第四课 使用SqlDataReader读取数据(翻译)

                               while (rdr.Read())

                               {

                                      // get the results of each column

                                      string contact = (string)rdr["ContactName"];

                                      string company = (string)rdr["CompanyName"];

                                      string city    = (string)rdr["City"];

                                      // print out the results

                                      Console.Write("{0,-25}", contact);

                                      Console.Write("{0,-20}", city);

                                      Console.Write("{0,-25}", company);

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