根据日期获得节气

        /// <summary>
        /// 根据日期获得节气
        /// </summary>
        /// <param name="date"></param>
        /// <returns></returns>
        public string terms(DateTime date)
        {
            string[] SolarTerm = new string[] { "小寒", "大寒", "立春", "雨水", "惊蛰", "春分", "清明", "谷雨", "立夏", "小满", "芒种", "夏至", "小暑", "大暑", "立秋", "处暑", "白露", "秋分", "寒露", "霜降", "立冬", "小雪", "大雪", "冬至" };
            int[] sTermInfo = new int[] { 0, 21208, 42467, 63836, 85337, 107014, 128867, 150921, 173149, 195551, 218072, 240693, 263343, 285989, 308563, 331033, 353350, 375494, 397447, 419210, 440795, 462224, 483532, 504758 };
            DateTime baseDateAndTime = new DateTime(1900, 1, 6, 2, 5, 0); //#1/6/1900 2:05:00 AM#
            DateTime newDate;
            double num;
            int y;
            string tempStr = "";

            y = date.Year;

            for (int i = 1; i <= 24; i++)
            {
                num = 525948.76 * (y - 1900) + sTermInfo[i - 1];
                newDate = baseDateAndTime.AddMinutes(num);
                if (newDate.DayOfYear == date.DayOfYear)
                {
                    tempStr = SolarTerm[i - 1];
                    break;
                }
            }
            return tempStr;
        }