c#实现万年历示例分享 万年历农历查询

using System;

namespace yangliToyinli
{
    #region ChineseCalendarException
    /// <summary>
    /// 中国日历异常处理
    /// </summary>
    public class ChineseCalendarException : System.Exception
    {
        public ChineseCalendarException(string msg)
            : base(msg)
        {
        }
    }

    #endregion

    /// <summary>
    /// 中国农历类 版本V1.0 支持 1900.1.31日起至 2049.12.31日止的数据
    /// </summary>
    /// <remarks>
    /// 本程序使用数据来源于网上的万年历查询，并综合了一些其它数据
    /// </remarks>
    public class ChineseCalendar
    {
        #region 内部结构
        private struct SolarHolidayStruct
        {
            public int Month;
            public int Day;
            public int Recess; //假期长度
            public string HolidayName;
            public SolarHolidayStruct(int month, int day, int recess, string name)
            {
                Month = month;
                Day = day;
                Recess = recess;
                HolidayName = name;
            }
        }

        private struct LunarHolidayStruct
        {
            public int Month;
            public int Day;
            public int Recess;
            public string HolidayName;

            public LunarHolidayStruct(int month, int day, int recess, string name)
            {
                Month = month;
                Day = day;
                Recess = recess;
                HolidayName = name;
            }
        }

        private struct WeekHolidayStruct
        {
            public int Month;
            public int WeekAtMonth;
            public int WeekDay;
            public string HolidayName;

            public WeekHolidayStruct(int month, int weekAtMonth, int weekDay, string name)
            {
                Month = month;
                WeekAtMonth = weekAtMonth;
                WeekDay = weekDay;
                HolidayName = name;
            }
        }
        #endregion

        #region 内部变量
        private DateTime _date;
        private DateTime _datetime;

        private int _cYear;
        private int _cMonth;
        private int _cDay;
        private bool _cIsLeapMonth; //当月是否闰月
        private bool _cIsLeapYear; //当年是否有闰月
        #endregion

        #region 基础数据
        #region 基本常量
        private const int MinYear = 1900;
        private const int MaxYear = 2050;
        private static DateTime MinDay = new DateTime(1900, 1, 30);
        private static DateTime MaxDay = new DateTime(2049, 12, 31);
        private const int GanZhiStartYear = 1864; //干支计算起始年
        private static DateTime GanZhiStartDay = new DateTime(1899, 12, 22);//起始日
        private const string HZNum = "零一二三四五六七八九";
        private const int AnimalStartYear = 1900; //1900年为鼠年
        private static DateTime ChineseConstellationReferDay = new DateTime(2007, 9, 13);//28星宿参考值,本日为角
        #endregion

        #region 阴历数据
        /// <summary>
        /// 来源于网上的农历数据
        /// </summary>
        /// <remarks>
        /// 数据结构如下，共使用17位数据
        /// 第17位：表示闰月天数，0表示29天   1表示30天
        /// 第16位-第5位（共12位）表示12个月，其中第16位表示第一月，如果该月为30天则为1，29天为0
        /// 第4位-第1位（共4位）表示闰月是哪个月，如果当年没有闰月，则置0
        ///</remarks>
   &nbs