项目打印小单，不想弹窗

public class PrintDialogHelper
    {
        private const string PrintServerName = "艹";
        private const string PrintName = "Microsoft XPS Document Writer";

public PrintDialogHelper()
        {
        }

///
        /// 打印控件
        ///
        ///
        public void PrintVisual(FrameworkElement element)
        {
            var printDialog = new PrintDialog();
            SetPrintProperty(printDialog);
            var printQueue = SelectedPrintServer(PrintServerName, PrintName);
            if (printQueue != null)
            {
                printDialog.PrintQueue = printQueue;
                printDialog.PrintVisual(element, "");
            }
        }

public void PrintDocument(DocumentPaginator docuemnt)
        {
            var printDialog = new PrintDialog();
            SetPrintProperty(printDialog);
            var printQueue = SelectedPrintServer(PrintServerName, PrintName);
            if (printQueue != null)
            {
                printDialog.PrintQueue = printQueue;
                printDialog.PrintDocument(docuemnt, "");
            }
        }

///
        /// 查找并获取打印机
        ///
        /// 服务器名字： Lee-pc
        /// 打印机名字：Hp laserjet m1522 mfp series pcl 6
        ///
        public PrintQueue SelectedPrintServer(string printerServerName, string printerName)
        {
            try
            {
                var printers = PrinterSettings.InstalledPrinters;//获取本机上的所有打印机
                PrintServer printServer = null;

foreach (string printer in printers)
                {
                    if (printer.Contains(printerName))
                        printServer = new PrintServer("\\\\" + printerServerName);
                }

if (printServer == null) return null;//没有找到打印机服务器

var printQueue = printServer.GetPrintQueue(printerName);
                return printQueue;
            }
            catch (Exception)
            {
                return null;//没有找到打印机
            }
        }

///
        /// 设置打印格式
        ///
        /// 打印文档
        /// 打印纸张大小 a4
        /// 打印方向 竖向
        public void SetPrintProperty(PrintDialog printDialog, PageMediaSizeName pageSize = PageMediaSizeName.ISOA4, PageOrientation pageOrientation = PageOrientation.Portrait)
        {
            var printTicket = printDialog.PrintTicket;
            printTicket.PageMediaSize = new PageMediaSize(pageSize);//A4纸
            printTicket.PageOrientation = pageOrientation;//默认竖向打印
        }
    }

需引用

System.Printing.dll

reachframework.dll

打印的按钮事件 调用

//需打印窗体，页或控件

var printPage = new frmShopOrderPrintView();

var printdialog = new PrintDialogHelper();
            printdialog.PrintVisual(printPage);
            printPage.ShowDialog();