C# 获取农历日期

//C# 获取农历日期

///<summary>
/// 实例化一个 ChineseLunisolarCalendar
///</summary>
privatestatic ChineseLunisolarCalendar ChineseCalendar =new ChineseLunisolarCalendar();

///<summary>
/// 十天干
///</summary>
privatestaticstring[] tg = { "甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸" };

///<summary>
/// 十二地支
///</summary>
privatestaticstring[] dz = { "子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申", "酉", "戌", "亥" };

///<summary>
/// 十二生肖
///</summary>
privatestaticstring[] sx = { "鼠", "牛", "虎", "免", "龙", "蛇", "马", "羊", "猴", "鸡", "狗", "猪" };

///<summary>
/// 返回农历天干地支年
///</summary>
///<param name="year">农历年</param>
///<returns></returns>
publicstaticstring GetLunisolarYear(int year)
{
if (year >3)
{
int tgIndex = (year -4) %10;
int dzIndex = (year -4) %12;

returnstring.Concat(tg[tgIndex], dz[dzIndex], "[", sx[dzIndex], "]");
}

thrownew ArgumentOutOfRangeException("无效的年份!");
}

///<summary>
/// 农历月
///</summary>

///<returns></returns>
privatestaticstring[] months = { "正", "二", "三", "四", "五", "六", "七", "八", "九", "十", "十一", "十二(腊)" };

///<summary>
/// 农历日
///</summary>
privatestaticstring[] days1 = { "初", "十", "廿", "三" };
///<summary>
/// 农历日
///</summary>
privatestaticstring[] days = { "一", "二", "三", "四", "五", "六", "七", "八", "九", "十" };

///<summary>
/// 返回农历月
///</summary>
///<param name="month">月份</param>
///<returns></returns>
publicstaticstring GetLunisolarMonth(int month)
{
if (month <13&& month >0)
{
return months[month -1];
}

thrownew ArgumentOutOfRangeException("无效的月份!");
}

///<summary>
/// 返回农历日
///</summary>
///<param name="day">天</param>
///<returns></returns>
publicstaticstring GetLunisolarDay(int day)
{
if (day >0&& day <32)
{
if (day !=20&& day !=30)
{
returnstring.Concat(days1[(day -1) /10], days[(day -1) %10]);
}
else
{
returnstring.Concat(days[(day -1) /10], days1[1]);
}
}

thrownew ArgumentOutOfRangeException("无效的日!");
}

///<summary>
/// 根据公历获取农历日期
///</summary>
///<param name="datetime">公历日期</param>
///<returns></returns>
publicstaticstring GetChineseDateTime(DateTime datetime)
{
int year = ChineseCalendar.GetYear(datetime);
int month = ChineseCalendar.GetMonth(datetime);
int day = ChineseCalendar.GetDayOfMonth(datetime);
//获取闰月， 0 则表示没有闰月
int leapMonth = ChineseCalendar.GetLeapMonth(year);

bool isleap =false;

if (leapMonth >0)
{
if (leapMonth == month)
{
//闰月
isleap =true;
month--;
}
elseif (month > leapMonth)
{
month--;
}
}

returnstring.Concat(GetLunisolarYear(year), "年", isleap ?"闰" : string.Empty, GetLunisolarMonth(month), "月", GetLunisolarDay(day));
}