Convert string to binary zeros and ones [duplicate]

Answer 1

Something like this ought to do you;

static string bytes2bin( byte[] bytes )
{
  StringBuilder buffer = new StringBuilder(bytes.Length*8) ;
  foreach ( byte b in bytes )
  {
    buffer.Append(lookup[b]) ;
  }
  string binary = buffer.ToString() ;
  return binary ;
}

static readonly string[] lookup = InitLookup() ;
private static string[] InitLookup()
{
  string[] instance = new string[1+byte.MaxValue] ;
  StringBuilder buffer = new StringBuilder("00000000") ;
  for ( int i = 0 ; i < instance.Length ; ++i )
  {

    buffer[0] = (char)( '0' + ((i>>7)&1) ) ;
    buffer[1] = (char)( '0' + ((i>>6)&1) ) ;
    buffer[2] = (char)( '0' + ((i>>5)&1) ) ;
    buffer[3] = (char)( '0' + ((i>>4)&1) ) ;
    buffer[4] = (char)( '0' + ((i>>3)&1) ) ;
    buffer[5] = (char)( '0' + ((i>>2)&1) ) ;
    buffer[6] = (char)( '0' + ((i>>1)&1) ) ;
    buffer[7] = (char)( '0' + ((i>>0)&1) ) ;

    instance[i] = buffer.ToString() ;
  }
  return instance ;
}