using System;using System.Collections;using System.Collections.Generic;using System.Globalization;using System.Linq;using System.Linq.Expressions;using System.Text;namespace CalendarGenerationTool{/// <summary>/// ChinaDate/// 一日有十二时辰，一时辰有四刻，一刻有三盏茶，一盏茶有两柱香/// 一柱香有五分，一分有六弹指，一弹指有十刹那，一刹那为一念/// </summary>///public static partial class ChinaDate{public static int MyYear { get; set; }#region ====== 内部常量 ====================================================================================public static readonly ChineseLunisolarCalendar _chineseDateTime = new ChineseLunisolarCalendar();public static readonly string[] _chineseNumber = { "〇", "一", "二", "三", "四", "五", "六", "七", "八", "九" };public static readonly string[] _chineseMonth ={"正月", "二月", "三月", "四月", "五月", "六月", "七月", "八月", "九月", "十月", "冬月", "腊月"};public static readonly string[] _chineseDay ={"初一", "初二", "初三", "初四", "初五", "初六", "初七", "初八", "初九", "初十","十一", "十二", "十三", "十四", "十五", "十六", "十七", "十八", "十九", "二十","廿一", "廿二", "廿三", "廿四", "廿五", "廿六", "廿七", "廿八", "廿九", "三十"};public static readonly string[] _chineseWeek ={"星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"};public static readonly string[] _celestialStem = { "甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸" };public static readonly string[] _terrestrialBranch = { "子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申", "酉", "戌", "亥" };public static readonly string[] _chineseZodiac = { "鼠", "牛", "虎", "兔", "龙", "蛇", "马", "羊", "猴", "鸡", "狗", "猪" };public static readonly string[] _solarTerm ={"小寒", "大寒", "立春", "雨水", "惊蛰", "春分","清明", "谷雨", "立夏", "小满", "芒种", "夏至","小暑", "大暑", "立秋", "处暑", "白露", "秋分","寒露", "霜降", "立冬", "小雪", "大雪", "冬至"};public static readonly int[] _solarTermInfo = {0, 21208, 42467, 63836, 85337, 107014, 128867, 150921, 173149, 195551, 218072, 240693, 263343, 285989,308563, 331033, 353350, 375494, 397447, 419210, 440795, 462224, 483532, 504758};public static Hashtable Public_Holiday = new Hashtable(), Lunar_Holiday = new Hashtable();static ChinaDate(){//公历节日Public_Holiday.Add("0101", "元旦");Public_Holiday.Add("0214", "情人节");Public_Holiday.Add("0305", "雷锋日");Public_Holiday.Add("0308", "妇女节");Public_Holiday.Add("0312", "植树节");Public_Holiday.Add("0315", "消费者权益日");Public_Holiday.Add("0501", "劳动节");Public_Holiday.Add("0504", "青年节");Public_Holiday.Add("0601", "儿童节");Public_Holiday.Add("0701", "建党节");Public_Holiday.Add("0801", "建军节");Public_Holiday.Add("0910", "教师节");Public_Holiday.Add("1001", "国庆节");Public_Holiday.Add("1224", "平安夜");Public_Holiday.Add("1225", "圣诞节");//农历节日Lunar_Holiday.Add("0101", "春节");Lunar_Holiday.Add("0115", "元宵节");Lunar_Holiday.Add("0202", "龙头节");Lunar_Holiday.Add("0505", "端午节");Lunar_Holiday.Add("0707", "七夕节");Lunar_Holiday.Add("0715", "中元节");Lunar_Holiday.Add("0815", "中秋节");Lunar_Holiday.Add("0909", "重阳节");Lunar_Holiday.Add("1208", "腊八节");Lunar_Holiday.Add("1224", "小年");}#endregion//------- 获取方法(Chinese) -------#region ====== 获取农历年份 ====================================================================================/// <summary>/// 获取当前日期农历年份/// </summary>/// <returns>当前日期农历年份</returns>public static string GetYear(){return GetYear(DateTime.Now);}/// <summary>/// 获取给定日期农历年份/// </summary>/// <param name="year">四位数字年份</param>/// <returns>给定日期农历年份</returns>public static string GetYear(int year){return GetYear(new DateTime(year, 1, 1));}/// <summary>/// 获取给定日期农历年份/// </summary>/// <param name="year">四位数字年份</param>/// <param name="month">数字月份</param>/// <returns>给定日期农历年份</returns>public static