公历转农历源代码

用c＃改写别人的公历到农历转换程序，基本上没改动。等晚上回家有空再慢慢改改吧，上班勒 :(

    class Lunar
    {
        //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};

        /**//// <summary>
        /// 获取对应日期的农历
        /// </summary>
        /// <param name="sDate">公历日期</param>
        /// <returns></returns>
        public static string GetLunarCalendar(string sYear,string sMonth,string sDay)
        {
            int year;
            int month;
            int day;

            try
            {
                year = int.Parse(sYear);
                month = int.Parse(sMonth);
                day = int.Parse(sDay);
            }
            catch(Exception ee)
            {
                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;
            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;
        }
    }