Question

字符串怎么转换成16进制byte

Answer 1

字符串先转换二进制的在在转换16进制Byte
如下用C#实现的方法
字符转换到二进制方法
private static byte[] strToToHexByte(string hexString)
{
hexString = hexString.Replace(" ", "");
if ((hexString.Length % 2) != 0)
hexString += " ";
byte[] returnBytes = new byte[hexString.Length / 2];
for (int i = 0; i < returnBytes.Length; i++)
returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16);
return returnBytes;
}

二进制方法转换到16进制Byte
public static string byteToHexStr(byte[] bytes)
{
string returnStr = "";
if (bytes != null)
{
for (int i = 0; i < bytes.Length; i++)
{
returnStr += bytes[i].ToString("X2");
}
}
return returnStr;
}

Answer 2

byte[] b = Encoding.ASCII.GetBytes(s);

还是将字符串转成整形，再放到一个byte里面
那就这样：
byte b = Convert.ToByte(s, 16);