string GetYear(int year, int month){return GetYear(new DateTime(year, month, 1));}/// <summary>/// 获取给定日期农历年份/// </summary>/// <param name="year">四位数字年份</param>/// <param name="month">数字月份</param>/// <param name="day">数字天</param>/// <returns>给定日期农历年份</returns>public static string GetYear(int year, int month, int day){return GetYear(new DateTime(year, month, day));}// <summary>/// 获取农历年份/// </summary>/// <param name="dateTime">给定日期（DateTime）对象</param>/// <returns>农历年份</returns>///public static string GetYear(DateTime dateTime){var yearArray = Array.ConvertAll(_chineseDateTime.GetYear(dateTime).ToString().ToCharArray(), x => int.Parse(x.ToString()));var year = new StringBuilder();foreach (var item in yearArray)year.Append(_chineseNumber[item]);return year.ToString();}#endregion#region ====== 获取农历月份 ====================================================================================/// <summary>/// 获取当前日期农历月份/// </summary>/// <returns>当前日期农历月份</returns>public static string GetMonth(){return GetMonth(DateTime.Now);}/// <summary>/// 获取给定日期农历月份/// </summary>/// <param name="year">四位数字年份</param>/// <param name="month">数字月份</param>/// <returns>给定日期农历月份</returns>public static string GetMonth(int year, int month){return GetMonth(new DateTime(year, month, 1));}/// <summary>/// 获取给定日期农历月份/// </summary>/// <param name="year">四位数字月份</param>/// <param name="month">数字月份</param>/// <param name="day">数字天</param>/// <returns>给定日期农历月份</returns>public static string GetMonth(int year, int month, int day){return GetMonth(new DateTime(year, month, day));}/// <summary>/// 获取农历月份/// </summary>/// <param name="dateTime">给定日期（DateTime）对象</param>/// <returns>农历月份</returns>public static string GetMonth(DateTime dateTime){int month = _chineseDateTime.GetMonth(dateTime);int leepMonth = _chineseDateTime.GetLeapMonth(_chineseDateTime.GetYear(dateTime));//获取闰月if (leepMonth > 0 && leepMonth <= month) month--;return $"{GetLeap(dateTime)}{_chineseMonth[month - 1]}";}#endregion#region ====== 获取农历日期(天) ====================================================================================/// <summary>/// 获取当前日期农历日期(天)/// </summary>/// <returns>返回当前日期农历日期(天)</returns>public static string GetDay(){return GetDay(DateTime.Now);}/// <summary>/// 获取给定日期农历日期(天)/// </summary>/// <param name="year">四位数字月份</param>/// <param name="month">数字月份</param>/// <param name="day">数字天</param>/// <returns>返回给定日期农历日期(天)</returns>public static string GetDay(int year, int month, int day){return GetDay(new DateTime(year, month, day));}/// <summary>/// 获取给定日期农历日期(天)/// </summary>/// <param name="dateTime">给定日期（DateTime）对象</param>/// <returns>返回农历给定日农历日期(天)</returns>public static string GetDay(DateTime dateTime){string dstr = _chineseDay[_chineseDateTime.GetDayOfMonth(dateTime) - 1];if (!string.IsNullOrEmpty(GetLunHoliday(dateTime))){return GetLunHoliday(dateTime);}else if (!string.IsNullOrEmpty(GetPubHoliday(dateTime))){return GetPubHoliday(dateTime);}else{return "初一".Equals(dstr) ? GetMonth(dateTime) : dstr;}}//-------------------------------------------------------------------------------------------------------/// <summary>/// 获取当前日期农历日期(天)并输出是否是节假日/// </summary>/// <param name="IsHoliday">是否是节假日bool变量</param>/// <returns>返回当前日期农历日期(天)和输出是否是节假日，IsHoliday为true：表示当前为节假日，否则则不是！</returns>public static string GetDay(out bool IsHoliday){return GetDay(DateTime.Now, out IsHoliday);}/// <summary>/// 获取给定日期农历日期(天)/// </summary>/// <param name="year">四位数字月份</param>/// <param name="month">数字月份</param>/// <param name="day">数字天</param>/// <param name="IsHoliday">是否是节假日bool变量</param>/// <returns>返回给定日期农历日期(天)和输出是否是节假日，IsHoliday为true：表示当前为节假日，否则则不是！