public DataTable layTourTheoNhom(int id)
 {
     return(tourModel.layTourTheoNhom(id));
 }
 public void layTour(int id)
 {
     rptTour.DataSource = tourModel.layTourTheoNhom(id);
     rptTour.DataBind();
     txtTieuDe.InnerHtml = "DANH SÁCH TOUR: " + nhomTourModel.layTenNhomTour(id.ToString());
 }