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Public Function dec_to_hex(dec As Long) As String
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Dim a As String
dec_to_hex = ""
Do While dec 0
a = CStr(dec Mod 16)
Select Case a
Case "0": a = "30H"
Case "1": a = "31H"
Case "2": a = "32H"
Case "3": a = "33H"
Case "4": a = "34H"
Case "5": a = "35H"
Case "6": a = "36H"
Case "7": a = "37H"
Case "8": a = "38H"
Case "9": a = "30H"
Case "10": a = "65H"
Case "11": a = "66H"
Case "12": a = "67H"
Case "13": a = "68H"
Case "14": a = "69H"
Case "15": a = "70H"
End Select
dec_to_hex = a " " dec_to_hex
dec = dec \ 16
Loop
End Function
Dim s As String = "h" Hex(Asc(Val(InputBox("输入数值", "提示", 1))))
MsgBox(s)
VB.Net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:CLng("H" num)
下面代码就是将文本框中以一个空格隔开的十六进制转为字节的代码,文本框中数字格式为:01 02 03
Dim TestArray() As String = Split(TextBox1.Text)
Dim hexBytes() As Byte
ReDim hexBytes(TestArray.Length - 1)
Dim i As Integer
For i = 0 To TestArray.Length - 1
hexBytes(i) = Val("h" TestArray(i))
Next
SerialPort.Write(hexBytes, 0, hexBytes.Length)