c#日期转化公历到日历转化

/// LunDay 的摘要说明。  

003     /// 用法说明  

004     /// 直接调用即可,比较简单  

005     /// </summary>  

006     public class LunDay  

007     {  

008         public LunDay()  

009         {  

010             //  

011             // TODO: 在此处添加构造函数逻辑  

012             //  

013         }  

014         //天干  

015         private static string[] TianGan = { "甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸" };  

016    

017         //地支  

018         private static string[] DiZhi = { "子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申", "酉", "戌", "亥" };  

019    

020         //十二生肖  

021         private static string[] ShengXiao = { "鼠", "牛", "虎", "兔", "龙", "蛇", "马", "羊", "猴", "鸡", "狗", "猪" };  

022    

023         //农历日期  

024         private static string[] DayName =   {"*","初一","初二","初三","初四","初五",  

025              "初六","初七","初八","初九","初十",  

026              "十一","十二","十三","十四","十五",  

027              "十六","十七","十八","十九","二十",  

028              "廿一","廿二","廿三","廿四","廿五",        

029              "廿六","廿七","廿八","廿九","三十"};  

030    

031         //农历月份  

032         private static string[] MonthName = { "*", "正", "二", "三", "四", "五", "六", "七", "八", "九", "十", "十一", "腊" };  

033    

034         //公历月计数天  

035         private static int[] MonthAdd = { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 };  

036         //农历数据  

037         private static int[] LunarData = {2635,333387,1701,1748,267701,694,2391,133423,1175,396438  

038             ,3402,3749,331177,1453,694,201326,2350,465197,3221,3402  

039             ,400202,2901,1386,267611,605,2349,137515,2709,464533,1738  

040             ,2901,330421,1242,2651,199255,1323,529706,3733,1706,398762  

041             ,2741,1206,267438,2647,1318,204070,3477,461653,1386,2413  

042             ,330077,1197,2637,268877,3365,531109,2900,2922,398042,2395  

043             ,1179,267415,2635,661067,1701,1748,398772,2742,2391,330031  

044             ,1175,1611,200010,3749,527717,1452,2742,332397,2350,3222  

045             ,268949,3402,3493,133973,1386,464219,605,2349,334123,2709  

046             ,2890,267946,2773,592565,1210,2651,395863,1323,2707,265877};  

047         /// <summary>  

048         /// 获取对应日期的农历  

049         /// </summary>  

050         /// <param name="dtDay">公历日期</param>  

051         /// <returns></returns>  

052         public string GetLunarCalendar(DateTime dtDay)  

053         {  

054             string sYear = dtDay.Year.ToString();  

055             string sMonth = dtDay.Month.ToString();  

056             string sDay = dtDay.Day.ToString();  

057             int year;  

058             int month;  

059             int day;  

060             try 

061             {  

062                 year = int.Parse(sYear);  

063                 month = int.Parse(sMonth);  

064                 day = int.Parse(sDay);  

065             }  

066             catch 

067             {  

068                 year = DateTime.Now.Year;  

069                 month = DateTime.Now.Month;  

070                 day = DateTime.Now.Day;  

071             }  

072    

073             int nTheDate;  

074             int nIsEnd;  

075             int k, m, n, nBit, i;  

076             string calendar = string.Empty;  

077             //计算到初始时间1921年2月8日的天数：1921-2-8(正月初一)  

078             nTheDate = (year - 1921) * 365 + (year - 1921) / 4 + day + MonthAdd[month - 1] - 38;  

079             if ((year % 4 == 0) && (month > 2))  

080                 nTheDate += 1;  

081             //计算天干，地支，月，日  

082             nIsEnd = 0;  

083             m = 0;  

084             k = 0;  

085             n = 0;  

086             while (nIsEnd != 1)  

087             {  

088                 if (LunarData[m] < 4095)  

089                     k = 11;  

090                 else 

091                     k = 12;  

092                 n = k;  

093                 while (n >= 0)  

094                 {  

095                     //获取LunarData[m]的第n个二进制位的值  

096                     nBit = LunarData[m];  

097                     for (i = 1; i < n + 1; i++)  

098                         nBit = nBit / 2;  

099                     nBit = nBit % 2;  

100                     if (nTheDate <= (29 + nBit))  

101                     {  

102                         nIsEnd = 1;  

103                         break;  

104                     }  

105                     nTheDate = nTheDate - 29 - nBit;  

106                     n = n - 1;  

107                 }  

108                 if (nIsEnd == 1)  

109                     break;  

110                 m = m + 1;  

111             }  

112             year = 1921 + m;  

113             month = k - n + 1;  

114             day = nTheDate;  

115             //return year+"-"+month+"-"+day;  

116    

117             #region 格式化日期显示为三月廿四  

118             if (k == 12)  

119             {  

120                 if (month == LunarData[m] / 65536 + 1)  

121                     month = 1 - month;  

122                 else if (month > LunarData[m] / 65536 + 1)  

123                     month = month - 1;  

124             }  

125    

126             //生肖  

127             calendar = ShengXiao[(year - 4) % 60 % 12].ToString() + "年 ";  

128             //天干  

129             calendar += TianGan[(year - 4) % 60 % 10].ToString();  

130             //地支  

131             calendar += DiZhi[(year - 4) % 60 % 12].ToString() + " ";  

132    

133             //农历月  

134             if (month < 1)  

135                 calendar += "闰" + MonthName[-1 * month].ToString() + "月";  

136             else 

137                 calendar += MonthName[month].ToString() + "月";  

138    

139             //农历日  

140             calendar += DayName[day].ToString() + "日";  

141    

142             return calendar;  

143    

144             #endregion  

145         }  

146     } 

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