型
        return objectType == typeof(MyObject);
    }

    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    {
        // 在对象序列化为JSON字符串之前执行自定义代码
        MyObject myObject = (MyObject)value;

        // 添加额外的字段
        JObject jsonObject = new JObject();
        jsonObject.Add("property1", myObject.Property1);
        jsonObject.Add("property2", myObject.Property2);

        jsonObject.WriteTo(writer);
    }

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
        // 将JSON字符串转换回对象时执行自定义代码
        JObject jsonObject = JObject.Load(reader);

        // 从JSON中读取字段，并创建对象
        MyObject myObject = new MyObject();
        myObject.Property1 = jsonObject["property1"].Value<string>();
        myObject.Property2 = jsonObject["property2"].Value<int>();

        return myObject;
    }
}

public class MyObject
{
    public string Property1 { get; set; }
    public int Property2 { get; set; }
}

JsonSerializerSettings settings = new JsonSerializerSettings();
settings.Converters.Add(new CustomConverter());

string json = JsonConvert.SerializeObject(myObject, settings);

MyObject deserializedObject = JsonConvert.DeserializeObject<MyObject>(json, settings);