public static string Fill(string pStrSource)

{

switch(pStrSource.Length)

{

case 1:return "0000000" + pStrSource;

case 2:return "000000" + pStrSource;

case 3:return "00000" + pStrSource;

case 4:return "0000" + pStrSource;

case 5:return "000" + pStrSource;

case 6:return "00" + pStrSource;

case 7:return "0" + pStrSource;

default:return pStrSource;

}

} 加上這個函式，然後Convert.toString(b,2)替換成Fill(Convert.toString(b,2))，其他不用改。