[英]Works in VB.NET but not in C# - byte conversion
因此,我正在將某些代碼從VB.NET遷移到C#,但是當它在C#中執行字節解析時,它將失敗。
這是VB.NET代碼可以使用的代碼:
Dim sModifiedAccountNumber_AsciiHex
Dim iByte As Byte = 0
Dim iIdx As Integer = 0
Dim strByte As String = String.Empty
sModifiedAccountNumber_AsciiHex = "FC13"
For iIdx = 1 To 3 Step 2
iByte = CByte("&H" & Mid$(sModifiedAccountNumber_AsciiHex, iIdx, 2))
If iByte >= 120 And iByte <= 127 Then
iByte = iByte Or &H80
strByte = Hex$(iByte)
Do While Len(strByte) < 2
strByte = "0" & strByte
Loop
Mid$(sModifiedAccountNumber_AsciiHex, iIdx, 2) = strByte
End If
Next
C#版本:
string modAccountNumberAsciiHex = "FC13";
byte iByte;
string strByte = string.Empty;
for (int iIdx = 1; iIdx <= 3; iIdx += 2)
{
iByte = byte.Parse(("&H" + modAccountNumberAsciiHex.Substring((iIdx - 1), 2)));
if (iByte >= 120 && iByte <= 127)
{
iByte = iByte |= 0x80;
strByte = BitConverter.ToString(new byte[] { iByte });
while (strByte.Length < 2)
{
strByte = "0" + strByte;
}
// TODO: convert the line below to C#
// Mid$(sModifiedAccountNumber_AsciiHex, iIdx, 2) = strByte
}
}
所以在C#中,執行byte.Parse
(for語句后的直線)時總是會收到FormatException
關於在C#中應該有什么想法?
另外-TODO注釋中的C#版本也將不勝感激:-)
錯誤是在字符串的開頭包含“&H”, 並使用byte.Parse
而不指定NumberStyles.AllowHexSpecifier
。 使用Convert.ToByte
會更簡單:
byte x = Convert.ToByte(modAccountNumberAsciiHex.Substring(iIdx - 1, 2), 16)
另請注意,您的代碼當前非常基於“ 1”。 感覺就像移植了VB。 更慣用的C#將是:
for (int index = 0; index < 3; index += 2)
{
byte x = Convert.ToByte(text.Substring(index, 2), 16);
...
}
您無需在C#中包含“&H”:
byte.Parse((modAccountNumberAsciiHex.Substring((iIdx - 1), 2)));
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