#region 根据年月获取每周起止时间 public string RegexDay(string time) { Regex r = new Regex("-"); // Split on hyphens. string[] s = r.Split(time); return s[s.Length - 1].ToString(); } public string GetWeekRange(System.DateTime dt) { int weeknow = Convert.ToInt32(dt.DayOfWeek); int daydiff = (-1) * weeknow; int dayadd = 6 - weeknow; string dateBegin = dt.AddDays(daydiff).Date.ToString("yyyy-mm-dd"); string dateEnd = dt.AddDays(dayadd).Date.ToString("yyyy-mm-dd"); return dateBegin + " - " + dateEnd; } public void GetDay(int year, int month, ref string[] weekrangeStart, ref string[] weekrangeEnd) { //第一周 string firstdayofmonth = year + "-" + month + "-1"; weekrangeStart[0]=firstdayofmonth; firstdayofmonth = GetWeekRange(Convert.ToDateTime(firstdayofmonth)); int firstweeklastday = Convert.ToInt32(RegexDay(firstdayofmonth)); weekrangeEnd[0] = year + "-" + month + "-" + firstweeklastday; //第二周 weekrangeStart[1] = (Convert.ToDateTime(weekrangeEnd[0])).AddDays(1).Date.ToString("yyyy-MM-dd"); weekrangeEnd[1] = (Convert.ToDateTime(weekrangeStart[1])).AddDays(7 - 1).Date.ToString("yyyy-MM-dd"); //第三周 weekrangeStart[2] = (Convert.ToDateTime(weekrangeEnd[1])).AddDays(1).Date.ToString("yyyy-MM-dd"); weekrangeEnd[2] = (Convert.ToDateTime(weekrangeStart[2])).AddDays(7 - 1).Date.ToString("yyyy-MM-dd"); //第四周 weekrangeStart[3] = (Convert.ToDateTime(weekrangeEnd[2])).AddDays(1).Date.ToString("yyyy-MM-dd"); weekrangeEnd[3] = (Convert.ToDateTime(weekrangeStart[3])).AddDays(7 - 1).Date.ToString("yyyy-MM-dd"); //第五周 weekrangeStart[4] = (Convert.ToDateTime(weekrangeEnd[3])).AddDays(1).Date.ToString("yyyy-MM-dd"); weekrangeEnd[4] = (Convert.ToDateTime(weekrangeStart[4])).AddDays(7 - 1).Date.ToString("yyyy-MM-dd"); } #endregion