单击winforms c#“?按钮时如何一次打印多个crystal报表?

如何更新代码以打印所有三个报告?

代码如下:

private void btnSave_Click(object sender, EventArgs e)
        {

     if (textCashOrder.Text != "")
                        {
                            //print cash request 
                            int order_id = Convert.ToInt32(textCashOrder.Text);

                            RPT.CashOrdersReport report = new RPT.CashOrdersReport();
                            RPT.RPT_TESTS frm = new RPT.RPT_TESTS();
                            report.SetDataSource(order.GetOrderDetailscashForPrint(order_id));
                            report.PrintToPrinter(1, true, 0, 0);
                            report.PrintOptions.PrinterName = "HP DeskJet 3830 series";

                            //print job order 


                            RPT.SampleDetails jobreport = new RPT.SampleDetails();
                            RPT.RPT_TESTS frmjob = new RPT.RPT_TESTS();
                            jobreport.SetDataSource(order.GetsampleDetailsForPrint(order_id));
                            jobreport.PrintToPrinter(1, true, 0, 0);
                            jobreport.PrintOptions.PrinterName = "HP DeskJet 3830 series";

                            //print barcode report 

                            RPT.barcode myreport = new RPT.barcode();
                            myreport.SetParameterValue("@ORDER_ID", textCashOrder.Text);
                            myreport.SetDatabaseLogon("admin", "123123");
                            RPT.RPT_TESTS myform = new RPT.RPT_TESTS();
                            myreport.PrintToPrinter(1, true, 0, 0);
                            myreport.PrintOptions.PrinterName = "HP DeskJet 3830 series";
                        }
}