private void PrintPurchase_Click(object sender, EventArgs e) { RPT.RPT_FORM frm = new RPT.RPT_FORM(); string I = CLASS_FACTURE.MAXFACTURE(); RPT.Facture raport = new RPT.Facture(); raport.SetParameterValue("@NO_FACTURE", I); frm.crystalReportViewer1.ReportSource = raport; frm.ShowDialog(); txtQtevendu.Clear(); txtarticle.Clear(); txtdesigniation.Clear(); txtprice.Clear(); txtQteStock.Clear(); txtCodeclient.Clear(); txtname.Clear(); txtfirstname.Clear(); txtsold.Clear(); dgvFacture.Rows.Clear(); }