'下面是一个关于VB的农历算法
'日期数据定义方法如下
'前12个字节代表1-12月为大月或是小月，1为大月30天，0为小月29天；
'第13位为闰月的情况，1为大月30天，0为小月29天；
'第14位为闰月的月份，如果不是闰月为0，否则给出月份，10、11、12分别用A、B、C来表示，即使用16进制；
'最后4位为当年家农历新年-即农历1月1日所在公历的日期，如0131代表1月31日。
Function GetChgDate(ByVal vDate As String, ByVal ChgType As 转换方式) As String
Dim vvdate() As String = Split(vDate, "-")
If vvdate(0) > 2011 Or vvdate(0) < 1900 Then
Throw New NotSupportedException("本函数只提供1900年至2011年的日历转换！")
End If
Dim AddMonth, AddDay, AddYear, getDay, i As Integer
Dim RunYue As Boolean
Dim conDate As DateTime
Dim daList(2011) As String
daList(1900) = "010010110110180131"
daList(1901) = "010010101110000219"
daList(1902) = "101001010111000208"
daList(1903) = "010100100110150129"
daList(1904) = "110100100110000216"
daList(1905) = "110110010101000204"
daList(1906) = "011010101010140125"
daList(1907) = "010101101010000213"
daList(1908) = "100110101101000202"
daList(1909) = "010010101110120122"
daList(1910) = "010010101110000210"
daList(1911) = "101001001101160130"
daList(1912) = "101001001101000218"
daList(1913) = "110100100101000206"
daList(1914) = "110101010100150126"
daList(1915) = "101101010101000214"
daList(1916) = "010101101010000204"
daList(1917) = "100101101101020123"
daList(1918) = "100101011011000211"
daList(1919) = "010010011011170201"
daList(1920) = "010010011011000220"
daList(1921) = "101001001011000208"
daList(1922) = "101100100101150128"
daList(1923) = "011010100101000216"
daList(1924) = "011011010100000205"
daList(1925) = "101011011010140124"
daList(1926) = "001010110110000213"
daList(1927) = "100101010111000202"
daList(1928) = "010010010111120123"
daList(1929) = "010010010111000210"
daList(1930) = "011001001011060130"
daList(1931) = "110101001010000217"
daList(1932) = "111010100101000206"
daList(1933) = "011011010100150126"
daList(1934) = "010110101101000214"
daList(1935) = "001010110110000204"
daList(1936) = "100100110111030124"
daList(1937) = "100100101110000211"
daList(1938) = "110010010110170131"
daList(1939) = "110010010101000219"
daList(1940) = "110101001010000208"
daList(1941) = "110110100101060127"
daList(1942) = "101101010101000215"
daList(1943) = "010101101010000205"
daList(1944) = "101010101101140125"
daList(1945) = "001001011101000213"
daList(1946) = "100100101101000202"
daList(1947) = "110010010101120122"
daList(1948) = "101010010101000210"
daList(1949) = "101101001010170129"
daList(1950) = "011011001010000217"
daList(1951) = "101101010101000206"
daList(1952) = "010101011010150127"
daList(1953) = "010011011010000214"
daList(1954) = "101001011011000203"
daList(1955) = "010100101011130124"
daList(1956) = "010100101011000212"
daList(1957) = "101010010101080131"
daList(1958) = "111010010101000218"
daList(1959) = "011010101010000208"
daList(1960) = "101011010101060128"
daList(1961) = "101010110101000215"
daList(1962) = "010010110110000205"
daList(1963) = "101001010111040125"
daList(1964) = "101001010111000213"
daList(1965) = "010100100110000202"
daList(1966) = "111010010011030121"
daList(1967) = "110110010101000209"
daList(1968) = "010110101010170130"
daList(1969) = "010101101010000217"
daList(1970) = "100101101101000206"
daList(1971) = "010010101110150127"
daList(1972) = "010010101101000215"
daList(1973) = "101001001101000203"
daList(1974) = "110100100110140123"
daList(1975) = "110100100101000211"
daList(1976) = "110101010010180131"
daList(1977) = "101101010100000218"
daList(1978) = "101101101010000207"
daList(1979) = "100101101101060128"
daList(1980) = "100101011011000216"
daList(1981) = "010010011011000205"
daList(1982) = "101001001011140125"
daList(1983) = "101001001011000213"
daList(1984) = "1011001001011A0202"
daList(1985) = "011010100101000220"
daList(1986) = "011011010100000209"
daList(1987) = "101011011010060129"
daList(1988) = "101010110110000217"
daList(1989) = "100100110111000206"
daList(1990) = "010010010111150127"
daList(1991) = "010010010111000215"
daList(1992) = "011001001011000204"
daList(1993) = "011010100101030123"
daList(1994) = "111010100101000210"
daList(1995) = "011010110010180131"
daList(1996) = "010110101100000219"
daList(1997) = "101010110110000207"
daList(1998) = "100100110110150128"
daList(1999) = "100100101110000216"
daList(2000) = "110010010110000205"
daList(2001) = "110101001010140124"
daList(2002) = "110101001010000212"
daList(2003) = "110110100101000201"
daList(2004) = "010110101010120122"
daList(2005) = "010101101010000209"
daList(2006) = "101010101101170129"
daList(2007) = "001001011101000218"
daList(2008) = "100100101101000207"
daList(2009) = "110010010101150126"
daList(2010) = "101010010101000214"
daList(2011) = "101101001010000214"
AddYear = vvdate(0)
If ChgType = 转换方式.阴历转阳历 Then
AddMonth = Val(Mid(daList(AddYear), 15, 2))
AddDay = Val(Mid(daList(AddYear), 17, 2))
conDate = DateSerial(AddYear, AddMonth, AddDay)
AddDay = vvdate(2)
For i = 1 To vvdate(1) - 1
AddDay = AddDay + 29 + Val(Mid(daList(vvdate(0)), i, 1))
Next i
Return DateAdd(DateInterval.Day, AddDay - 1, conDate)
Else
CHUSHIHUA:
AddMonth = Val(Mid(daList(AddYear), 15, 2))
AddDay = Val(Mid(daList(AddYear), 17, 2))
conDate = DateSerial(AddYear, AddMonth, AddDay)
Dim vtDate As DateTime
Try
vtDate = CType(vDate, DateTime)
Catch ex As Exception
Throw New NotSupportedException("阳历日期输入错误！")
End Try
getDay = DateDiff(DateInterval.Day, conDate, vtDate)
If getDay < 0 Then AddYear = AddYear - 1 : GoTo CHUSHIHUA
AddDay = 1
AddMonth = 1
For i = 1 To getDay
AddDay = AddDay + 1
If AddDay = 30 + Mid(daList(AddYear), AddMonth, 1) Or (RunYue And AddDay = 30 + Mid(daList(AddYear), 13, 1)) Then
If RunYue = False And AddMonth = Val("&H" & Mid(daList(AddYear), 14, 1)) Then
RunYue = True
Else
RunYue = False
AddMonth = AddMonth + 1
End If
AddDay = 1
End If
Next
Return AddYear & "-" & AddMonth & "-" & AddDay
End If
End Function
Enum 转换方式
阴历转阳历 = 1
阳历转阴历 = 0
End Enum
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