Private setters in Json.Net

Question

I know there's an attribute to handle private setters but I kind of want this behavior as a default, is there a way to accomplish this? Except tweaking the source. Would be great if there was a setting for this.

Answer 1

Updated, new answer

I've written a source distribution NuGet for this, that installs a single file with two custom contract resolvers:

• PrivateSetterContractResolver
• PrivateSetterCamelCasePropertyNamesContractResolver

Install the NuGet package:

Install-Package JsonNet.ContractResolvers

Then just use any of the resolvers:

var settings = new JsonSerializerSettings
{
    ContractResolver = new PrivateSetterContractResolver()
};

var model = JsonConvert.DeserializeObject<Model>(json, settings);

You can read about it here: http://danielwertheim.se/json-net-private-setters-nuget/

GitHub repo: https://github.com/danielwertheim/jsonnet-privatesetterscontractresolvers

Old answer (still valid)

There are two alternatives that can solve the problem.

Alt 1: On the deserializers

ContractResolver.DefaultMembersSearchFlags =
                             DefaultMembersSearchFlags | BindingFlags.NonPublic;

The default serialization option supports all types of class member. Therefore this solution will return all private members types including fields. I'm only interested in also supporting private setters.

Alt2: Create a custom ContractResolver:

Therefore this is the better options since we just check the properties.

public class SisoJsonDefaultContractResolver : DefaultContractResolver 
{
    protected override JsonProperty CreateProperty(
        MemberInfo member,
        MemberSerialization memberSerialization)
    {
        //TODO: Maybe cache
        var prop = base.CreateProperty(member, memberSerialization);

        if (!prop.Writable)
        {
            var property = member as PropertyInfo;
            if (property != null)
            {
                var hasPrivateSetter = property.GetSetMethod(true) != null;
                prop.Writable = hasPrivateSetter;
            }
        }

        return prop;
    }
}

For more information, read my post: http://danielwertheim.se/json-net-private-setters/