public virtual CrystalDecisions.CrystalReports.Engine.ReportDocument CreateReport()
        {
            XuatHoaDon rpt = new XuatHoaDon();

            rpt.Site = this.Site;
            return(rpt);
        }
        private void frmXuatHoaDon_Load(object sender, EventArgs e)
        {
            XuatHoaDon report = new XuatHoaDon();

            report.SetDataSource(HoaDonCtr.XuatHoaDon(mahd));
            crtpvXuatHoaDon.ReportSource = report;
        }