public void Preview_btn_Click(object sender, EventArgs e) { _view = (InvoiceForm)((Button)sender).FindForm(); _view.Preview(SAddress.get(sales_order.getSAddress(_view.GetText())), client.get(contract.getClient(sales_order.getSAddress(_view.GetText()))), franchisee.get(contract.getFranchisee(sales_order.getSAddress(_view.GetText())))); }