//农历转公历
public static bool ToSolar(Lunar_t lunar, ref int y, ref int m, ref int d)
{
int year = lunar.Year,
month = lunar.Month,
day = lunar.Day;
int byNow, xMonth, i;
int spring_solar_m = 0;
int spring_solar_d = 0;
if (!LunarDateCheck(lunar))
{
return(false);
}
LunarSpringDate(year, ref spring_solar_m, ref spring_solar_d);
byNow = spring_solar_d - 1;
if (spring_solar_m == 2)
{
byNow += 31;
}
for (i = 1; i < month; i++)
{
byNow += LunarMonthDays(year, i);
}
byNow += day;
xMonth = LunarLeapMonth(year);
if (xMonth != 0)
{
if (month > xMonth || (month == xMonth && lunar.Is_leap))
{
byNow += LunarLeapMonthDays(year);
}
}
if (byNow > 366 || (year % 4 != 0 && byNow == 365))
{
year += 1;
if (year % 4 == 0)
{
byNow -= 366;
}
else
{
byNow -= 365;
}
}
for (i = 1; i < 13; i++) //这行代码可能有错
{
if (MonthTotal[i] >= byNow)
{
month = i;
break;
}
}
d = byNow - MonthTotal[month - 1];
m = month;
y = year;
return(true);
}
//判断给定的农历日期是否是，在MIN_YEAR年到MAX_YEAR年之间正确的日期
private static bool LunarDateCheck(Lunar_t lunar)
{
int leap = 0;
if ((lunar.Year < MIN_YEAR) || (lunar.Year > MAX_YEAR))
{
return(false);
}
if ((lunar.Month < 1) || (lunar.Month > 12))
{
return(false);
}
if ((lunar.Day < 1) || (lunar.Day > 30)) //农历的月最多有30天
{
return(false);
}
if (LunarMonthDays(lunar.Year, lunar.Month) < lunar.Day)
{
return(false);
}
if (lunar.Is_leap)
{
leap = LunarLeapMonth(lunar.Year);
if (leap == 0)
{
return(false);
}
else if (lunar.Month != leap)
{
return(false);
}
else if (LunarLeapMonthDays(lunar.Year) < lunar.Day)
{
return(false);
}
}
return(true);
}
//公历转农历
public static bool ToLunar(int year, int month, int day, ref Lunar_t lunar)
{
int bySpring, bySolar, daysPerMonth;
int index = 0;
bool flag;
int spring_solar_m = 0;
int spring_solar_d = 0;
if (!SolarDateCheck(year, month, day))
{
return(false);
}
//bySpring 记录春节离当年元旦的天数。
//bySolar 记录阳历日离当年元旦的天数。
LunarSpringDate(year, ref spring_solar_m, ref spring_solar_d);
if (spring_solar_m == 1)
{
bySpring = spring_solar_d - 1;
}
else
{
bySpring = spring_solar_d - 1 + 31;
}
bySolar = MonthTotal[month - 1] + day - 1;
if ((year % 4 == 0) && (month > 2))
{
bySolar++;
}
//daysPerMonth记录大小月的天数 29 或30
//index 记录从哪个月开始来计算。
//flag 是用来对闰月的特殊处理。
//判断阳历日在春节前还是春节后
if (bySolar >= bySpring) //阳历日在春节后（含春节那天）
{
bySolar -= bySpring;
month = 1;
flag = false;
daysPerMonth = LunarMonthDays(year, month);
while (bySolar >= daysPerMonth)
{
bySolar -= daysPerMonth;
if (month == LunarLeapMonth(year))
{
flag = !flag;
if (!flag)
{
month++;
}
}
else
{
month++;
}
index++;
daysPerMonth = LunarMonthDays(year, index);
}
day = bySolar + 1;
}
else
{ //阳历日在春节前
bySpring -= bySolar;
year--;
month = 12;
if (LunarLeapMonth(year) == 0)
{
index = 12;
}
else
{
index = 13;
}
flag = false;
daysPerMonth = LunarMonthDays(year, index);
while (bySpring > daysPerMonth)
{
bySpring -= daysPerMonth;
index--;
if (!flag)
{
month--;
}
if (month == LunarLeapMonth(year))
{
flag = !flag;
}
daysPerMonth = LunarMonthDays(year, index);
}
day = daysPerMonth - bySpring + 1;
}
lunar.Day = day;
lunar.Month = month;
lunar.Year = year;
if (month == LunarLeapMonth(year))
{
lunar.Is_leap = true;
}
else
{
lunar.Is_leap = false;
}
return(true);
}