How can I customize Json.NET to serialize private members and NOT serialize public readonly properties (without using attributes).
I've had a stab around at creating a custom IContractResolver but am a bit lost.
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2 Answers
For a partial answer, messing with DefaultContractResolver.DefaultMembersSearchFlags can get it to include private things:
Newtonsoft.Json.JsonSerializerSettings jss = new Newtonsoft.Json.JsonSerializerSettings();
if (includePrivateMembers)
{
Newtonsoft.Json.Serialization.DefaultContractResolver dcr = new Newtonsoft.Json.Serialization.DefaultContractResolver();
dcr.DefaultMembersSearchFlags |= System.Reflection.BindingFlags.NonPublic;
jss.ContractResolver = dcr;
}
return Newtonsoft.Json.JsonConvert.SerializeObject(o, jss);
Seems to work on a lot of objects, though with some this seems to generate a CLR exception.
1 Comment
Mukus
Worked for me. +1. How can I now specify what properties to exclude? A regex option would be even better.
In response to Chris' answer, the DefaultMemberSearchFlags property on DefaultContractResolver was deprecated as of version 6. Despite of what the deprecation message says, I believe you'll need to overwrite the CreateProperties method, too, like L.B explains.
This method gives you full control, including excluding readonly properties:
class PrivateContractResolver : DefaultContractResolver
{
protected override List<MemberInfo> GetSerializableMembers(Type objectType)
{
var flags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic;
MemberInfo[] fields = objectType.GetFields(flags);
return fields
.Concat(objectType.GetProperties(flags).Where(propInfo => propInfo.CanWrite))
.ToList();
}
protected override IList<JsonProperty> CreateProperties(Type type, MemberSerialization memberSerialization)
{
return base.CreateProperties(type, MemberSerialization.Fields);
}
}
