/// <summary>
/// page
/// </summary>
/// <typeparam name="T">model type</typeparam>
/// <param name="pageIndex">page index</param>
/// <param name="pageSize">page size</param>
/// <returns>page result</returns>
public virtual Tuple <int, List <T> > Page <T>(int pageIndex, int pageSize) where T : class
{
IMainDal dal = new MainDal();
return(dal.Page <T>(pageIndex, pageSize));
}