</returns>public static string GetDay(int year, int month, int day, out bool IsHoliday){return GetDay(new DateTime(year, month, day), out IsHoliday);}/// <summary>/// 获取给定日期农历日期(天)并输出是否是节假日/// </summary>/// <param name="dateTime">给定日期（DateTime）对象</param>/// <param name="IsHoliday">是否是节假日bool变量</param>/// <returns>返回农历给定日农历日期(天)和输出是否是节假日，IsHoliday为true：表示当前为节假日，否则则不是！</returns>public static string GetDay(DateTime dateTime, out bool IsHoliday){IsHoliday = false;string dstr = _chineseDay[_chineseDateTime.GetDayOfMonth(dateTime) - 1];if (!string.IsNullOrEmpty(GetLunHoliday(dateTime))){IsHoliday = true;return GetLunHoliday(dateTime);}else if (!string.IsNullOrEmpty(SolarTerm(dateTime))){IsHoliday = true;return SolarTerm(dateTime);}else if (!string.IsNullOrEmpty(GetPubHoliday(dateTime))){IsHoliday = true;return GetPubHoliday(dateTime);}else{return "初一".Equals(dstr) ? GetMonth(dateTime) : dstr;}}//-------------------------------------------------------------------------------------------------------/// <summary>/// 获取当前日期无节日农历日期(天)/// </summary>/// <returns>返回当前日期无节日农历日期(天)</returns>public static string GetDayWithoutHoliday(){return GetDayWithoutHoliday(DateTime.Now);}/// <summary>/// 获取给定日期无节日农历日期(天)/// </summary>/// <param name="year">四位数字月份</param>/// <param name="month">数字月份</param>/// <param name="day">数字天</param>/// <returns>返回给定日期无节日农历日期(天)</returns>public static string GetDayWithoutHoliday(int year, int month, int day){return GetDayWithoutHoliday(new DateTime(year, month, day));}/// <summary>/// 获取给定日期无节日农历日期(天)/// </summary>/// <param name="dateTime">给定日期（DateTime）对象</param>/// <returns>返回给定日期无节日农历日期(天)；如：初九</returns>public static string GetDayWithoutHoliday(DateTime dateTime){return _chineseDay[_chineseDateTime.GetDayOfMonth(dateTime) - 1];}#endregion#region ====== 获取星期（数字） ====================================================================================/// <summary>/// 获取当前日期星期（数字）/// </summary>/// <returns>以数字返回当前日期星期</returns>public static int GetWeek(){return GetWeek(DateTime.Now);}/// <summary>/// 获取给定日期星期（数字）/// </summary>/// <param name="year">四位数字月份</param>/// <param name="month">数字月份</param>/// <param name="day">数字天</param>/// <returns>以数字返回给定日期星期</returns>public static int GetWeek(int year, int month, int day){return GetWeek(new DateTime(year, month, day));}/// <summary>/// 获取给定日期星期（数字）/// </summary>/// <param name="dateTime">给定日期（DateTime）对象</param>/// <returns>以数字返回返回给定日期星期</returns>public static int GetWeek(DateTime dateTime){return (int)dateTime.DayOfWeek;}#endregion#region ====== 判断当前日期是否是农历闰月 =============================================================================/// <summary>/// 判断当前日期是否是农历闰月/// </summary>/// <returns>是农历闰月返回true，否则返回false</returns>public static string GetLeap(){return GetLeap(DateTime.Now);}/// <summary>/// 判断给定日期是否是农历闰月/// </summary>/// <param name="year">四位数字年份</param>/// <param name="month">数字月份</param>/// <returns>是农历闰月返回true，否则返回false</returns>public static string GetLeap(int year, int month){return GetLeap(new DateTime(year, month, 1));}/// <summary>/// 判断给定日期是否是农历闰月/// </summary>/// <param name="year">四位数字月份</param>/// <param name="month">数字月份</param>/// <param name="day">数字天</param>/// <returns>是农历闰月返回true，否则返回false</returns>public static string GetLeap(int year, int month, int day){return GetLeap(new DateTime(year, month, day));}/// <summary>/// 