public static int GetWeekOfDay(DateTime start, DateTime end)

        {

            //总周数

            var weekCount = Math.Ceiling(Convert.ToDouble((end - start).Days / ));

            //用于存储日期

            var weekDic = new Dictionary<DateTime, int>();

            var today = Convert.ToDateTime(DateTime.Now.ToString("yyyy-MM-dd"));

            for (var i = ; i < weekCount; i++)

            {

                for (var j = ; j < ; j++)

                {

                    weekDic.Add(start.AddDays(i *  + j), i + );

                }

            }

            return weekDic.ContainsKey(today) ? weekDic[today] : ;

        }