VB 进制转换大全

'二进制转十进制
Public Function B2D(vBStr As String) As Long
     Dim vLen As Integer  '串长
     Dim vDec As Long     '结果
     Dim vG As Long       '权值
     Dim vI As Long       '位数
     Dim vTmp As String   '临时串
     Dim vN As Long       '中间值

    vLen = Len(vBStr)

    vG = 1 '初始权值
     vDec = 0   '结果初值
     B2D = vDec '返回初值

    For vI = vLen To 1 Step -1
         vTmp = Mid(vBStr, vI, 1) '取出当前位
         vN = Val(vTmp)

        If vN < 2 Then  '判断是不是合法二进制串,貌似不严谨,E文和符号会被判0而合法
             vDec = vDec + vG * vN '得到中间结果
             vG = vG + vG
         Else
             vDec = 0
             'msgbox "不是有效的二进制数",vbokonly
             Exit Function
         End If
    Next vI

    B2D = vDec
End Function

'十进制转二进制
Public Function D2B(Dec As Long) As String
     D2B = ""
     Do While Dec > 0
         D2B = Dec Mod 2 & D2B
         Dec = Dec \ 2
     Loop
End Function

' 用途：将十六进制转化为二进制
' 输入：Hex(十六进制数)
' 输入数据类型：String
' 输出：H2B(二进制数)
' 输出数据类型：String
' 输入的最大数为2147483647个字符
Public Function H2B(ByVal Hex As String) As String
     Dim i As Long
     Dim b As String

    Hex = UCase(Hex)
     For i = 1 To Len(Hex)
         Select Case Mid(Hex, i, 1)
             Case "0": b = b & "0000"
             Case "1": b = b & "0001"
             Case "2": b = b & "0010"
             Case "3": b = b & "0011"
             Case "4": b = b & "0100"
             Case "5": b = b & "0101"
             Case "6": b = b & "0110"
             Case "7": b = b & "0111"
             Case "8": b = b & "1000"
             Case "9": b = b & "1001"
             Case "A": b = b & "1010"
             Case "B": b = b & "1011"
             Case "C": b = b & "1100"
             Case "D": b = b & "1101"
             Case "E": b = b & "1110"
             Case "F": b = b & "1111"
         End Select
     Next i
     While Left(b, 1) = "0"
         b = Right(b, Len(b) - 1)
     Wend
     H2B = b
End Function

' 用途：将二进制转化为十六进制
' 输入：Bin(二进制数)
' 输入数据类型：String
' 输出：B2H(十六进制数)
' 输出数据类型：String
' 输入的最大数为2147483647个字符
Public Function B2H(ByVal Bin As String) As String
     Dim i As Long
     Dim H As String
     If Len(Bin) Mod 4 <> 0 Then
         Bin = String(4 - Len(Bin) Mod 4, "0") & Bin
     End If

    For i = 1 To Len(Bin) Step 4
         Select Case Mid(Bin, i, 4)
             Case "0000": H = H & "0"
             Case "0001": H = H & "1"
             Case "0010": H = H & "2"
             Case "0011": H = H & "3"
             Case "0100": H = H & "4"
             Case "0101": H = H & "5"
             Case "0110": H = H & "6"
             Case "0111": H = H & "7"
             Case "1000": H = H & "8"
             Case "1001": H = H & "9"
             Case "1010": H = H & "A"
             Case "1011": H = H & "B"
             Case "1100": H = H & "C"
             Case "1101": H = H & "D"
             Case "1110": H = H & "E"
             Case "1111": H = H & "F"
         End Select
     Next i
     While Left(H, 1) = "0"
         H = Right(H, Len(H) - 1)
     Wend
     B2H = H
End Function

' 用途：将十六进制转化为十进制
' 输入：Hex(十六进制数)
' 输入数据类型：String
' 输出：H2D(十进制数)
' 输出数据类型：Long
' 输入的最大数为7FFFFFFF,输出的最大数为2147483647
Public Function H2D(ByVal Hex As String) As Long
     Dim i As Long
     Dim b As Long