判断给定日期是否是农历闰月/// </summary>/// <param name="dateTime">给定日期（DateTime）对象</param>/// <returns>给定日期是农历闰月返回true，否则返回false</returns>public static string GetLeap(DateTime dateTime){int Year = _chineseDateTime.GetYear(dateTime), Month = _chineseDateTime.GetMonth(dateTime);return _chineseDateTime.IsLeapMonth(Year, Month) ? true ? "闰" : "L" : "";}#endregion#region ====== 判断否是公历闰年 ====================================================================================/// <summary>/// 判断当前日期年份是否为闰年/// </summary>/// <returns>返回布尔值true为闰年，反之不是</returns>public static bool IsLeapYear(){return IsLeapYear(DateTime.Now);}/// <summary>/// 判断指定日期年份是否为闰年/// </summary>/// <param name="year">DateTime对象</param>/// <returns>返回布尔值true为闰年，反之不是</returns>public static bool IsLeapYear(DateTime dateTime){return IsLeapYear(dateTime.Year);}/// <summary>/// 判断指定年份是否为闰年/// </summary>/// <param name="year">年份</param>/// <returns>返回布尔值true为闰年，反之不是</returns>public static bool IsLeapYear(int year){return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0 && year % 3200 != 0) || year % 172800 == 0;}#endregion#region ====== 获取完整农历日期 ====================================================================================/// <summary>/// 获取当前日期的完整农历日期/// </summary>/// <returns>返回当前日期的完整农历日期，如：二〇一八年六月初九</returns>public static string GetChinaDate(){return GetChinaDate(DateTime.Now);}/// <summary>/// 获取按给定XXXX年【1】月【1】日的完整农历日期/// </summary>/// <param name="year">四位数字年份</param>/// <returns>返回给定XXXX年【1】月【1】日的完整农历日期，如：二〇一八年【正月】【初一】</returns>public static string GetChinaDate(int year){return GetChinaDate(new DateTime(year, 1, 1));}/// <summary>/// 获取按给定XXXX年XX月【1】日的完整农历日期/// </summary>/// <param name="year">四位数字年份</param>/// <param name="month">数字月份</param>/// <returns>返回给定XXXX年XX月1日的完整农历日期，如：二〇一八年六月【初一】</returns>public static string GetChinaDate(int year, int month){return GetChinaDate(new DateTime(year, month, 1));}/// <summary>/// 获取按给定日期的完整农历日期/// </summary>/// <param name="year">四位数字年份</param>/// <param name="month">数字月份</param>/// <param name="day">数字天</param>/// <returns>返回给定日期的完整农历日期，如：二〇一八年六月初九</returns>public static string GetChinaDate(int year, int month, int day){return GetChinaDate(new DateTime(year, month, day));}/// <summary>/// 获取给定日期完整农历日期/// </summary>/// <param name="dateTime">给定日期（DateTime）对象</param>/// <returns>返回给定日期农历日期，如：二〇一八年六月初九</returns>public static string GetChinaDate(DateTime dateTime){if (dateTime < _chineseDateTime.MinSupportedDateTime || dateTime > _chineseDateTime.MaxSupportedDateTime){throw new ArgumentOutOfRangeException($"参数日期不在有效的范围内：只支持{_chineseDateTime.MinSupportedDateTime.ToShortTimeString()}到{_chineseDateTime.MaxSupportedDateTime}");}return $"{GetYear(dateTime)}年{GetLeap(dateTime)}{GetMonth(dateTime)}{ _chineseDay[_chineseDateTime.GetDayOfMonth(dateTime) - 1]}";}#endregion#region ====== 获取节日 ====================================================================================/// <summary>/// 获取给定日期公历节日/// </summary>/// <param name="dt">给定日期（DateTime）对象</param>/// <returns>以字符串的形式返回给定日期公历节日</returns>public static string GetPubHoliday(DateTime dt){try{if (IsLeapYear(MyYear) || IsLeapYear(MyYear - 1))Public_Holiday.Add("0404", "清明节");elsePublic_Holiday.Add("0405", "清明节");Public_Holiday.Add(GetMumHoliday(MyYear), "母亲节");Public_Holiday.Add(GetDadHoliday(MyYear), "父亲节");}catch { }string strReturn = "";object g = Public_Holiday[dt.Month.ToString("00") + dt.Day.ToString("00")];if (null != g){strReturn = g.ToString();}return