C# 時間間隔與時間相加

一、時間間隔  

         /// <summary> 時間間隔 </summary>
        /// <param name="DateTime1">第一個日期和時間</param>
        /// <param name="DateTime2">第二個日期和時間</param>
        /// <returns>同一天的相隔的分鐘的整數部分</returns>
        private int DateDiff(DateTime DateTime1, DateTime DateTime2)
        {
                TimeSpan ts1 = new TimeSpan(DateTime1.Ticks);
                TimeSpan ts2 = new TimeSpan(DateTime2.Ticks);
                TimeSpan ts = ts1.Subtract(ts2).Duration();
                //dateDiff = ts.Days.ToString() + "天"
                //        + ts.Hours.ToString() + "小時"
                //        + ts.Minutes.ToString() + "分鐘"
                //        + ts.Seconds.ToString() + "秒";
                return Convert.ToInt32(ts.TotalMinutes);
        }

二、與目前時間差幾秒

　　DateTime dt1 = DateTime.Now;

　　DateTime dt2=DateTime.Now;

      TimeSpan ts = dt1.Subtract(dt2).Duration();

      Double douLen = ts.TotalSeconds;

三、時間相加

　　   /// <summary>時間相加</summary>
        /// <param name="DateTime1"></param>
        /// <param name="DateTime2"></param>
        /// <returns>時間和</returns>
        private DateTime DateSum(DateTime DateTime1,DateTime DateTime2)
        {
            DateTime1 = DateTime1.AddHours(DateTime2.Hour);
            DateTime1=DateTime1.AddMinutes(DateTime2.Minute);
            DateTime1=DateTime1.AddSeconds(DateTime2.Second);
            return DateTime1;
        }