时间戳与标准时间的相互转换

//计算两个时间戳相差的时间差

public static TimeSpan GetTimeSpan(long timestamp1,long timestamp2) {

    TimeSpan ts = new TimeSpan((timestamp1 - timestamp2) * 10000000);

     return ts;

 } 

//将时间戳转换为日期

private static DateTime ConvertTimestampToDateTime(long timestamp)    { 

    TimeSpan ts = new TimeSpan(timestamp * 10000000);

     return TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1)).Add(ts);

}

//将时间转换为时间戳

    private static long ConvertDateTimeToTimestamp(System.DateTime time)    {

    return (long)(time - System.TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1))).TotalSeconds; 

 }