strReturn;}/// <summary>/// 获取农历节日/// </summary>/// <param name="dt"></param>/// <returns></returns>public static string GetLunHoliday(DateTime dt){string strReturn = "";int year = _chineseDateTime.GetYear(dt);int iMonth = _chineseDateTime.GetMonth(dt);int leapMonth = _chineseDateTime.GetLeapMonth(year);int iDay = _chineseDateTime.GetDayOfMonth(dt);if (_chineseDateTime.GetDayOfYear(dt) == _chineseDateTime.GetDaysInYear(year)){strReturn = "除夕";}else if (leapMonth != iMonth){if (leapMonth != 0 && iMonth >= leapMonth){iMonth--;}object n = Lunar_Holiday[iMonth.ToString("00") + iDay.ToString("00")];if (null != n){if (strReturn == ""){strReturn = n.ToString();}else{strReturn += " " + n.ToString();}}}return strReturn;}/// <summary>/// 获取指定年份母亲节节日/// </summary>/// <param name="year">指定年份</param>/// <returns>母亲节字符串："0510"</returns>public static string GetMumHoliday(int year){int day = 14 - (GetWeek(year, 5, 1) == 0 ? 7 : GetWeek(year, 5, 1)) + 1;return $"05{day:00}";}/// <summary>/// 获取指定年份父亲节节日/// </summary>/// <param name="year">指定年份</param>/// <returns>父亲节字符串："0621"</returns>public static string GetDadHoliday(int year){int day = 21 - (GetWeek(year, 6, 1) == 0 ? 7 : GetWeek(year, 6, 1)) + 1;return $"06{day:00}";}#endregion#region ====== 获取常规（数字）日期 ====================================================================================/// <summary>/// 短日期（农历）/// </summary>/// <returns>返回农历数字日期</returns>public static string ToShortDateString(DateTime dateTime){return $"{GetYear(dateTime)}-{GetLeap(dateTime)}{GetMonth(dateTime)}-{_chineseDateTime.GetDayOfMonth(dateTime)}";}/// <summary>/// 长日期（农历）/// </summary>/// <returns>返回农历数字日期</returns>public static string ToLongDateString(DateTime dateTime){return $"{GetYear(dateTime)}年{GetLeap(dateTime)}{GetMonth(dateTime)}月-{_chineseDateTime.GetDayOfMonth(dateTime)}日";}/// <summary>/// 长日期时间（农历）/// </summary>/// <returns>返回农历数字日期时间</returns>public static string ToLongDateTimeString(DateTime dateTime){return $"{GetYear(dateTime)}-{GetLeap(dateTime)}{GetMonth(dateTime)}-{_chineseDateTime.GetDayOfMonth(dateTime)} {dateTime.Hour}:{dateTime.Minute}:{dateTime.Second}";}#endregion#region ====== 输出中文日期、中文星期、一年中的第几周、一年中的第几天、本月的第几个星期======/// <summary>/// 获取当前日期的中文【年月日】日期/// </summary>/// <returns>返回当前日期的中文【年月日】日期；如：二〇一八年六月初九</returns>public static string GetChineseString(){return GetChineseString(DateTime.Now, "yMd");}/// <summary>/// 获取当前日期指定格式的中文【年月日】日期/// </summary>/// <param name="format">日期格式化字符串，可为"yMd"、"yM"、"y"三种</param>/// <returns>返回当前日期指定格式的中文【年月日】日期；如：GetChineseString("yM"); 结果：二〇一八年六月</returns>public static string GetChineseString(string format){return GetChineseString(DateTime.Now, format);}/// <summary>/// 获取给定日期的中文【年月日】日期/// </summary>/// <param name="dateTime">给定日期（DateTime）对象</param>/// <returns>返回给定日期的中文【年月日】日期；如：二〇一八年六月初九</returns>public static string GetChineseString(DateTime dateTime){return GetChineseString(dateTime, "yMd");}/// <summary>/// 获取给定日期指定格式的中文【年月日】日期/// </summary>/// <param name="dateTime">给定日期（DateTime）对象</param>/// <param name="format">日期格式化字符串，可为"yMd"、"yM"、"y"三种</param>/// <returns>返回给定日期指定格式的中文【年月日】日期；如：GetChineseString(DateTime.Now, "yM"); 结果：二〇一八年六月</returns>public static string GetChineseString(DateTime dateTime, string format){var year = GetYear(dateTime);var month = GetMonth(dateTime);var day = GetDayWithoutHoliday(dateTime);var date = new StringBuilder();foreach (var item in format.ToCharArray()){switch (item){case 'y':date.Append($"{year}年");break;case 'M':date.Append($"{month}月");break;case 