private void FilGVDanhSachLichChieu()
{
SuatChieuBUS SuatChieuBUS = new SuatChieuBUS();
gvDanhSachLichChieu.DataSource = SuatChieuBUS.LayDanhSach();
gvDanhSachLichChieu.DataBind();
PhimBUS phimBUS = new PhimBUS();
ddl_maphim.DataSource = phimBUS.LayDanhSachIDPhim();
ddl_maphim.DataBind();
PhongChieuBUS phongChieuBUS = new PhongChieuBUS();
ddl_maphongchieu.DataSource = phongChieuBUS.LayDanhSachMaPhongChieu();
ddl_maphongchieu.DataBind();
}