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;

​

using System.Text.Json;

using System.Text.Json.Serialization;

​

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

​

//https://stackoverflow.com/questions/66014283/partial-deserialization-web-api-core-controller

​

    public class CustomDateTimeConverter : JsonConverter<DateTime?>

    {

        //const string Format = "Tue, 02 Feb 2021 18:07:33 GMT";

        const string Format = "dddd, dd MMM yyyy hh:mm:ss";

        // Adapted from https://docs.microsoft.com/en-us/dotnet/standard/datetime/system-text-json-support#using-datetimeoffsetparse-and-datetimeoffsettostring

        public override DateTime? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) =>

            DateTime.Parse(reader.GetString(), CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal);

​

        public override void Write(Utf8JsonWriter writer, DateTime? value, JsonSerializerOptions options) =>

            writer.WriteStringValue(value?.ToUniversalTime().ToString(Format, CultureInfo.InvariantCulture)+" GMT");

    }

​

    public class FilingSearchCriteria

    {

        public int? FilerId { get; set; }

        public int? TypeId { get; set; }

        [JsonConverter(typeof(CustomDateTimeConverter))]

        public DateTime? StartDate { get; set; }

        [JsonConverter(typeof(CustomDateTimeConverter))]

        public DateTime? EndDate { get; set; }

        public bool? Legacy { get; set; }

        public bool? NoAtttachments { get; set; }

        public bool? MissingFields { get; set; }

        public bool? MissingAttachments { get; set; }

        public string DocketNumber { get; set; }

​

    }

​

    class TestClass

    {

        public static void Test()

        {

            var options = new JsonSerializerOptions

            {

                //Converters = { new CustomDateTimeConverter() },

                WriteIndented = true,

                IgnoreNullValues = true,

            };

            var model = JsonSerializer.Deserialize<FilingSearchCriteria>(

                @"{""EndDate"":""Tue, 02 Feb 2021 18:07:33 GMT"",""StartDate"":""Tue, 26 Jan 2021 18:07:33 GMT""}",

                options);

            Console.WriteLine(JsonSerializer.Serialize(model.EndDate));

            Console.WriteLine(JsonSerializer.Serialize(model.StartDate));

            //model.Dump();

            Console.WriteLine(JsonSerializer.Serialize(model, options));

        }   

    }

​

    public class Program

    {

        public static void Main()

        {

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

            Console.WriteLine("System.Text.Json version: " + typeof(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;

        }

    }

​