'd':date.Append($"{day}");break;default:date.Append(item);break;}}var def = $"{year}年{month}月{day}";var result = date.ToString();return string.IsNullOrEmpty(result) ? def : result;}/// <summary>/// 获取给定日期星期/// </summary>/// <param name="dateTime">给定日期（DateTime）对象</param>/// <returns>返回星期几，如：星期三</returns>public static string GetChineseWeek(DateTime dateTime) => _chineseWeek[(int)dateTime.DayOfWeek];/// <summary>/// 获取给定日期是一年中第几天/// </summary>/// <param name="date">给定日期（DateTime）对象</param>/// <returns>返回给定日期是一年中第几天</returns>public static int GetDayNumberOfYear(DateTime dateTime){return CultureInfo.CurrentCulture.Calendar.GetDayOfYear(dateTime);}/// <summary>/// 判断给定日期是本月内的第几周/// </summary>/// <param name="dateTime">给定日期（DateTime）对象</param>/// <param name="sundayStart">默认为true：一周的第一天为周日，false：一周的第一天为周一</param>/// <returns>返回给定日期是本月内的第几周</returns>public static int GetWeekOfMonth(DateTime dateTime, bool sundayStart = true){if (dateTime.Day == 1) return 1;else{//得到本月第一天是周几int dayofweek = GetWeek(dateTime.Year, dateTime.Month, 1);//如果不是以周日开始，需要重新计算一下dayofweek，详细风DayOfWeek枚//如果不是以周日开始，需要重新计算一下dayofweek，详细风DayOfWeek枚举的定义if (!sundayStart){dayofweek -= 1;if (dayofweek < 0)dayofweek = 7;}//得到本月的第一周一共有几天int startWeekDays = 7 - dayofweek;//如果要判断的日期在第一周范围内，返回1if (dateTime.Day <= startWeekDays)return 1;else{int aday = dateTime.Day + 7 - startWeekDays;return aday / 7 + (aday % 7 > 0 ? 1 : 0);}}}/// <summary>/// 获取给定日期是本年中第几个星期/// </summary>/// <param name="date">给定日期（DateTime）对象</param>/// <returns>返回给定日期是本年中第几个星期</returns>public static int GetWeekNumberOfYear(DateTime dateTime){return CultureInfo.CurrentCulture.Calendar.GetWeekOfYear(dateTime, CalendarWeekRule.FirstDay, DayOfWeek.Sunday);}#endregion#region ====== 输助方法（天干地支）===================================================================================//年采用的头尾法，月采用的是节令法，主流日历基本上都这种结合，如百度的日历/// <summary>/// 获取给定日期天干地支纪元的年/// </summary>/// <param name="datetime">给定日期（DateTime）对象</param>/// <returns>返回给定日期天干地支纪元的年，如：庚子年</returns>public static string GetEraYear(DateTime datetime){var sexagenaryYear = _chineseDateTime.GetSexagenaryYear(datetime);var stemIndex = _chineseDateTime.GetCelestialStem(sexagenaryYear) - 1;var branchIndex = _chineseDateTime.GetTerrestrialBranch(sexagenaryYear) - 1;return $"{_celestialStem[stemIndex]}{_terrestrialBranch[branchIndex]}";}/// <summary>/// 获取给定年份的天干地支和生肖/// </summary>/// <param name="year">给定的年份</param>/// <returns>返回给定年份的天干地支和生肖，如：庚子鼠</returns>public static string GetEraYearZodiac(int year){int tg = ((year - 3) % 10) - 1 < 0 ? 9 : ((year - 3) % 10) - 1;int dz = ((year - 3) % 12) - 1 < 0 ? 11 : ((year - 3) % 12) - 1;int sx = ((year - 3) % 12) - 1 < 0 ? 11 : ((year - 3) % 12) - 1;return $"{_celestialStem[tg]}{_terrestrialBranch[dz]}{_chineseZodiac[sx]}";}/// <summary>/// 获取给定日期天干地支纪元的月/// </summary>/// <param name="datetime">给定日期（DateTime）对象</param>/// <returns>返回给定日期天干地支纪元的月，如：乙酉月</returns>public static string GetEraMonth(DateTime datetime){#region ====== 节令法 ======int Year = datetime.Year;var solarIndex = SolarTermFunc((x, y) => x <= y, datetime, out var dt);solarIndex = solarIndex == -1 ? 23 : solarIndex;var currentIndex = (int)Math.Floor(solarIndex / (decimal)2);//天干var solarMonth = currentIndex == 0 ? 