取得各年度週數清單

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/// <summary> /// 取得該年度週數清單，Key:W601, Value:2015/12/27 ~ 2016/01/02 /// </summary> /// <param name="Year"></param> /// <returns></returns> public List<KeyValuePair<string,string>> WeekList(int Year) // 開始時間 { DateTime dt1 = new DateTime(Year, 1, 1); int week = (int)dt1.DayOfWeek; List<KeyValuePair<string, string>> list = new List<KeyValuePair<string, string>>(); Calendar cal = DateTimeFormatInfo.CurrentInfo.Calendar; dt1 = dt1.AddDays(week * -1); int nweek; StringBuilder sb = new StringBuilder(); while (dt1.Year <= Year) { if (dt1.Year < Year) { list.Add(new KeyValuePair<string,string>("W" + Year % 10 + "01" , dt1.ToString("yyyy/MM/dd" + " ~ " + dt1.AddDays(6).ToString("yyyy/MM/dd")))); } else { nweek = cal.GetWeekOfYear(dt1, CalendarWeekRule.FirstDay, DayOfWeek.Sunday); list.Add(new KeyValuePair<string,string>("W" + dt1.Year % 10 + nweek.ToString("00") , dt1.ToString("yyyy/MM/dd" + " ~ " + dt1.AddDays(6).ToString("yyyy/MM/dd")))); } dt1 = dt1.AddDays(7); } return list; }