根据时段改变时间段

        /// <summary>
        /// 根据时段改变时间段
        /// </summary>
        /// <param name="timeIntervalValue">时段值</param>
        /// <param name="dtpStartTime">起始时间控件</param>
        /// <param name="dtpEndTime">结束时间控件</param>
        protected void ChangeTimeRangeByTimeInterval(string timeIntervalValue, DateTimePicker dtpStartTime, DateTimePicker dtpEndTime)
        {
            DateTime dateTimeTotay = Convert.ToDateTime(DateTime.Now.ToString("yyyy-MM-dd 00:00:00"));
            DateTime tempDate;
            switch (timeIntervalValue)
            {
                case "0":
                    // 今天
                    dtpStartTime.Value = dateTimeTotay;
                    dtpEndTime.Value = dateTimeTotay.AddDays(1).AddMilliseconds(-1.0);
                    break;
                case "1":
                    // 昨天
                    tempDate = dateTimeTotay.AddDays(-1);
                    dtpStartTime.Value = tempDate;
                    dtpEndTime.Value = tempDate.AddDays(1).AddMilliseconds(-1.0);
                    break;
                case "2":
                    // 前天
                    tempDate = dateTimeTotay.AddDays(-2);
                    dtpStartTime.Value = tempDate;
                    dtpEndTime.Value = tempDate.AddDays(1).AddMilliseconds(-1.0);
                    break;
                case "3":
                    // 本周
                    int temp = (int)dateTimeTotay.DayOfWeek - 1;
                    int days = temp == -1 ? 6 : temp;
                    dtpStartTime.Value = dateTimeTotay.AddDays(-days);
                    dtpEndTime.Value = dateTimeTotay.AddDays(6 - days).AddDays(1).AddMilliseconds(-1.0);
                    break;
                case "4":
                    // 上周
                    temp = (int)dateTimeTotay.DayOfWeek - 1;
                    days = temp == -1 ? 6 : temp;
                    dtpStartTime.Value = dateTimeTotay.AddDays(-days - 7);
                    dtpEndTime.Value = dateTimeTotay.AddDays(-1 - days).AddDays(1).AddMilliseconds(-1.0);
                    break;
                case "5":
                    // 本月
                    tempDate = Convert.ToDateTime(dateTimeTotay.ToString("yyyy-MM-01 00:00:00"));
                    dtpStartTime.Value = tempDate;
                    dtpEndTime.Value = tempDate.AddMonths(1).AddDays(-1).AddDays(1).AddMilliseconds(-1.0);
                    break;
                case "6":
                    // 上月
                    tempDate = Convert.ToDateTime(dateTimeTotay.AddMonths(-1).ToString("yyyy-MM-01 00:00:00"));
                    dtpStartTime.Value = tempDate;
                    dtpEndTime.Value = tempDate.AddMonths(1).AddDays(-1).AddDays(1).AddMilliseconds(-1.0);
                    break;
                case "7":
                    // 今年
                    tempDate = Convert.ToDateTime(dateTimeTotay.ToString("yyyy-01-01 00:00:00"));
                    dtpStartTime.Value = tempDate;
                    dtpEndTime.Value = tempDate.AddYears(1).AddDays(-1).AddDays(1).AddMilliseconds(-1.0);
                    break;
                case "8":
                    // 去年
                    tempDate = Convert.ToDateTime(dateTimeTotay.AddYears(-1).ToString("yyyy-01-01 00:00:00"));
                    dtpStartTime.Value = tempDate;
                    dtpEndTime.Value = tempDate.AddYears(1).AddDays(-1).AddDays(1).AddMilliseconds(-1.0);
                    break;
                case "9":
                    // 近七天
                    tempDate = dateTimeTotay.AddDays(-6);
                    dtpStartTime.Value = tempDate;
                    dtpEndTime.Value = dateTimeTotay.AddDays(1).AddMilliseconds(-1.0);
                    break;
                case "10":
                    // 近30天
                    tempDate = dateTimeTotay.AddDays(-29);
                    dtpStartTime.Value = tempDate;
                    dtpEndTime.Value = dateTimeTotay.AddDays(1).AddMilliseconds(-1.0);
                    break;
                case "11":
                    //全部时段
                    dtpStartTime.Value = Convert.ToDateTime("1971-01-01 00:00:00");
                    dtpEndTime.Value = dateTimeTotay.AddDays(1).AddMilliseconds(-1.0);
                    break;
            }
        }