winform使用ProcessStartInfo打印，默认打印机，选择打印机等方式

Process pr = new Process();

                string filepath = s;
                //string filepath = "D:\\VSWorkspace\\source\\repos\\QCApp\\bin\\Debug\\" + s;
                pr.StartInfo.FileName = filepath;

                pr.StartInfo.CreateNoWindow = true;
                pr.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
                pr.StartInfo.Verb = "PrintTo"; //PrintTo,Print
                pr.StartInfo.Arguments = "\"" + GetPrinter() + "\""; //若直接打印，则注释此行即可
                pr.Start();

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private string GetPrinter()
        {
            var printer = string.Empty;
            var printDialog = new PrintDialog()
            {
                Document = new PrintDocument()
            };
            var dialogRet = printDialog.ShowDialog();
            if (dialogRet == System.Windows.Forms.DialogResult.OK || dialogRet == System.Windows.Forms.DialogResult.Yes)
            {
                printer = printDialog.Document.PrinterSettings.PrinterName;
            }
            return printer;
        }
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