C# 时间对比

        public bool IfTime(string StartTime, string EndTime)

        {

            DateTime dt1 = Convert.ToDateTime(StartTime);

            DateTime dt2 = Convert.ToDateTime(EndTime);

            if (DateTime.Compare(dt1, dt2) < )

            {

                //开始时间 < 结束时间 (执行以下语句),,说明开始时间晚

                return true;

            }

            return false;

        }

starttime= DateTime.Now.ToShortTimeString().ToString();

public int Time_Minute_diff(string StartTime, string EndTime)
{
DateTime dt1 = Convert.ToDateTime(StartTime);
DateTime dt2 = Convert.ToDateTime(EndTime);
return dt1.Minute - dt2.Minute;
}

 /// <summary>

        /// 获得固定年月日,时和分不固定 : 2019-01-01 00:00:00

        /// </summary>

        /// <returns></returns>

        public DateTime GetFixedDateTime()

        {

            string time1 = DateTime.Now.ToShortTimeString(); //16:50

            //yyyy-MM-dd hh:mm:ss //2019-01-01 16:34:00

            string Ymd = "2019-01-01 ";

            string Hour = DateTime.Now.Hour.ToString();

            string Minute = DateTime.Now.Minute.ToString();

            return Convert.ToDateTime(Ymd + Hour + ":" + Minute + ":" + 00);

        }

        /// <summary>

        /// 获得固定年月日,时和分不固定 : 2019-01-01 00:00:00

        /// </summary>

        /// <returns></returns>

        public DateTime GetFixedDateTime(string Hour = "", string Minute = "")

        {

            string time1 = DateTime.Now.ToShortTimeString(); //16:50

            //yyyy-MM-dd hh:mm:ss //2019-01-01 16:34:00

            string Ymd = "2019-01-01 ";

            if (Hour == "")

            {

                Hour = DateTime.Now.Hour.ToString();

                Minute = DateTime.Now.Minute.ToString();

            }

            return Convert.ToDateTime(Ymd + Hour + ":" + Minute + ":" + 00);

        }

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C# 时间对比

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