BeiJinSettleAccount/code/Shared/Win.Utils/DatetimeJsonConverter.cs

using System;
using System.Text.Json;
using System.Text.Json.Serialization;

namespace Win.Utils
{
    public class DatetimeJsonConverter : JsonConverter<DateTime>
    {
        public override DateTime Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
        {
            if (reader.TokenType == JsonTokenType.String)
            {
                if (DateTime.TryParse(reader.GetString(), out var date))
                {
                    return date;
                }
            }

            return reader.GetDateTime();
        }

        public override void Write(Utf8JsonWriter writer, DateTime value, JsonSerializerOptions options)
        {
            if (value.Hour == 0 && value.Minute == 0 && value.Second == 0)
            {
                writer.WriteStringValue(value.ToString("yyyy-MM-dd"));
            }
            else
            {
                writer.WriteStringValue(value.ToString("yyyy-MM-dd HH:mm:ss"));
            }

        }
    }
}