public static long GetDateLong(object time)

        {

            DateTime epoc = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(, , ));

            TimeSpan delta = new TimeSpan();

            if (time is DateTime)

                delta = ((DateTime)time).Subtract(epoc);

            else if (time is string)

                delta = DateTime.Parse(time.ToString()).Subtract(epoc);

            else

                throw new ArgumentOutOfRangeException("时间格式错误.1");

            if (delta.TotalMilliseconds < )

                throw new ArgumentOutOfRangeException("时间格式错误.2");

            long ticks = (long)delta.TotalMilliseconds;

            return ticks;

        }

public static DateTime GetDateFromLong(long ticks)

        {

            var date = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(, , ));

            date = date.AddMilliseconds(ticks);

            return date;

        }

DateTime epoc = new DateTime(, , );