公历转农历
public static class ChineseCalendarHelper
{
public static string GetYear(DateTime time)
{
StringBuilder sb = new StringBuilder();
int year = calendar.GetYear(time);
int d;
do
{
d = year % 10;
sb.Insert(0, ChineseNumber[d]);
year = year / 10;
} while (year > 0);
return sb.ToString();
}
public static string GetMonth(DateTime time)
{
int month = calendar.GetMonth(time);
int year = calendar.GetYear(time);
int leap = 0;
//正月不可能闰月
for (int i = 3; i <= month; i++)
{
if (calendar.IsLeapMonth(year, i))
{
leap = i;
break; //一年中最多有一个闰月
}
}
if (leap > 0) month--;
return (leap == month + 1 ? "闰" : "") + ChineseMonthName[month - 1];
}
public static string GetDay(DateTime time)
{
return ChineseDayName[calendar.GetDayOfMonth(time) - 1];
}
public static string GetStemBranch(DateTime time)
{
int sexagenaryYear = calendar.GetSexagenaryYear(time);
string stemBranch = CelestialStem.Substring((sexagenaryYear - 1) % 10, 1) + TerrestrialBranch.Substring((sexagenaryYear - 1) % 12, 1);
return stemBranch;
}
private static ChineseLunisolarCalendar calendar = new ChineseLunisolarCalendar();
private static string ChineseNumber = "〇一二三四五六七八九";
public const string CelestialStem = "甲乙丙丁戊己庚辛壬癸";
public const string TerrestrialBranch = "子丑寅卯辰巳午未申酉戌亥";
public static readonly string[] ChineseDayName = new string[] {
"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[] ChineseMonthName = new string[] { "正", "二", "三", "四", "五", "六", "七", "八", "九", "十", "十一", "十二" };
}
///<summary>
///农历格式化类
///</summary>
public class ChineseCalendarFormatter : IFormatProvider, ICustomFormatter
{
//实现IFormatProvider
public object GetFormat(Type formatType)
{
if (formatType == typeof(ICustomFormatter))
return this;
else
return Thread.CurrentThread.CurrentCulture.GetFormat(formatType);
}
//实现ICustomFormatter
public string Format(string format, object arg, IFormatProvider formatProvider)
{
string s;
IFormattable formattable = arg as IFormattable;
if (formattable == null)
s = arg.ToString();
else
s = formattable.ToString(format, formatProvider);
if (arg.GetType() == typeof(DateTime))
{
DateTime time = (DateTime)arg;
switch (format)
{
case "D": //长日期格式
s = String.Format("{0}年{1}月{2}",
ChineseCalendarHelper.GetYear(time),
ChineseCalendarHelper.GetMonth(time),
ChineseCalendarHelper.GetDay(time));
break;
case "d": //短日期格式
s = String.Format("{0}年{1}月{2}", ChineseCalendarHelper.GetStemBranch(time),
ChineseCalendarHelper.GetMonth(time),
ChineseCalendarHelper.GetDay(time));
break;
case "M": //月日格式
s = String.Format("{0}月{1}", ChineseCalendarHelper.GetMonth(time),
ChineseCalendarHelper.GetDay(time));
break;
case "Y": //年月格式
s = String.Format("{0}年{1}月", ChineseCalendarHelper.GetYear(time),
ChineseCalendarHelper.GetMonth(time));
break;
default:
s = String.Format("{0}年{1}月{2}", ChineseCalendarHelper.GetYear(time),
ChineseCalendarHelper.GetMonth(time),
ChineseCalendarHelper.GetDay(time));
break;
}
}
return s;
}
}
客户端
string litCurrentDate= "(农历" + String.Format(new ChineseCalendarFormatter(), "{0:d}", DateTime.Today) + ")";
