C# 时间间隔与时间相加

一、时间间隔  

         /// <summary> 时间间隔 </summary>
        /// <param name="DateTime1">第一个日期和时间</param>
        /// <param name="DateTime2">第二个日期和时间</param>
        /// <returns>同一天的相隔的分钟的整数部分</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() + "小时"
                //        + ts.Minutes.ToString() + "分钟"
                //        + ts.Seconds.ToString() + "秒";
                return Convert.ToInt32(ts.TotalMinutes);
        }

二、与当前时间差几秒

　　DateTime dt1 = DateTime.Now;

　　DateTime dt2=DateTime.Now;

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

      Double douLen = ts.TotalSeconds;

三、时间相加

　　   /// <summary>时间相加</summary>
        /// <param name="DateTime1"></param>
        /// <param name="DateTime2"></param>
        /// <returns>时间和</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;
        }