new System.Globalization.GregorianCalendar().GetWeekOfYear(dt,System.Globalization.CalendarWeekRule.FirstDay, DayOfWeek.Sunday);
以周日为第一天,得到DT的WEEK.
new System.Globalization.GregorianCalendar().GetWeekOfYear(dt,System.Globalization.CalendarWeekRule.FirstDay, DayOfWeek.Sunday);
以周日为第一天,得到DT的WEEK.