AcDateTime.cs

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using System;
using System.Globalization;

namespace AcUtils
{
    [Serializable]
    public static class AcDateTime
    {
        #region class variables
        private static CultureInfo _ci;
        #endregion

        static AcDateTime()
        {
            _ci = new CultureInfo("en-US");
        }


        public static string DateTime2AcDate(DateTime? dt)
        {
            string val = (dt == null) ? String.Empty :
                dt.Value.ToString("yyyy\\/MM\\/dd HH\\:mm\\:ss", CultureInfo.InvariantCulture);
            return val;
        }


        public static DateTime? AcDate2DateTime(long seconds)
        {
            DateTime? dt = null;
            try
            {
                if (seconds > 0)
                {
                    DateTimeOffset dto = DateTimeOffset.FromUnixTimeSeconds(seconds);
                    dt = dto.DateTime.ToLocalTime();
                }
            }

            catch (ArgumentOutOfRangeException ecx)
            {
                AcDebug.Log($"ArgumentOutOfRangeException caught and logged in AcDateTime.AcDate2DateTime{Environment.NewLine}{ecx.Message}");
            }

            return dt;
        }

        public static DateTime? AcDate2DateTime(string seconds)
        {
            long val;
            bool result = long.TryParse(seconds, out val);
            return (result) ? AcDate2DateTime(val) : null;
        }


        public static bool AcDateValid(string dt)
        {
            DateTime temp;
            return DateTime.TryParseExact(dt, "yyyy\\/MM\\/dd HH\\:mm\\:ss", _ci, DateTimeStyles.None, out temp);
        }
    }
}