根据日期获得第几周数据

///
/// 获取指定日期,在为一年中为第几周
///
/// 【根据日期获得第几周数据】指定时间
/// 返回第几周
private static int GetWeekOfYear(DateTime dt)
{
GregorianCalendar gc = new GregorianCalendar();
int weekOfYear = gc.GetWeekOfYear(dt,CalendarWeekRule.FirstDay, DayOfWeek.Monday);
return weekOfYear;
}

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