使用ChineseLunisolarCalendar类转换公历和农历日期

System.Globalization.ChineseLunisolarCalendar 是针对中国的日历类，公历与中国传统农历纪年之间的相互转换，利用它可以计算天干地支等有关农历的信息。

使用

static ChineseLunisolarCalendar cCalendar = new ChineseLunisolarCalendar();

cCalendar.MaxSupportedDateTime 返回支持的最大日期，即2101-1-28

cCalendar.MinSupportedDateTime  返回支持的最小日期，即1901－2-19

下面我们来实现公历转农历。

1. /// <summary>
   
2. /// 根据公历获取农历日期
   
3. /// </summary>
   
4. /// <param name="datetime">公历日期</param>
   
5. /// <returns></returns>
   
6. public static string GetChineseDateTime(DateTime datetime)
   
7. {
   
8.     int lyear = cCalendar.GetYear(datetime);
   
9.     int lmonth = cCalendar.GetMonth(datetime);
   
10.     int lday = cCalendar.GetDayOfMonth(datetime);
    
11. 
    
12.     //获取闰月， 0 则表示没有闰月
    
13.     int leapMonth = cCalendar.GetLeapMonth(lyear);
    
14. 
    
15.     bool isleap = false;
    
16. 
    
17.     if (leapMonth > 0)
    
18.     {
    
19.         if (leapMonth == lmonth)
    
20.         {
    
21.             //闰月
    
22.             isleap = true;
    
23.             lmonth--;
    
24.         }
    
25.         else if (lmonth > leapMonth)
    
26.         {
    
27.             lmonth--;
    
28.         }
    
29.     }
    
30. 
    
31.     return string.Concat(GetLunisolarYear(datetime.Year), "年", isleap ? "闰" : string.Empty, GetLunisolarMonth(lmonth), "月", GetLunisolarDay(lday));
    
32. }
    

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测试的结果:

传入日期：2010-3-4

返回农历：庚寅[虎]年正月十九

可以满足简单的需求啦。

其他代码也附上：

1. #region 农历年
   
2. 
   
3. /// <summary>
   
4. /// 十天干
   
5. /// </summary>
   
6. private static string[] tiangan = { "甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸" };
   
7. 
   
8. /// <summary>
   
9. /// 十二地支
   
10. /// </summary>
    
11. private static string[] dizhi = { "子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申", "酉", "戌", "亥" };
    
12. 
    
13. /// <summary>
    
14. /// 十二生肖
    
15. /// </summary>
    
16. private static string[] shengxiao = { "鼠", "牛", "虎", "免", "龙", "蛇", "马", "羊", "猴", "鸡", "狗", "猪" };
    
17. 
    
18. /// <summary>
    
19. /// 返回农历天干地支年 
    
20. /// </summary>
    
21. /// <param name="year">公历年</param>
    
22. /// <returns></returns>
    
23. public static string GetLunisolarYear(int year)
    
24. {
    
25.     if (year > 3)
    
26.     {
    
27.         int tgIndex = (year - 4) % 10;
    
28.         int dzIndex = (year - 4) % 12;
    
29. 
    
30.         return string.Concat(tiangan[tgIndex], dizhi[dzIndex], "[", shengxiao[dzIndex], "]");
    
31. 
    
32.     }
    
33. 
    
34.     throw new ArgumentOutOfRangeException("无效的年份!");
    
35. }      
    
36. #endregion
    
37. 
    
38. #region 农历月
    
39. 
    
40. /// <summary>
    
41. /// 农历月
    
42. /// </summary>
    
43. private static string[] months = { "正", "二", "三", "四", "五", "六", "七", "八", "九", "十", "十一", "十二(腊)" };
    
44. /// <summary>
    
45. /// 返回农历月
    
46. /// </summary>
    
47. /// <param name="month">月份</param>
    
48. /// <returns></returns>
    
49. public static string GetLunisolarMonth(int month)
    
50. {
    
51.     if (month < 13 && month > 0)
    
52.     {
    
53.         return months[month - 1];
    
54.     }
    
55. 
    
56.     throw new ArgumentOutOfRangeException("无效的月份!");
    
57. }
    
58. #endregion
    
59. 
    
60. #region 农历日
    
61. 
    
62. /// <summary>
    
63. /// 
    
64. /// </summary>
    
65. private static string[] days1 = { "初", "十", "廿", "三" };
    
66. 
    
67. /// <summary>
    
68. /// 日
    
69. /// </summary>
    
70. private static string[] days = { "一", "二", "三", "四", "五", "六", "七", "八", "九", "十" };
    
71. 
    
72. /// <summary>
    
73. /// 返回农历日
    
74. /// </summary>
    
75. /// <param name="day"></param>
    
76. /// <returns></returns>
    
77. public static string GetLunisolarDay(int day)
    
78. {
    
79.     if (day > 0 && day < 32)
    
80.     {
    
81.         if (day != 20 && day != 30)
    
82.         {
    
83.             return string.Concat(days1[(day - 1) / 10], days[(day - 1) % 10]);
    
84.         }
    
85.         else
    
86.         {
    
87.             return string.Concat(days[day / 10], days1[1]);
    
88.         }
    
89.     }
    
90. 
    
91.     throw new ArgumentOutOfRangeException("无效的日!");
    
92. }
    
93. 
    
94. #endregion
    

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还有一个根据日期获取生肖的代码:

1. /// <summary>
   
2. /// 返回生肖
   
3. /// </summary>
   
4. /// <param name="datetime">公历日期</param>
   
5. /// <returns></returns>
   
6. public static string GetShengXiao(DateTime datetime)
   
7. {
   
8.     return shengxiao[cCalendar.GetTerrestrialBranch(cCalendar.GetSexagenaryYear(datetime)) - 1];
   
9. }
   

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