55128ht_New/YiSha.Util/YiSha.Util/TKLunarCalendarHelper.cs

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Text;

namespace YiSha.Util
{
    public class TKLunarCalendarHelper
    {
        //C# 获取农历日期

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

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

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

        ///<summary>
        /// 十二生肖
        ///</summary>
        private static string[] 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>
        ///<return s></return s>
        public static string GetLunisolarYear(int year)
        {
            if (year > 3)
            {
                int tgIndex = (year - 4) % 10;
                int dzIndex = (year - 4) % 12;

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

            throw new ArgumentOutOfRangeException("无效的年份!");
        }

        ///<summary>
        /// 农历月
        ///</summary>

        ///<return s></return s>
        private static string[] months = { "正", "二", "三", "四", "五", "六", "七", "八", "九", "十", "十一", "十二" };

        ///<summary>
        /// 农历日
        ///</summary>
        private static string[] days1 = { "初", "十", "廿", "三" };
        ///<summary>
        /// 农历日
        ///</summary>
        private static string[] days = { "一", "二", "三", "四", "五", "六", "七", "八", "九", "十" };
        private static int[] daysInt = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };

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

            throw new ArgumentOutOfRangeException("无效的月份!");
        }

        ///<summary>
        /// 返回农历日
        ///</summary>
        ///<param name="day">天</param>
        ///<return s></return s>
        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("无效的日!");
        }



        ///<summary>
        /// 根据公历获取农历日期
        ///</summary>
        ///<param name="datetime">公历日期</param>
        ///<return s></return s>
        public static string 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--;
                }
                else if (month > leapMonth)
                {
                    month--;
                }
            }

            return string.Concat(isleap ? "闰" : string.Empty, GetLunisolarMonth(month), "月", GetLunisolarDay(day));
        }

        public static bool IsHaveNewYear(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--;
                }
                else if (month > leapMonth)
                {
                    month--;
                }
            }

            if (GetLunisolarMonth(month) != "正")
            {
                return true;
            }
            else
            {
                if (new List<string> { "初一", "初二", "初三", "初四", "初五", "初六", "初七" }.Contains(GetLunisolarDay(day)))
                {
                    return false;
                }
                else
                {
                    return true;
                }
            }
        }

        /// <summary>
        /// 获取除夕日期
        /// </summary>
        /// <param name="year"></param>
        /// <returns></returns>
        public static DateTime GetNewYear(int year)
        {
            DateTime result = new DateTime();
            try
            {
                if (year < 1900 || year > 2100)
                {
                    Exception e = new Exception("参数年份时间不在支持的范围内，支持范围1900~2100年");
                    throw e;
                }
                //摘要：在1月21日-2月20日的31天中，历史上都有做过春节的经历，其中1月21日最少为1次，1月23日、2月6日、2月10日、2月17日最多为7次。
                DateTime t1 = new DateTime(year, 1, 21);
                DateTime t2 = new DateTime(year + 1, 2, 20);
                result = t1;
                ChineseLunisolarCalendar cc = new ChineseLunisolarCalendar();
                int t = t1.CompareTo(t2);
                while (t1.CompareTo(t2) != 0)
                {
                    if (cc.GetMonth(t1) == 1 && cc.GetDayOfMonth(t1) == 1)
                    {
                        result = t1;
                    }
                    t1 = t1.AddDays(1);
                }
                return result;
            }
            catch (Exception err)
            {

            }
            return result;
        }
    }
}