/// <summary>
/// get data with paging
/// </summary>
/// <param name="query"></param>
/// <param name="data"></param>
/// <param name="index"></param>
/// <returns></returns>
protected Data page(String query, Data data, String index)
{
dbc = new DBC();
dbc.open();
result = dbc.page(query, data, index);
dbc.close();
dbc = null;
return result;
}
