private void frmXuatThongKeTonKho_Load(object sender, EventArgs e)
        {
            ThongKeTonKho report = new ThongKeTonKho();

            report.SetDataSource(SachCtr.ThongKeTonKho());
            crystalReportViewer1.ReportSource = report;
        }
        public virtual CrystalDecisions.CrystalReports.Engine.ReportDocument CreateReport()
        {
            ThongKeTonKho rpt = new ThongKeTonKho();

            rpt.Site = this.Site;
            return(rpt);
        }