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CSharp · Console

/Program.cs

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;
		}
	}