c# TimeSpan

转自：http://blog.163.com/y_p_xu/blog/static/17085710220116472030543/

/// <summary>
        /// 将时间“00:00:00”转化为单位为秒的数值
        /// </summary>
        /// <param name="time">形式为"00:00:00"的时间字符串</param>
        /// <returns>秒数</returns>
        public static int ConvertTimeToSecond(string time)
        {
            string[] strSplits = time.Split(':');
            if (strSplits.Length != 3)
                return -1;//非法时间格式

try
            {
                TimeSpan span = new TimeSpan(int.Parse(strSplits[0]), int.Parse(strSplits[1]), int.Parse(strSplits[2]));
                return (int)(span.Ticks / (1000 * 10000));
            }
            catch
            {
                return -1;
            }

}

/// <summary>
        /// 将单位为秒的数值转化为“00:00:00”时间格式
        /// </summary>
        /// <param name="seconds">秒数</param>
        /// <returns>形式为"00:00:00"的时间字符串</returns>
        public static string ConvertSecondToTime(int seconds)
        {
            int h = seconds / 3600;
            int m = (seconds - 3600 * h) / 60;
            int s = (seconds - 3600 * h) % 60;

string len = h.ToString().PadLeft(2, '0') + ":" + m.ToString().PadLeft(2, '0') + ":" + s.ToString().PadLeft(2, '0');

return len;
        }