Json.net serialize specific private field

Question

I have the following class:

public class TriGrid {     private List<HexTile> _hexes;     //other private fields...     //other public proprerties } 

My goal is to serialize only the _hexes field, so I created the following ContractResolver:

internal class TriGridContractResolver : DefaultContractResolver {     protected override List<MemberInfo> GetSerializableMembers(Type objectType)     {         return new List<MemberInfo> { objectType.GetMember("_hexes", BindingFlags.NonPublic | BindingFlags.Instance)[0] };     } } 

and when I want to serialize an instance of TriGrid I do:

var settings = new JsonSerializerSettings() {     ContractResolver = new TriGridContractResolver() }; var json = JsonConvert.SerializeObject(someTriGrid, settings); string strintJson = json.ToString(); 

but when I check the value of strintJson is always "{}". The _hexes has elements, it is not empty. If I serialize one particular HexTile it works as expected. What I am doing wrong here?

Answer 1

There is no need to implement a custom DefaultContractResolver. The solution is to put [JsonProperty] on _hexes and [JsonIgnore] on all the other properties and fields.