protected void LoadTrangChiTiet(int mabds)
    {
        DataSet   ds  = new DataSet();
        DataTable dt1 = new DataTable();
        DataTable dt2 = new DataTable();

        ds  = dm.BUS_LOAD_CHITIET_SANPHAM(mabds);
        dt1 = ds.Tables[0];
        dt2 = ds.Tables[1];
        // hiển thị nội dung lên tag html
        tieudesp.InnerHtml  = dt1.Rows[0]["tenBDS"].ToString();
        diachisp.InnerHtml  = dt1.Rows[0]["DiaChi"].ToString();
        giasp.InnerHtml     = dt1.Rows[0]["Gia"].ToString();
        noidungsp.InnerHtml = dt1.Rows[0]["NoiDung"].ToString();
        // hiển thị slide
        string slide_html = "";
        int    i          = 0;

        foreach (DataRow dr in dt2.Rows)
        {
            if (i == 0)
            {
                slide_html += "<div class=\"carousel-item active\">";
            }
            else
            {
                slide_html += "<div class=\"carousel-item\">";
            }
            slide_html += "<img src=\"" + dr["hinhanh"].ToString() + "\"/></div>";
            i++;
        }
        slide_html     += "<a href=\"#carousel-slider\" data-slide=\"prev\" class=\"carousel-control-prev\">";
        slide_html     += "<i class=\"fa fa-angle-left slide-arrow\"></i></a>";
        slide_html     += "<a href=\"#carousel-slider\" data-slide=\"next\" class=\"carousel-control-next\">";
        slide_html     += "<i class=\"fa fa-angle-right slide-arrow\"></i></a>";
        slide.InnerHtml = slide_html;
    }