//统计上一小时的数据
int currentHour = DateTime.Now.Hour;
DateTime preHourStartTime = DateTime.Now.Date.AddHours(currentHour - 1);
DateTime preHourEndTime = DateTime.Now.Date.AddHours(currentHour);
//统计昨天的数据
DateTime preDayStartTime = DateTime.Now.Date.AddDays(-1);
DateTime preDayEndTime = DateTime.Now.Date;
//上个月的第一天
DateTime preMonthFistDay = DateTime.Now.Date.AddDays(1 - DateTime.Now.Day).AddMonths(-1);
//上个月的最后一天
DateTime preMonthLastDay = DateTime.Now.Date.AddDays(- DateTime.Now.Day);
转载于:https://my.oschina.net/lnucel/blog/596727