using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Diagnostics;

using System.IO;

using System.Collections.ObjectModel;

using System.Reflection;

​

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using Newtonsoft.Json.Converters;

using Newtonsoft.Json.Serialization;

​

​

    public class Param

    {

        public string camera_clock { get; set; }

        public string video_standard { get; set; }

        public string app_status { get; set; }

        public string stream_out_type { get; set; }

        public string save_low_resolution_clip { get; set; }

        public string video_resolution { get; set; }

        public string video_stamp { get; set; }

        public string video_quality { get; set; }

        public string timelapse_video { get; set; }

        public string photo_size { get; set; }

        public string photo_stamp { get; set; }

        public string photo_quality { get; set; }

        public string timelapse_photo { get; set; }

        public string selfie_photo { get; set; }

        public string burst_photo { get; set; }

        public string autoshoot_photo { get; set; }

        public string loop_record { get; set; }

        public string motion_detec_video { get; set; }

        public string status_led_switch { get; set; }

        public string wifi_led_switch { get; set; }

        public string osd_switch { get; set; }

        public string cardvr_switch { get; set; }

        public string delay_pwroff { get; set; }

        public string rotate_image { get; set; }

        public string mic_vol { get; set; }

        public string language { get; set; }

        public string date_disp_fmt { get; set; }

        public string auto_bkl_off { get; set; }

        public string auto_pwr_off { get; set; }

        public string light_freq { get; set; }

        public string meter_mode { get; set; }

        public string buzzer { get; set; }

    }

​

    public class RootObject

    {

        public int rval { get; set; }

        public int msg_id { get; set; }

        public Param param { get; set; }

    }

​

    public class ArrayToObjectConverter<T> : JsonConverter

    {

        public override bool CanConvert(Type objectType)

        {

            return typeof(T).IsAssignableFrom(objectType);

        }

​

        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)

        {

            if (reader.TokenType == JsonToken.Null)

                return null;

​

            if (existingValue == null)

            {

                var contract = serializer.ContractResolver.ResolveContract(objectType);

                existingValue = contract.DefaultCreator();

            }

​

            switch (reader.TokenType)

            {

                case JsonToken.StartArray:

                    {

                        var jArray = JArray.Load(reader);

​

                        var jObj = new JObject();

                        foreach (var prop in jArray.OfType<JObject>().SelectMany(o => o.Properties()))

                            jObj.Add(prop);

​

                        using (var sr = jObj.CreateReader())

                        {

                            serializer.Populate(sr, existingValue);

                        }

                    }

                    break;

​

                case JsonToken.StartObject:

                    serializer.Populate(reader, existingValue);

                    break;

​

                default:

                    var msg = "Unexpected token type " + reader.TokenType.ToString();

                    Debug.WriteLine(msg);

                    throw new JsonSerializationException(msg);

            }

​

            return existingValue;

        }

​

        public override bool CanWrite { get { return false; } }

​

        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)

        {

            throw new NotImplementedException();

        }

    }

​

    public class TestClass

    {

        static string GetJson()

        {

            var json = @"{

""rval"": 0,

""msg_id"": 3,

""param"": [{

    ""camera_clock"": ""2015-09-03 04:42:20""

}, {

    ""video_standard"": ""NTSC""

}, {

    ""app_status"": ""idle""

}, {

    ""stream_out_type"": ""rtsp""

}, {

    ""save_low_resolution_clip"": ""off""

}, {

    ""video_resolution"": ""1920x1080 60P 16:9""

}, {

    ""video_stamp"": ""off""

}, {

    ""video_quality"": ""S.Fine""

}, {

    ""timelapse_video"": ""off""

}, {

    ""photo_size"": ""16M (4608x3456 4:3)""

}, {

    ""photo_stamp"": ""off""

}, {

    ""photo_quality"": ""S.Fine""

}, {

    ""timelapse_photo"": ""off""

}, {

    ""selfie_photo"": ""off""

}, {

    ""burst_photo"": ""off""

}, {

    ""autoshoot_photo"": ""off""

}, {

    ""loop_record"": ""off""

}, {

    ""motion_detec_video"": ""off""

}, {

    ""status_led_switch"": ""off""

}, {

    ""wifi_led_switch"": ""on""

}, {

    ""osd_switch"": ""on""

}, {

    ""cardvr_switch"": ""off""

}, {

    ""delay_pwroff"": ""off""

}, {

    ""rotate_image"": ""normal""

}, {

    ""mic_vol"": ""4""

}, {

    ""language"": ""en""

}, {

    ""date_disp_fmt"": ""ymd""

}, {

    ""auto_bkl_off"": ""60""

}, {

    ""auto_pwr_off"": ""180""

}, {

    ""light_freq"": ""60hz""

}, {

    ""meter_mode"": ""60hz""

}, {

    ""buzzer"": ""on""

}]}";

            return json;

        }

​

        public static void Test()

        {

            var json = GetJson();

            var settings = new JsonSerializerSettings { Converters = new[] { new ArrayToObjectConverter<Param>() } };

​

            var root = JsonConvert.DeserializeObject<RootObject>(json, settings);

​

            var json2 = JsonConvert.SerializeObject(root, Formatting.Indented, settings);

​

            ConsoleAndDebug.WriteLine("Json deserialized successfully.  Re-serialized JSON: ");

            ConsoleAndDebug.WriteLine(json2);

            if (root.param == null 

                || root.param.video_standard != "NTSC"

                || root.msg_id != 3)

            {

                throw new InvalidOperationException("incorrect deserialized values");

            }

            ConsoleAndDebug.WriteLine("Initial Json: ");

            ConsoleAndDebug.WriteLine(JToken.Parse(json));

​

        }

    }

​

    public static class ConsoleAndDebug

    {

        public static void WriteLine(object s)

        {

            Console.WriteLine(s);

            Debug.WriteLine(s);

        }

    }

    public class Program

    {

        public static void Main()

        {

            ConsoleAndDebug.WriteLine("Json.NET version: " + typeof(JsonSerializer).Assembly.FullName);

            TestClass.Test();

        }

    }

​