C#中獲取日期所對應的星期。下面的函數就是用來處理傳遞過來的日期所對應的星期幾。這在C#中相對較容易些，因為C#的DateTime類中有一個屬性DayOfWeek專門用來獲取某個日期所對應的星期的，只要將其轉換成相應的數字就可以了，具體源代碼如下

        /// <summary>
        /// 獲取日期對應的星期
        /// </summary>
        /// <param name="dateTime">要判定的人日期</param>
        /// <returns>返回日期所對應的星期</returns>
        public static int GetWeekIntDay(DateTime dateTime)
        {
            switch (dateTime.DayOfWeek)
            {
                case DayOfWeek.Monday: return 1;
                case DayOfWeek.Tuesday: return 2;
                case DayOfWeek.Wednesday: return 3; 
                case DayOfWeek.Thursday: return 4;
                case DayOfWeek.Friday: return 5;
                case DayOfWeek.Saturday: return 6;
                case DayOfWeek.Sunday: return 7;
                default: return 0;
            }
        }