Convert ArcGIS DateTime #datetime #CSharp

gistfile1.cs

using System;

namespace Strategis.Server.SpatialProcessor.DataInterop.ArcGis
{
    public static class ArcGisDateTimeHelper
    {
        /**********************************************************************************/
        // Declarations
        /**********************************************************************************/

        private static readonly DateTime DateTimeBase = new DateTime(1970, 1, 1, 0, 0, 0, 0);

        /**********************************************************************************/
        // Functions
        /**********************************************************************************/

        public static Int64? DateTimeToUnixTime(DateTime? dateTime)
        {
            if (dateTime == null || dateTime.Value < DateTimeBase)
            {
                return null;
            }

            TimeSpan span = dateTime.Value.ToLocalTime() - DateTimeBase;
            return Math.Max((Int64)span.TotalMilliseconds, 0);
        }

        /**********************************************************************************/

        public static DateTime UnixTimeToDateTime(Int64 unixTime)
        {
            if (unixTime == 0)
            {
                return DateTime.MinValue;
            }

            return DateTimeBase.AddMilliseconds(unixTime).ToLocalTime();
        }

        /**********************************************************************************/

    }
}