    Hex = UCase(Hex)
     For i = 1 To Len(Hex)
         Select Case Mid(Hex, Len(Hex) - i + 1, 1)
             Case "0": b = b + 16 ^ (i - 1) * 0
             Case "1": b = b + 16 ^ (i - 1) * 1
             Case "2": b = b + 16 ^ (i - 1) * 2
             Case "3": b = b + 16 ^ (i - 1) * 3
             Case "4": b = b + 16 ^ (i - 1) * 4
             Case "5": b = b + 16 ^ (i - 1) * 5
             Case "6": b = b + 16 ^ (i - 1) * 6
             Case "7": b = b + 16 ^ (i - 1) * 7
             Case "8": b = b + 16 ^ (i - 1) * 8
             Case "9": b = b + 16 ^ (i - 1) * 9
             Case "A": b = b + 16 ^ (i - 1) * 10
             Case "B": b = b + 16 ^ (i - 1) * 11
             Case "C": b = b + 16 ^ (i - 1) * 12
             Case "D": b = b + 16 ^ (i - 1) * 13
             Case "E": b = b + 16 ^ (i - 1) * 14
             Case "F": b = b + 16 ^ (i - 1) * 15
         End Select
     Next i
     H2D = b
End Function

' 用途：将十进制转化为十六进制
' 输入：Dec(十进制数)
' 输入数据类型：Long
' 输出：D2H(十六进制数)
' 输出数据类型：String
' 输入的最大数为2147483647,输出最大数为7FFFFFFF
Public Function D2H(Dec As Long) As String
     Dim a As String
     D2H = ""
     Do While Dec > 0
         a = CStr(Dec Mod 16)
         Select Case a
             Case "10": a = "A"
             Case "11": a = "B"
             Case "12": a = "C"
             Case "13": a = "D"
             Case "14": a = "E"
             Case "15": a = "F"
         End Select
         D2H = a & D2H
         Dec = Dec \ 16
     Loop
End Function

' 用途：将十进制转化为八进制
' 输入：Dec(十进制数)
' 输入数据类型：Long
' 输出：D2O(八进制数)
' 输出数据类型：String
' 输入的最大数为2147483647,输出最大数为17777777777
Public Function D2O(Dec As Long) As String
     D2O = ""
     Do While Dec > 0
         D2O = Dec Mod 8 & D2O
         Dec = Dec \ 8
     Loop
End Function

' 用途：将八进制转化为十进制
' 输入：Oct(八进制数)
' 输入数据类型：String
' 输出：O2D(十进制数)
' 输出数据类型：Long
' 输入的最大数为17777777777,输出的最大数为2147483647
Public Function O2D(ByVal Oct As String) As Long
     Dim i As Long
     Dim b As Long

    For i = 1 To Len(Oct)
         Select Case Mid(Oct, Len(Oct) - i + 1, 1)
             Case "0": b = b + 8 ^ (i - 1) * 0
             Case "1": b = b + 8 ^ (i - 1) * 1
             Case "2": b = b + 8 ^ (i - 1) * 2
             Case "3": b = b + 8 ^ (i - 1) * 3
             Case "4": b = b + 8 ^ (i - 1) * 4
             Case "5": b = b + 8 ^ (i - 1) * 5
             Case "6": b = b + 8 ^ (i - 1) * 6
             Case "7": b = b + 8 ^ (i - 1) * 7
         End Select
     Next i
     O2D = b
End Function

' 用途：将二进制转化为八进制
' 输入：Bin(二进制数)
' 输入数据类型：String
' 输出：B2O(八进制数)
' 输出数据类型：String
' 输入的最大数为2147483647个字符
Public Function B2O(ByVal Bin As String) As String
     Dim i As Long
     Dim H As String
     If Len(Bin) Mod 3 <> 0 Then
         Bin = String(3 - Len(Bin) Mod 3, "0") & Bin
     End If

    For i = 1 To Len(Bin) Step 3
         Select Case Mid(Bin, i, 3)
             Case "000": H = H & "0"
             Case "001": H = H & "1"
             Case "010": H = H & "2"
             Case "011": H = H & "3"
             Case "100": H = H & "4"
             Case "101": H = H & "5"
             Case "110": H = H & "6"
             Case "111": H = H & "7"
         End Select
     Next i
     While Left(H, 1) = "0"
         H = Right(H, Len(H) - 1)
     Wend
     B2O = H
End Function

' 用途：将八进制转化为二进制
' 输入：Oct(八进制数)
' 输入数据类型：String
' 输出：O2B(二进制数)
' 输出数据类型：String
' 输入的最大数为2147483647个字符
Public Function O2B(ByVal Oct As String) As String
     Dim i As Long
     Dim b As String

