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Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
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MsgBox(DEC_to_HEX(255))
End Sub
Public Function DEC_to_HEX(ByVal Dec As Long) As String
Dim a As String
DEC_to_HEX = ""
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
DEC_to_HEX = a DEC_to_HEX
Dec = Dec \ 16
Loop
End Function
把字符串“12341168C5B7”转换为16进制数存为string型
用shuzi=Convert.ToInt32("12341168C5B7",16)
就ok了。
反之用 shuzi.ToString("X")就行了。
给分！！！
12341168C5B7转换成10进制数就是20014839678391。。
而int32的最大值为2,147,483,647。。所以产生错误。
所以要用int64，它的最大值为9,223,372,036,854,775,807。也就是16位十六进制数0X7FFFFFFFFFFFFFFF。
难道还有比F靠后的数？？？？？？
'此函数用于十进制到二进制
Private Function Bin(Number As Long) As Long
Dim Div_value As String
Do
Div_value = (Number Mod 2) Div_value
Number = Int(Number / 2)
Loop Until Number 2
Bin = Number Div_value
End Function
'此函数用于二进制到十进制
Private Function value_Bin(Number As Long) As Long
Dim Temp_value As Long, Cyc As Long
For Cyc = 0 To Len(Str(Number))
If Cyc = Len(Str(Number)) Then
value_Bin = Temp_value + Val(Mid(Str(Number), Cyc, 1))
Exit For
End If
If Cyc 0 Then Temp_value = (Temp_value + Val(Mid(Str(Number), Cyc, 1))) * 2
Next Cyc
End Function
'====写入以上函数后转值操作：
'十进制到十六进制：Hex(十进制数值)
'十进制到八进制：Oct(十进制数值)
'十进制到二进制：Bin(十进制数值)
'二进制到十进制：value_Bin(二进制数值)
'八进制到十进制：Val("O" 八进制数值)
'十六进制到十进制：Val("H" 十六进制数值)
比如
msgbox DEC_to_BIN(10)
就会返回一个10转换为十进制后的结果
或者简单点就用
VB自带函数：
十进制转八进制：Oct(num)
十六进制转八进制：oct("H" num)
十进制转十六进制：hex(num)
八进制转十六进制：hex("O" num)
十六进制转换为十进制
Dim str As String
str = Text2.Text
Text10.Text = CLng("H" str)
numHex =Integer.Parse(strHex, Globalization.NumberStyles.AllowHexSpecifier)
或
numHex = Integer. Parse("H" strHex)
你不用理解的 只要将要转换的参数传入就可以的了
比如
msgbox DEC_to_BIN(10)
就会返回一个10转换为十进制后的结果
或者简单点就用
VB自带函数：
十进制转八进制：Oct(num)
十六进制转八进制：oct("H" num)
十进制转十六进制：hex(num)
八进制转十六进制：hex("O" num)
十六进制转换为十进制
Dim str As String
str = Text2.Text
Text10.Text = CLng("H" str)
===========================================
' 用途：将十进制转化为二进制
' 输入：Dec(十进制数)
' 输入数据类型：Long
' 输出：DEC_to_BIN(二进制数)
' 输出数据类型：String
' 输入的最大数为2147483647,输出最大数为1111111111111111111111111111111(31个1)
Public Function DEC_to_BIN(Dec As Long) As String
DEC_to_BIN = ""
Do While Dec 0
DEC_to_BIN = Dec Mod 2 DEC_to_BIN
Dec = Dec \ 2
Loop
End Function
' 用途：将二进制转化为十进制
' 输入：Bin(二进制数)
' 输入数据类型：String
' 输出：BIN_to_DEC(十进制数)
' 输出数据类型：Long
' 输入的最大数为1111111111111111111111111111111(31个1),输出最大数为2147483647
Public Function BIN_to_DEC(ByVal Bin As String) As Long
Dim i As Long
For i = 1 To Len(Bin)
BIN_to_DEC = BIN_to_DEC * 2 + Val(Mid(Bin, i, 1))
Next i
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：HEX_to_BIN(二进制数)
' 输出数据类型：String
' 输入的最大数为2147483647个字符
Public Function HEX_to_BIN(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
HEX_to_BIN = 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：BIN_to_HEX(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 BIN_to_HEX(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
BIN_to_HEX = 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：HEX_to_DEC(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 HEX_to_DEC(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
HEX_to_DEC = 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：DEC_to_HEX(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 DEC_to_HEX(Dec As Long) As String
Dim a As String
DEC_to_HEX = ""
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
DEC_to_HEX = a DEC_to_HEX
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：DEC_to_OCT(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 DEC_to_OCT(Dec As Long) As String
DEC_to_OCT = ""
Do While Dec 0
DEC_to_OCT = Dec Mod 8 DEC_to_OCT
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：OCT_to_DEC(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 OCT_to_DEC(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
OCT_to_DEC = 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：BIN_to_OCT(八进制数)
' 输出数据类型：String
' 输入的最大数为2147483647个字符
Public Function BIN_to_OCT(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
BIN_to_OCT = 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：OCT_to_BIN(二进制数)
' 输出数据类型：String
' 输入的最大数为2147483647个字符
Public Function OCT_to_BIN(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
OCT_to_BIN = 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：OCT_to_HEX(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 OCT_to_HEX(ByVal Oct As String) As String
Dim Bin As String
Bin = OCT_to_BIN(Oct)
OCT_to_HEX = BIN_to_HEX(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：HEX_to_OCT(八进制数)
' 输出数据类型：String
' 输入的最大数为2147483647个字符
Public Function HEX_to_OCT(ByVal Hex As String) As String
Dim Bin As String
Hex = UCase(Hex)
Bin = HEX_to_BIN(Hex)
HEX_to_OCT = BIN_to_OCT(Bin)
End Function