hex string to byte[]
public static byte[] StringToByte1(string value)
{
int len = value.Length / 2;
byte[] ret = new byte[len];
for (int i = 0; i < len; i++)
ret[i] = (byte)Convert.ToInt32(value.Substring(i * 2, 2), 16);
return ret;
}
byte[] to hex string
1、BitConverter.ToString(bytes)，然后把"-"replace掉
2、 public static string ConvertBytesToHex(byte[] value)
{
int num = value.Length;
char[] chArray = new char[num * 2];
int num2 = 0;
for (int index = 0; index < (num * 2); index += 2)
{
byte num5 = value[num2++];
chArray[index] = GetHexValue(num5 / 0x10);
chArray[index + 1] = GetHexValue(num5 % 0x10);
}
return new string(chArray);
}
private static char GetHexValue(int i)
{
if (i < 10)
{
return (char)(i + 0x30);
}
return (char)((i - 10) + 0x41);
}
3、 private static char[] hexDigits = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
internal static string ToHexString(byte[] bytes)
{
int num = bytes.Length;
char[] chars = new char[num * 2];
for (int i = 0; i < num; i++)
{
int b = bytes[i];
chars[i * 2] = hexDigits[b >> 4];
chars[i * 2 + 1] = hexDigits[b & 0xF];
}
return new string(chars);
}
总结，第三种效率最高