    For i = 1 To Len(Oct)
         Select Case Mid(Oct, i, 1)
             Case "0": b = b & "000"
             Case "1": b = b & "001"
             Case "2": b = b & "010"
             Case "3": b = b & "011"
             Case "4": b = b & "100"
             Case "5": b = b & "101"
             Case "6": b = b & "110"
             Case "7": b = b & "111"
         End Select
     Next i
     While Left(b, 1) = "0"
         b = Right(b, Len(b) - 1)
     Wend
     O2B = b
End Function

' 用途：将八进制转化为十六进制
' 输入：Oct(八进制数)
' 输入数据类型：String
' 输出：O2H(十六进制数)
' 输出数据类型：String
' 输入的最大数为2147483647个字符
Public Function O2H(ByVal Oct As String) As String
     Dim Bin As String
     Bin = O2B(Oct)
     O2H = B2H(Bin)
End Function

' 用途：将十六进制转化为八进制
' 输入：Hex(十六进制数)
' 输入数据类型：String
' 输出：H2O(八进制数)
' 输出数据类型：String
' 输入的最大数为2147483647个字符
Public Function H2O(ByVal Hex As String) As String
     Dim Bin As String
     Hex = UCase(Hex)
     Bin = H2B(Hex)
     H2O = B2O(Bin)
End Function

'====================================================

'16进制转ASC
Function H2A(InputData As String) As String
  Dim mydata
  mydata = Chr(Val("&H" & InputData))
  H2A = mydata
  Exit Function
End Function

'10进制长整数转4位16进制字符串
Function S2H(Num As Long) As String
Dim mynum As String
mynum = Hex(Num)
If Len(mynum) = 1 Then mynum = "000" + mynum
If Len(mynum) = 2 Then mynum = "00" + mynum
If Len(mynum) = 3 Then mynum = "0" + Left(mynum, 2) + Right(mynum, 1)
If Len(mynum) = 4 Then mynum = Right(mynum, 2) + Left(mynum, 2)
S2H = mynum
End Function

'10进制长整数转2位16进制字符串
Function S2H2(Num As Long) As String
Dim mynum As String
mynum = Hex(Num)
If Len(mynum) = 1 Then mynum = "0" + mynum
S2H2 = mynum
End Function

'ASCII字符串转16进制字符串
Public Function A2H(str As String) As String
Dim strlen As Integer
Dim i As Integer
Dim mystr As String
mystr = ""
strlen = Len(str)
For i = 1 To strlen Step 1
mystr = mystr + Hex$(Asc(Mid(str, i, 1)))
Next i
A2H = mystr
End Function

'=====================================================
'进制反转
'=====================================================

'反16进制数转10进制数，共8位
Function FHexToInt(ByVal str As String) As String
    Dim text1 As String
    text1 = str
    Dim text2 As String
    text2 = Mid(text1, 7, 2)
    Dim text3 As String
    text3 = Mid(text1, 5, 2)
    Dim text4 As String
    text4 = Mid(text1, 3, 2)
    Dim text5 As String
    text5 = Mid(text1, 1, 2)
    FHexToInt = Val("&H" & text2 & text3 & text4 & text5)
    Exit Function
End Function
'反16进制数转10进制数，共6位
Function FHexToInt6(ByVal str As String) As String
    Dim text1 As String
    text1 = str
    Dim text2 As String
    text2 = Mid(text1, 5, 2)
    Dim text4 As String
    text3 = Mid(text1, 3, 2)
    Dim text5 As String
    text4 = Mid(text1, 1, 2)
    FHexToInt6 = Val("&H" & text2 & text3 & text4)
    Exit Function
End Function

'反16进制数转10进制数，共4位
Function FHexToInt4(ByVal str As String) As String
    Dim text1 As String
    text1 = str
    Dim text2 As String
    text2 = Mid(text1, 3, 2)
    Dim text4 As String
    text3 = Mid(text1, 1, 2)
    FHexToInt4 = Val("&H" & text2 & text3)
    Exit Function
End Function

