JSON deserialize to constructed protected setter array

Question

I use Newtonsoft JSON to serialize/deserialize my objects. One of those contains an array with a protected setter because the constructor build the array itself and only the

Answer 1

Try this:

var contractResolver = new DefaultContractResolver();
contractResolver.DefaultMembersSearchFlags |= BindingFlags.NonPublic;
Engine r = JsonConvert.DeserializeObject<Engine>(json), new JsonSerializerSettings
            {
                ContractResolver = contractResolver
            });

Using above-mentioned code you will get the follwoing Warning message:

'DefaultContractResolver.DefaultMembersSearchFlags' is obsolete: 'DefaultMembersSearchFlags is obsolete. To modify the members serialized inherit from DefaultContractResolver and override the GetSerializableMembers method instead.'

To solve it you can use the following solution instead:

Create a class that inherits from DefaultContractResolver to get the non public properties:

public class CustomContractResolver : DefaultContractResolver
    {
        protected override JsonProperty CreateProperty(
            MemberInfo member,
            MemberSerialization memberSerialization)
        {
            var prop = base.CreateProperty(member, memberSerialization);

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

            return prop;
        }
    }

And finally use it as follow:

var contractResolver = new CustomContractResolver();
Engine r = JsonConvert.DeserializeObject<Engine>(json), new JsonSerializerSettings
            {
                ContractResolver = contractResolver
            });

Answer 2

Mark Outs with the [JsonProperty] attribute:

    private class Engine
    {
        public string Text { get; set; }
        public int Id { get; set; }
        [JsonProperty]  // Causes the protected setter to be called on deserialization.
        public Coords[] Outs { get; protected set; }

        public Engine()
        {
            this.Outs = new Coords[3];
            for (int i = 0; i < this.Outs.Length; i++)
            {
                this.Outs[i] = new Coords();
            }
        }
    }