VB.NET的字节校验例子

        校验规则：

        第一个字节与字节“00”异或，结果与第二个字节异或，以此类推，至最后一个字节，并将最后异或结果表达为16进制ASCII字符

        例：

        bn012000000000012008-01-15 20:42:3000c3@@@SO2,0,,BB,;NOx,0,,BB,;烟尘,0,,BB,;动压,0,,BB,;温度,0,,BB,;静压,0,,BB,;O2,0,,BB,;流速,0,;H2O,6.5,;流量,0,;过量空气系数,1,;SO2折算,0,;NOx折算,0,;烟尘折算,0,;SO2排放率,0,;NOx排放率,0,;烟尘排放率,0,;tek

        其校验码为：20

        Dim ChkXor = Encoding.Default.GetBytes(VerifyString)
        Dim len As Integer = ChkXor.Length
        Dim i As Integer
        Dim ChkXorResult = "00"
        Dim curByte As Byte
        For i = 0 To len - 1
        curByte = ChkXor(i)
        If curByte <> 0 Then
        ChkXor(i) = CByte(curByte Xor ChkXorResult)
        End If
        ChkXorResult = ChkXor(i)
        Next i
        Verify = Hex(ChkXorResult)
        End Function