<PackageReference Include="Newtonsoft.Json" Version="11.0.2" />

JavaScriptDateTimeConverter

Converts a DateTime to and from a JavaScript Date constructor (e.g. new Date(52231943)).
using Newtonsoft.Json.Utilities; using System; using System.Globalization; namespace Newtonsoft.Json.Converters { public class JavaScriptDateTimeConverter : DateTimeConverterBase { public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer) { long value2; object obj; if ((obj = value) is DateTime) value2 = DateTimeUtils.ConvertDateTimeToJavaScriptTicks(((DateTime)obj).ToUniversalTime()); else { if (!((obj = value) is DateTimeOffset)) throw new JsonSerializationException("Expected date object value."); value2 = DateTimeUtils.ConvertDateTimeToJavaScriptTicks(((DateTimeOffset)obj).ToUniversalTime().UtcDateTime); } writer.WriteStartConstructor("Date"); writer.WriteValue(value2); writer.WriteEndConstructor(); } public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer) { if (reader.TokenType == JsonToken.Null) { if (!ReflectionUtils.IsNullable(objectType)) throw JsonSerializationException.Create(reader, "Cannot convert null value to {0}.".FormatWith(CultureInfo.InvariantCulture, objectType)); return null; } if (reader.TokenType != JsonToken.StartConstructor || !string.Equals(reader.Value.ToString(), "Date", StringComparison.Ordinal)) throw JsonSerializationException.Create(reader, "Unexpected token or value when parsing date. Token: {0}, Value: {1}".FormatWith(CultureInfo.InvariantCulture, reader.TokenType, reader.Value)); reader.Read(); if (reader.TokenType != JsonToken.Integer) throw JsonSerializationException.Create(reader, "Unexpected token parsing date. Expected Integer, got {0}.".FormatWith(CultureInfo.InvariantCulture, reader.TokenType)); DateTime dateTime = DateTimeUtils.ConvertJavaScriptTicksToDateTime((long)reader.Value); reader.Read(); if (reader.TokenType != JsonToken.EndConstructor) throw JsonSerializationException.Create(reader, "Unexpected token parsing date. Expected EndConstructor, got {0}.".FormatWith(CultureInfo.InvariantCulture, reader.TokenType)); if ((ReflectionUtils.IsNullableType(objectType) ? Nullable.GetUnderlyingType(objectType) : objectType) == typeof(DateTimeOffset)) return new DateTimeOffset(dateTime); return dateTime; } } }