文本转化成十六进制

Byte[] byteArray = System.IO.File.ReadAllBytes( " k:\\photo.jpg " );
StringBuilder HexStringBuffer = new StringBuilder();
foreach ( byte b in byteArray)
{
  HexStringBuffer.Append(b.ToString( " X2 " ) + " " );
}
String hexString = HexStringBuffer.ToString();
hexString = hexString.Trim();