id  code

10  5987
11  34567
12  242
13  43244

id=reader["id"]== DBNull.Value?string.Empty:Convert.ToString(reader["id"]);
                        while ( id.Length<15)
                        {
                            id= " " +id;
                        }
code =reader["code"]== DBNull.Value?string.Empty:Convert.ToString(reader["code"]);
                        while ( code.Length<10)
                        {
                            code = "0" +code;
                        }