'10进制数转反16进制数，共8位
Function IntToFHex(ByVal nums As Long) As String
    Dim text1 As String
    'text1 = Convert.ToString(nums, &H10)
    text1 = O2H(nums)
    If (Len(text1) = 1) Then
        text1 = ("0000000" & text1)
    End If
    If (Len(text1) = 2) Then
        text1 = ("000000" & text1)
    End If
    If (Len(text1) = 3) Then
        text1 = ("00000" & text1)
    End If
    If (Len(text1) = 4) Then
        text1 = ("0000" & text1)
    End If
    If (Len(text1) = 5) Then
        text1 = ("000" & text1)
    End If
    If (Len(text1) = 6) Then
        text1 = ("00" & text1)
    End If
    If (Len(text1) = 7) Then
        text1 = ("0" & text1)
    End If
    Dim text2 As String
    text2 = Mid(text1, 7, 2)
    Dim text3 As String
    text3 = Mid(text1, 5, 2)
    Dim text4 As String
    text4 = Mid(text1, 3, 2)
    Dim text5 As String
    text5 = Mid(text1, 1, 2)
    IntToFHex = text2 & text3 & text4 & text5
    Exit Function
End Function
'10进制数转反16进制数，共6位
Function IntToFHex6(ByVal nums As Long) As String
    Dim text1 As String
    text1 = O2H(nums)
    If (Len(text1) = 1) Then
        text1 = ("00000" & text1)
    End If
    If (Len(text1) = 2) Then
        text1 = ("0000" & text1)
    End If
    If (Len(text1) = 3) Then
        text1 = ("000" & text1)
    End If
    If (Len(text1) = 4) Then
        text1 = ("00" & text1)
    End If
    If (Len(text1) = 5) Then
        text1 = ("0" & text1)
    End If
    Dim text2 As String
    text2 = Mid(text1, 5, 2)
    Dim text3 As String
    text3 = Mid(text1, 3, 2)
    Dim text4 As String
    text4 = Mid(text1, 1, 2)
    IntToFHex6 = text2 & text3 & text4
    Exit Function
End Function

'10进制数转反16进制数，共4位
Function IntToFHex4(ByVal nums As Long) As String
    Dim text1 As String
    text1 = O2H(nums)
    If (Len(text1) = 1) Then
        text1 = ("000" & text1)
    End If
    If (Len(text1) = 2) Then
        text1 = ("00" & text1)
    End If
    If (Len(text1) = 3) Then
        text1 = ("0" & text1)
    End If
    Dim text2 As String
    text2 = Mid(text1, 3, 2)
    Dim text3 As String
    text3 = Mid(text1, 1, 2)
    IntToFHex4 = text2 & text3
    Exit Function
End Function

'==========================================

Public Function B2S(ByVal str As Byte)
    strto = ""
    For i = 1 To LenB(str)
       If AscB(MidB(str, i, 1)) > 127 Then
           strto = strto & Chr(AscB(MidB(str, i, 1)) * 256 + AscB(MidB(str, i + 1, 1)))
           i = i + 1
       Else
           strto = strto & Chr(AscB(MidB(str, i, 1)))
       End If
    Next
    B2S = strto
End Function

Public Function V2H(ByVal sHex As String, Optional bUnicode As Boolean)
    Dim sByte As Variant
    Dim byChar() As Byte
    Dim i As Long
    sHex = Replace(sHex, vbCrLf, "")
    sByte = Split(sHex, " ")
    ReDim byChar(0 To UBound(sByte)) As Byte
    For i = 0 To UBound(sByte)
        byChar(i) = Val("&h" & sByte(i))
    Next
    If bUnicode Then
        V2H = byChar
    Else
        V2H = StrConv(byChar, vbUnicode)
    End If
End Function

'记录集转二进制流

Public Function R2B(rs As Recordset) As Variant              '记录集转换为二进制数据
    Dim objStream As Stream
    Set objStream = New Stream
    objStream.Open
    objStream.Type = adTypeBinary
    rs.Save objStream, adPersistADTG
    objStream.Position = 0
    R2B = objStream.Read()
    Set objStream = Nothing
End Function

'ASCII码转二进制流

Public Function A2B(str As String) As Variant
   Dim a() As Byte, s As String
   s = str
   a = StrConv(s, vbFromUnicode) '字符串转换为byte型 'a 是byte数组，你可以在程序中调用 ，但不能在textbox中显示。
   A2B = a
End Function

'二进制流转ASCII码

Public Function B2A(vData As Variant) As String
   Dim s As String
   s = StrConv(vData, vbUnicode) 'byte型转换为字符串
   B2A = s
End Function