在.net2.0 的版本中的 System.Globalization.ChineseLunisolarCalendar 是針對中 國的日歷類,公歷與中國傳統農歷紀年之間的相互轉換,利用它可以計算天干地支等有關 農歷的信息。
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
下面我們來實現公歷轉農歷。
/// <summary>
/// 根據公歷獲取農歷日期
/// </summary>
/// <param name="datetime">公歷日期</param>
/// <returns></returns>
public static string GetChineseDateTime(DateTime datetime)
{
int lyear = cCalendar.GetYear(datetime);
int lmonth = cCalendar.GetMonth(datetime);
int lday = cCalendar.GetDayOfMonth(datetime);
//獲取閏月, 0 則表示沒有閏月
int leapMonth = cCalendar.GetLeapMonth(lyear);
bool isleap = false;
if (leapMonth > 0)
{
if (leapMonth == lmonth)
{
//閏月
isleap = true;
lmonth--;
}
else if (lmonth > leapMonth)
{
lmonth--;
}
}
return string.Concat(GetLunisolarYear(lyear), "年", isleap ? " 閏" : string.Empty, GetLunisolarMonth(lmonth), "月", GetLunisolarDay (lday));
}
測試的結果:
傳入日期:2010-3-4
返回農歷:庚寅[虎]年正月十九
可以滿足簡單的需求啦。
其他代碼也附上:
#region 農歷年
/// <summary>
/// 十天干
/// </summary>
private static string[] tiangan = { "甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸" };
/// <summary>
/// 十二地支
/// </summary>
private static string[] dizhi = { "子", "丑", "寅", "卯", "辰", " 巳", "午", "未", "申", "酉", "戌", "亥" };
/// <summary>
/// 十二生肖
/// </summary>
private static string[] shengxiao = { "鼠", "牛", "虎", "免", "龍", "蛇", "馬", "羊", "猴", "雞", "狗", "豬" };
/// <summary>
/// 返回農歷天干地支年
/// </summary>
/// <param name="year">農歷年</param>
/// <returns></returns>
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("無效的年份!");
}
#endregion
#region 農歷月
/// <summary>
/// 農歷月
/// </summary>
private static string[] months = { "正", "二", "三", "四", "五", "六", "七", "八", "九", "十", "十一", "十二(臘)" };
/// <summary>
/// 返回農歷月
/// </summary>
/// <param name="month">月份</param>
/// <returns></returns>
public static string GetLunisolarMonth(int month)
{
if (month < 13 && month > 0)
{
return months[month - 1];
}
throw new ArgumentOutOfRangeException("無效的月份!");
}
#endregion
#region 農歷日
/// <summary>
///
/// </summary>
private static string[] days1 = { "初", "十", "廿", "三" };
/// <summary>
/// 日
/// </summary>
private static string[] days = { "一", "二", "三", "四", "五", " 六", "七", "八", "九", "十" };
/// <summary>
/// 返回農歷日
/// </summary>
/// <param name="day"></param>
/// <returns></returns>
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 - 1) / 10], days1[1]);
}
}
throw new ArgumentOutOfRangeException("無效的日!");
}
#endregion
還有一個根據日期獲取生肖的代碼:
/// <summary>
/// 返回生肖
/// </summary>
/// <param name="datetime">公歷日期</param>
/// <returns></returns>
public static string GetShengXiao(DateTime datetime)
{
return shengxiao[cCalendar.GetTerrestrialBranch (cCalendar.GetSexagenaryYear(datetime)) - 1];
}
一切都變的簡單了。