protected void XoaBai(int maloai)
        {
            try
            {

                //xac nhan truoc khi xoa
                BUSBaiViet busBaiViet = new BUSBaiViet();
                List<BAIVIET> lstBaiViet = busBaiViet.TimKiemTheoLoaiBaiViet(maloai);
                if (lstBaiViet != null)
                {
                    foreach (BAIVIET bv in lstBaiViet)
                    {
                        BUSTapTinBaiViet busTapTin = new BUSTapTinBaiViet();
                        List<TAPTINBAIVIET> lstTapTin = busTapTin.TimKiemMaBaiViet(bv.MaBaiViet);
                        if (lstTapTin != null)
                        {
                            foreach (TAPTINBAIVIET taptin in lstTapTin)
                            {
                                busTapTin.Xoa(taptin.MaTapTin);
                            }
                        }

                        busBaiViet.Xoa(bv.MaBaiViet);
                    }
                }

                    BUSLoaiBaiViet bus = new BUSLoaiBaiViet();
                    if (bus.Xoa(maloai) == 0)
                    {
                        //Thong bao

                        Response.Redirect("LoaiBaiViet.aspx");
                    }

            }

            catch
            {
            }
        }