C#时间判断的循环刻度判断

//查询当天之前的时间
                        if (SelectTime.Date < DateTime.Now.Date)
                        {
                            if (startTime < SetStartTime)
                            {
                                jslist.Add(new Class技术员状态(color延迟出发, SetStartTime, SetEndTime));
                            }
                            if (startTime > SetStartTime)
                            {
                                jslist.Add(new Class技术员状态(color延迟出发, startTime, SetEndTime));
                            }
                        }
                        //查询当天的时间
                        if (SelectTime.Date == DateTime.Now.Date)
                        {
                            //预计开始时间在之前，预计结束时间在当天
                            if (startTime.Date < SetStartTime.Date && endTime.Date == SetStartTime.Date)
                            {
                                //还没到预计结束时间
                                if (SelectTime <= endTime)
                                {
                                    jslist.Add(new Class技术员状态(color排班, SetStartTime, SelectTime));
                                    jslist.Add(new Class技术员状态(color延迟出发, SelectTime, endTime));
                                }
                                //预计时间已过
                                if (SelectTime > endTime)
                                {
                                    jslist.Add(new Class技术员状态(color延迟出发, SetStartTime, SelectTime));
                                }
                            }
                            //预计开始和预计结束时间在当天
                            if (startTime.Date == SelectTime.Date && endTime.Date == SelectTime.Date)
                            {
                                if (SelectTime < startTime)
                                {
                                    jslist.Add(new Class技术员状态(color排班, startTime, endTime));
                                }
                                if (SelectTime > startTime && SelectTime <= endTime)
                                {
                                    jslist.Add(new Class技术员状态(color延迟出发, startTime, SelectTime));
                                    jslist.Add(new Class技术员状态(color排班, SelectTime, endTime));
                                }
                                if (SelectTime > endTime)
                                {
                                    jslist.Add(new Class技术员状态(color延迟出发, startTime, SelectTime));
                                }
                            }
                            //预计开始时间在当天，预计结束时间在之后
                            if (startTime.Date == SetStartTime.Date && endTime.Date > SetStartTime.Date)
                            {
                                if (DateTime.Now < startTime)
                                {
                                    jslist.Add(new Class技术员状态(color延迟出发, startTime, SetEndTime));
                                }
                                if (DateTime.Now > startTime)
                                {
                                    jslist.Add(new Class技术员状态(color延迟出发, startTime, DateTime.Now));
                                    jslist.Add(new Class技术员状态(color排班, DateTime.Now, SetEndTime));
                                }
                            }
                            jslist.Add(new Class技术员状态(color延迟出发, startTime, endTime));
                        }
                        //查询当天之后的时间
                        if (SelectTime.Date > DateTime.Now.Date)
                        {
                            if (startTime < SetStartTime && endTime < SetEndTime)
                            {
                                jslist.Add(new Class技术员状态(color排班, SetStartTime, endTime));
                            }
                            if (startTime > SetStartTime && endTime < SetEndTime)
                            {
                                jslist.Add(new Class技术员状态(color排班, startTime, endTime));
                            }
                            if (startTime > SetStartTime && endTime > SetEndTime)
                            {
                                jslist.Add(new Class技术员状态(color排班, startTime, SetEndTime));
                            }
                        }