.net 如何判断农历节日

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发布时间：2019-05-26

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http://ilewen.com/questions/3480

如下：

使用

static ChineseLunisolarCalendar cCalendar = new ChineseLunisolarCalendar();cCalendar.MaxSupportedDateTime 返回支持的最大日期，即2101-1-28cCalendar.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。

/// /// 根据公历获取农历日期/// 
/// 公历日期/// 
         public static string GetChineseDateTime(DateTime datetime){
             int lyear = cCalendar.GetYear(datetime);    int lmonth = cCalendar.GetMonth(datetime);    int lday = cCalendar.GetDayOfMonth(datetime);    //获取闰月， 0 则表示没有闰月    int leapMonth = cCalendar.GetLeapMonth(lyear);    bool isleap = false;    if (leapMonth > 0)    {
                 if (leapMonth == lmonth)        {
                     //闰月            isleap = true;            lmonth--;        }        else if (lmonth > leapMonth)        {
                     lmonth--;        }    }    return string.Concat(GetLunisolarYear(datetime.Year), "年", isleap ? "闰" : string.Empty, GetLunisolarMonth(lmonth), "月", GetLunisolarDay(lday));}

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：

region 农历年

/// /// 十天干/// 
private static string[] tiangan = {
          "甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸" };/// /// 十二地支/// 
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", "免", "龙", "蛇", "马", "羊", "猴", "鸡", "狗", "猪" };/// /// 返回农历天干地支年 /// 
/// 公历年/// 
         public static string GetLunisolarYear(int year){
             if (year > 3)    {
                 int tgIndex = (year - 4) % 10;        int dzIndex = (year - 4) % 12;        return string.Concat(tiangan[tgIndex], dizhi[dzIndex], "[", shengxiao[dzIndex], "]");    }    throw new ArgumentOutOfRangeException("无效的年份!");}       #endregion

region 农历月

/// /// 农历月/// 
private static string[] months = {
          "正", "二", "三", "四", "五", "六", "七", "八", "九", "十", "十一", "十二(腊)" };/// /// 返回农历月/// 
/// 月份/// 
         public static string GetLunisolarMonth(int month){
             if (month < 13 && month > 0)    {
                 return months[month - 1];    }    throw new ArgumentOutOfRangeException("无效的月份!");}#endregion

region 农历日

/// /// /// 
private static string[] days1 = {
          "初", "十", "廿", "三" };/// /// 日/// 
private static string[] days = {
          "一", "二", "三", "四", "五", "六", "七", "八", "九", "十" };/// /// 返回农历日/// 
/// /// 
         public static string GetLunisolarDay(int day){
             if (day > 0 && day < 32)    {
                 if (day != 20 && day != 30)        {
                     return string.Concat(days1[(day - 1) / 10], days[(day - 1) % 10]);        }        else        {
                     return string.Concat(days[day / 10], days1[1]);        }    }    throw new ArgumentOutOfRangeException("无效的日!");}#endregion

还有一个根据日期获取生肖的代码:

/// /// 返回生肖/// 
/// 公历日期/// 
         public static string GetShengXiao(DateTime datetime){
             return shengxiao[cCalendar.GetTerrestrialBranch(cCalendar.GetSexagenaryYear(datetime)) - 1];}