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

            rpt.Site = this.Site;
            return(rpt);
        }
        private void crystalReportViewer1_Load(object sender, System.EventArgs e)
        {
            ReporteVentas reporte = new ReporteVentas();

            reporte.SetDataSource(ListaVentas);
            crystalReportViewer1.ReportSource = reporte;
            reporte.Refresh();
        }