11 : currentIndex - 1; //计算天干序(月份)var sexagenaryYear = _chineseDateTime.GetSexagenaryYear(datetime);var stemYear = _chineseDateTime.GetCelestialStem(sexagenaryYear) - 1;if (solarMonth == 0) //立春时，春节前后的不同处理{var year = _chineseDateTime.GetYear(dt);var month = _chineseDateTime.GetMonth(dt);stemYear = year == Year && month != 1 ? stemYear + 1 : stemYear;}if (solarMonth == 11) //立春在春节后，对前一节气春节前后不同处理{var year = _chineseDateTime.GetYear(dt);stemYear = year != Year ? stemYear - 1 : stemYear;}int stemIndex;switch (stemYear){case 0:case 5:stemIndex = 3;break;case 1:case 6:stemIndex = 5;break;case 2:case 7:stemIndex = 7;break;case 3:case 8:stemIndex = 9;break;default:stemIndex = 1;break;}//天干序stemIndex = (stemIndex - 1 + solarMonth) % 10;//地支序var branchIndex = currentIndex >= 11 ? currentIndex - 11 : currentIndex + 1;return $"{_celestialStem[stemIndex]}{_terrestrialBranch[branchIndex]}";#endregion#region ====== 头尾法 ======//这里算法要容易些，原理和节令法一样，只需取农历整年整月即可。未贴上来#endregion}/// <summary>/// 获取给定日期天干地支纪元的日/// </summary>/// <param name="dateTime">给定日期（DateTime）对象</param>/// <returns>返回给定日期天干地支纪元的日；如：丁丑日</returns>public static string GetEraDay(DateTime dateTime){var ts = dateTime - new DateTime(1901, 2, 15);var offset = ts.Days;var sexagenaryDay = offset % 60;return $"{_celestialStem[sexagenaryDay % 10]}{_terrestrialBranch[sexagenaryDay % 12]}";}/// <summary>/// 获取给定日期天干地支纪元的时/// </summary>/// <param name="dateTime">给定日期（DateTime）对象</param>/// <returns>返回给定日期天干地支纪元的时，如：子时</returns>public static string GetEraHour(DateTime dateTime){var hourIndex = (int)Math.Floor((dateTime.Hour + 1) / (decimal)2);hourIndex = hourIndex == 12 ? 0 : hourIndex;return _terrestrialBranch[hourIndex];}/// <summary>/// 获取给定日期天干地支纪元的刻/// </summary>/// <param name="dateTime">给定日期（DateTime）对象</param>/// <returns>返回给定日期天干地支纪元的刻，如：三刻</returns>public static string GetEraMinute(DateTime dateTime){var realMinute = (dateTime.Hour % 2 == 0 ? 60 : 0) + dateTime.Minute;return $"{_chineseNumber[(int)Math.Floor(realMinute / (decimal)30) + 1]}";}#endregion#region ====== 输出天干地支生肖 ====================================================================================/// <summary>/// 获取当前时间天干地支纪元年月日时刻/// </summary>/// <returns>返回指定时间天干地支纪元年月日时刻；如：戊戌年己未月甲寅日午时二刻</returns>public static string GetChineseEraString(){return GetChineseEraString(DateTime.Now);}/// <summary>/// 获取以当前时间指定格式的天干地支纪元的年月日时刻/// </summary>/// <param name="format">支持简易参数"yMdHm"，传法同中文日期</param>/// <returns>返回当前时间指定格式的天干地支纪元的年月日时刻；GetChineseEraString("yMdHm"); 结果：庚子年乙酉月丁丑日子时三刻</returns>public static string GetChineseEraString(string format){return GetChineseEraString(DateTime.Now, format);}/// <summary>/// 获取指定时间天干地支纪元的年月日时刻/// </summary>/// <param name="dateTime">给定日期（DateTime）对象</param>/// <returns>返回指定时间天干地支纪元的年月日时刻；如：戊戌年己未月甲寅日午时二刻</returns>public static string GetChineseEraString(DateTime dateTime){return GetChineseEraString(dateTime, "yMdHm");}/// <summary>/// 获取以给定时间指定格式的天干地支纪元的年月日时刻/// </summary>/// <param name="dateTime">给定日期（DateTime）对象</param>/// <param name="format">日期格式化字符串，可为"yMdHm"、"yMdH"、"yMd"、"yMd"、"yM"、"y"三种</param>/// <returns>返回给定时间指定格式的天干地支纪元的年月日时刻；GetChineseEraString(DateTime.Now, "yMdHm"); 结果：庚子年乙酉月丁丑日子时三刻</returns>public static string GetChineseEraString(DateTime dateTime, string format){var year = GetEraYear(dateTime);var month = GetEraMonth(dateTime);var day = GetEraDay(dateTime);var hour = GetEraHour(dateTime);var minute = GetEraMinute(dateTime);var date = new StringBuilder();foreach (var item in format.ToCharArray()){switch (item){case 'y':date.Append($"{year}年");break;case 'M':date.Append($"{month}月");break;case 'd':date.Append($"{day}日");break;case 'H':date.Append($"{hour}时");break;case 'm':date.Append($"{minute}刻");break;default:date.Append(item);break;}}var