using System;

using System.Collections;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Runtime.Serialization.Formatters;

using System.IO;

using System.Data;

using System.ComponentModel.DataAnnotations;

using System.Globalization;

using System.Reflection;

using System.Collections.ObjectModel;

using System.Net;

​

using Newtonsoft.Json.Linq;

using Newtonsoft.Json.Converters;

using Newtonsoft.Json.Serialization;    

​

using System.Text.Json;

​

using NUnit.Framework; // Throws NUnit.Framework.AssertionException

​

//https://stackoverflow.com/questions/68475544/select-part-of-json-with-system-text-json

​

    public static partial class JsonExtensions

    {

        // Copied from this answer https://stackoverflow.com/a/59047063/3744182

        // By https://stackoverflow.com/users/3744182/dbc

        // To https://stackoverflow.com/questions/58138793/system-text-json-jsonelement-toobject-workaround

        public static T ToObject<T>(this JsonElement element, JsonSerializerOptions options = null)

        {

            var bufferWriter = new System.Buffers.ArrayBufferWriter<byte>();

            using (var writer = new Utf8JsonWriter(bufferWriter))

                element.WriteTo(writer);

            return JsonSerializer.Deserialize<T>(bufferWriter.WrittenSpan, options);

        }

​

        public static T ToObject<T>(this JsonDocument document, JsonSerializerOptions options = null)

        {

            if (document == null)

                throw new ArgumentNullException(nameof(document));

            return document.RootElement.ToObject<T>(options);

        }       

    }

​

    public class Retailer // NOT INCLUDED IN QUESTION

    {

    }

​

    public class CarteGraphique

    {

        public string displayName { get; set; }

        public string PrdStatus { get; set; }

        public List<Retailer> retailers { get; set; }

    }

​

    class TestClass

    {

        public static void Test()

        {

            var url = @"https://api.nvidia.partners/edge/product/search?page=1&limit=9&locale=fr-fr&category=GPU&gpu=RTX%203090,RTX%203080%20Ti,RTX%203080,RTX%203070%20Ti,RTX%203070,RTX%203060%20Ti,RTX%203060&gpu_filter=RTX%203090~12,RTX%203080%20Ti~7,RTX%203080~16,RTX%203070%20Ti~3,RTX%203070~18,RTX%203060%20Ti~8,RTX%203060~2,RTX%202080%20SUPER~1,RTX%202080~0,RTX%202070%20SUPER~0,RTX%202070~0,RTX%202060~6,GTX%201660%20Ti~0,GTX%201660%20SUPER~9,GTX%201660~8,GTX%201650%20Ti~0,GTX%201650%20SUPER~3,GTX%201650~17";

            using var client = new WebClient();

            var json = client.DownloadString(url);

​

            TestSystemTextJson(json);

            TestNewtonsoft(json);

        }

        static void TestSystemTextJson(string json)

        {

            Console.WriteLine("\nParsing with System.Text.Json...");

            using var jsonParse = JsonDocument.Parse(json); // Be sure to dispose the JsonDocument!

​

            var options = new JsonSerializerOptions { PropertyNameCaseInsensitive = true };

            var products = jsonParse.RootElement

                .GetProperty("searchedProducts") // Get the searchedProducts value

                .GetProperty("productDetails")   // Get the productDetails value

                .EnumerateArray()                // Enumerate its items

                .Where(n => n.GetProperty("isFounderEdition").GetBoolean()) // Filter on those for which isFounderEdition == true

                .Select(n => n.ToObject<CarteGraphique>(options)) // Deserialize to a CarteGraphique

                .ToList();

            // Add the searchedProducts.featuredProduct item to the list.

            var featuredProduct = jsonParse.RootElement

                .GetProperty("searchedProducts")

                .GetProperty("featuredProduct")

                .ToObject<CarteGraphique>(options);

​

            products.Add(featuredProduct);

            foreach (var item in products)

            {

                Console.WriteLine(item.displayName); // Fixed DisplayName

            }

        }

        public static void TestNewtonsoft(string json)

        {

            Console.WriteLine("\nParsing with Newtonsoft...");

            JObject jsonParse = JObject.Parse(json);

​

            IList<CarteGraphique> products = new List<CarteGraphique>();

​

            IList<JToken> productDetailsParse = jsonParse["searchedProducts"]["productDetails"]

                .Children()

                .Where(n => n["isFounderEdition"].Value<bool>() == true)

                .ToList();

            var featuredProductParse = jsonParse["searchedProducts"]["featuredProduct"];

​

​

            foreach (JToken item in productDetailsParse)

            {

                CarteGraphique result = item.ToObject<CarteGraphique>();

                products.Add(result);

            }

            var featuredProduct = featuredProductParse.ToObject<CarteGraphique>();

​

            products.Add(featuredProduct);

​

​

​

            foreach (var item in products)

            {

                Console.WriteLine(item.displayName); // Fixed DisplayName

            }

        }   

    }

​

    public class Program

    {

        public static void Main()

        {

            Console.WriteLine("Environment version: {0} ({1})", System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription , GetNetCoreVersion());

            Console.WriteLine("{0} version: {1}", typeof(Newtonsoft.Json.JsonSerializer).Assembly.GetName().Name,  typeof(Newtonsoft.Json.JsonSerializer).Assembly.FullName);

            Console.WriteLine();

​

            try

            {

                TestClass.Test();

            }

            catch (Exception ex)

            {

                Console.WriteLine("Failed with unhandled exception: ");

                Console.WriteLine(ex);

                throw;

            }

        }

        public static string GetNetCoreVersion()

        {

            //https://techblog.dorogin.com/how-to-detect-net-core-version-in-runtime-ecd65ad695be

            //

            var assembly = typeof(System.Runtime.GCSettings).GetTypeInfo().Assembly;

            var assemblyPath = assembly.Location.Split(new[] { '/', '\\' }, StringSplitOptions.RemoveEmptyEntries);

            int netCoreAppIndex = Array.IndexOf(assemblyPath, "Microsoft.NETCore.App");

            if (netCoreAppIndex > 0 && netCoreAppIndex < assemblyPath.Length - 2)

                return assemblyPath[netCoreAppIndex + 1];

            return null;

        }

    }

​