How do you modify the Json serialization of just one field using Json.net?

Question

Say for example I\'m trying to convert an object with 10 fields to Json, however I need to modify the process of serializing 1 of these fields. At the moment, I\'d have to use m

Answer 1

You might use System.Reflection, however it's slow but you don't have to modify the class

public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
    writer.WriteStartObject();

    Type vType = value.GetType();
    MemberInfo[] properties = vType.GetProperties(BindingFlags.Public
                                        | BindingFlags.Instance);

    foreach (PropertyInfo property in properties)
    {
        object serValue = null;
        if (property.Name == "Field4")
        {
            serValue = Convert.ToInt32(property.GetValue(value, null));
        }
        else
        {
            serValue = property.GetValue(value, null);
        }
        writer.WritePropertyName(property.Name);
        serializer.Serialize(writer, serValue);
    }

    writer.WriteEndObject();
}