protected bool CreateChange() { if (!DataOk()) { return(false); } // DateTime myDate = (DateTime)rddpInvoiceDate.SelectedDate; string reason = txtReason.Text; // create amendment invoice aInv = CntAriCli.CreateAmendmentInvoice(inv, myDate, reason, ctx); if (aInv == null) { lblMessage.Text = "No se ha podido crear la factura rectificativa, seguramente ya se ha generado otra contra esta factura"; return(false); } return(true); }