C#自己写农历日历

废话不多说，直接上代码:

  //天干  
        private  static string []TianGan =   {"甲","乙","丙","丁","戊","己","庚","辛","壬","癸"};     
        //地支  
        private  static string []DiZhi =     {"子","丑","寅","卯","辰","巳","午","未","申","酉","戌","亥"};     
        //十二生肖  
        private  static string []ShengXiao = {"鼠","牛","虎","兔","龙","蛇","马","羊","猴","鸡","狗","猪"};     
        //农历日期  
        private  static string []DayName =   {"*","初一","初二","初三","初四","初五","初六","初七","初八","初九","初十",  "十一","十二","十三","十四","十五",             "十六","十七","十八","十九","二十",             "廿一","廿二","廿三","廿四","廿五",                   "廿六","廿七","廿八","廿九","三十"};     
        //农历月份
        private static string []MonthName =  {"*","正","二","三","四","五","六","七","八","九","十","十一","腊"};     
        //公历月计数天  
        private  static int []MonthAdd =      {0,31,59,90,120,151,181,212,243,273,304,334};  
        //农历数据  
        private static int []LunarData =    {2635,333387,1701,1748,267701,694,2391,133423,1175,396438            ,3402,3749,331177,1453,694,201326,2350,465197,3221,3402            ,400202,2901,1386,267611,605,2349,137515,2709,464533,1738            ,2901,330421,1242,2651,199255,1323,529706,3733,1706,398762            ,2741,1206,267438,2647,1318,204070,3477,461653,1386,2413            ,330077,1197,2637,268877,3365,531109,2900,2922,398042,2395            ,1179,267415,2635,661067,1701,1748,398772,2742,2391,330031            ,1175,1611,200010,3749,527717,1452,2742,332397,2350,3222            ,268949,3402,3493,133973,1386,464219,605,2349,334123,2709            ,2890,267946,2773,592565,1210,2651,395863,1323,2707,265877};  
        /// 
  
        /// 获取对应日期的农历 
        /// 
        /// 
  
        /// 公历日期 
        ///
        ///  
        public string GetLunarCalendar(DateTime dtDay)
        {
            string sYear = dtDay.Year.ToString(); string sMonth = dtDay.Month.ToString(); string sDay = dtDay.Day.ToString(); int year; int month; int day; try { year = int.Parse(sYear); month = int.Parse(sMonth); day = int.Parse(sDay); }
            catch { year = DateTime.Now.Year; month = DateTime.Now.Month; day = DateTime.Now.Day; } int nTheDate; int nIsEnd; int k, m, n, nBit, i; string calendar = string.Empty;
            //计算到初始时间1921年2月8日的天数：1921-2-8(正月初一)   
            nTheDate = (year - 1921) * 365 + (year - 1921) / 4 + day + MonthAdd[month - 1] - 38; if ((year % 4 == 0) && (month > 2)) nTheDate += 1;
            //计算天干，地支，月，日
            nIsEnd = 0; m = 0; k = 0; n = 0; while (nIsEnd != 1)
            {
                if (LunarData[m] < 4095) k = 11; else k = 12; n = k; while (n >= 0)
                {     //获取LunarData[m]的第n个二进制位的值 
                    nBit = LunarData[m]; for (i = 1; i < n + 1; i++) nBit = nBit / 2; nBit = nBit % 2; if (nTheDate <= (29 + nBit)) { nIsEnd = 1; break; } nTheDate = nTheDate - 29 - nBit; n = n - 1;
                } if (nIsEnd == 1) break; m = m + 1;
            }
            year = 1921 + m; month = k - n + 1; day = nTheDate;

            #region 格式化日期显示为三月廿四
            if (k == 12)
            {
                if (month == LunarData[m] / 65536 + 1)
                    month = 1 - month;
                else if (month > LunarData[m] / 65536 + 1)
                    month = month - 1;
            }
            //生肖//
            calendar = ShengXiao[(year - 4) % 60 % 12].ToString() + "年 ";
            //   //            //天干//   //
            calendar += TianGan[(year - 4) % 60 % 10].ToString();
            //   //            //地支//   // 
            calendar += DiZhi[(year - 4) % 60 % 12].ToString() + " ";
            ////   //农历月//
            if (month < 1)
                //
                calendar += "闰" + MonthName[-1 * month].ToString() + "月";
            else
                calendar += MonthName[month].ToString() + "月";
            ////   //农历日//  
            calendar += DayName[day].ToString() + "日";////  
            return calendar;////   
            #endregion
        }