Gino的筆記本

最近在寫報表的東西,在網路上看到取得目前的日期是第幾週和該年有幾週的函數

首先要 using System.Globalization;

        //取得目前週數
        public int GetWeekOfYear(DateTime dt)
        {
            GregorianCalendar GetWeek= new GregorianCalendar();
            return GetWeek.GetWeekOfYear(dt, CalendarWeekRule.FirstDay, DayOfWeek.Monday);
        }

        //取得該年有多少週
        public int GetWeekAmount(int year)
        {
            DateTime end = new DateTime(year, 12, 31);  //該年最後一天
            System.Globalization.GregorianCalendar gc = new GregorianCalendar();
            return gc.GetWeekOfYear(end, CalendarWeekRule.FirstDay, DayOfWeek.Monday);  //該年的週數
        }