def = $"{year}年{month}月{day}日{hour}时";var result = date.ToString();return string.IsNullOrEmpty(result) ? def : result;}/// <summary>/// 获取当前年份生肖/// </summary>public static string GetChineseZodiac(){return GetChineseZodiac(DateTime.Now.Year);}/// <summary>/// 获取指定年份生肖/// </summary>public static string GetChineseZodiac(int year) => _chineseZodiac[(year - 4) % 12];#endregion#region ======（甲子年天干地支）===================================================================================/// <summary>/// 计算与指定日期对应的一甲子（60 年）中循环中的年份。/// </summary>/// <param name="dateTime">给定日期（DateTime）对象</param>/// <returns>甲子循环中的一个从 1 到 60 的数字，它与 date 参数对应。</returns>public static int GetSexagenaryYear(DateTime dateTime) => _chineseDateTime.GetSexagenaryYear(dateTime);/// <summary>/// 计算一甲子（60 年）循环中指定年份的天干。/// </summary>/// <param name="sexagenaryYear">一个从 1 到 60 的整数，用于表示甲子循环中的一年。</param>/// <returns>当sexagenaryYear 小于 1 或大于 60时，返回一个从 1 到 12 的数字。否则返回 -1 。</returns>public static int GetCelestialStem(int sexagenaryYear){if (sexagenaryYear < 1 && sexagenaryYear > 60){return -1;}return _chineseDateTime.GetCelestialStem(sexagenaryYear);}/// <summary>/// 计算甲子 （60 年） 循环中的指定年份的地支/// </summary>/// <param name="sexagenaryYear">一个从 1 到 60 的整数，用于表示甲子循环中的一年。</param>/// <returns>当sexagenaryYear 小于 1 或大于 60时，返回一个从 1 到 10 的数字。否则返回 -1 。</returns>public static int GetTerrestrialBranch(int sexagenaryYear){if (sexagenaryYear < 1 && sexagenaryYear > 60){return -1;}return _chineseDateTime.GetTerrestrialBranch(sexagenaryYear);}#endregion#region ====== 24节气 ====================================================================================/// <summary>/// 当前节气，没有则返回空/// </summary>public static string SolarTerm(DateTime dateTime){var i = SolarTermFunc((x, y) => x == y, dateTime, out var dt);return i == -1 ? "" : _solarTerm[i];}/// <summary>/// 上一个节气/// </summary>public static string GetSolarTermPrev(DateTime dateTime){var i = SolarTermFunc((x, y) => x < y, dateTime, out var dt);return i == -1 ? "" : _solarTerm[i];}/// <summary>/// 下一个节气/// </summary>public static string GetSolarTermNext(DateTime dateTime){var i = SolarTermFunc((x, y) => x > y, dateTime, out var dt);return i == -1 ? "" : $"{_solarTerm[i]}";}/// <summary>/// 节气计算（当前年），返回指定条件的节气序及日期（公历）/// </summary>/// <param name="func"></param>/// <param name="dateTime"></param>/// <returns>-1时即没找到</returns>public static int SolarTermFunc(Expression<Func<int, int, bool>> func, DateTime date, out DateTime dateTime){var baseDateAndTime = new DateTime(1900, 1, 6, 2, 5, 0); //#1/6/1900 2:05:00 AM#var year = date.Year;int[] solar = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 };var expressionType = func.Body.NodeType;if (expressionType != ExpressionType.LessThan && expressionType != ExpressionType.LessThanOrEqual &&expressionType != ExpressionType.GreaterThan && expressionType != ExpressionType.GreaterThanOrEqual &&expressionType != ExpressionType.Equal){throw new NotSupportedException("不受支持的操作符");}if (expressionType == ExpressionType.LessThan || expressionType == ExpressionType.LessThanOrEqual){solar = solar.OrderByDescending(x => x).ToArray();}foreach (var item in solar){var num = 525948.76 * (year - 1900) + _solarTermInfo[item - 1];var newDate = baseDateAndTime.AddMinutes(num); //按分钟计算if (func.Compile()(newDate.DayOfYear, date.DayOfYear)){dateTime = newDate;return item - 1;}}dateTime = _chineseDateTime.MinSupportedDateTime;return -1;}#endregion}}
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