asp.net List数据源之 repeater分页

asp教程.net list数据源之 repeater分页
*/

///  
  /// 根据当前页码，每页条数，取得相应数据。 
  ///  
  /// 每页显示条数 
  /// 当前页码 
  ///
  public static list getpagesdata(int pagenum, int currentpage)
  {
  list list = new list();
  stringbuilder sb = new stringbuilder();
  sb.append("select top " + pagenum + " * from zjagzm.message where ");
  sb.append("id not in (select top " + pagenum * currentpage + " id from zjagzm.message) order by uptime desc");
  datatable dt = dbhelpersql.getdataset(sb.tostring(), null);
  foreach (datarow row in dt.rows)
  {
  message ms = new message();
  ms.id = convert.toint32(row["id"]);
  ms.name = row["name"].tostring();
  ms.title = row["title"].tostring();
  ms.uptime = convert.todatetime(row["uptime"]);
  ms.contents = row["contents"].tostring();
  list.add(ms);
  }
  return list;

  }