public static DateTime WeekStartTime
        {
            get
            {
                DateTime dt = DateTime.Now;
                int dayOfWeek = -1 * (int)dt.Date.DayOfWeek;
//Sunday = 0,Monday = 1,Tuesday = 2,1);//取本周一

) //如果今天是周日，则开始时间是上周一
                {
                    weekStartTime = weekStartTime.AddDays(-7);
                }

                return weekStartTime.Date;
            }
        }

        public static DateTime WeekEndTime
        {
            get
            {
                return WeekStartTime.AddDays(7);
            }
        }