驱动打印

 public void DrivePrint(string filePath)
        {
            string pdfPath = filePath;
            System.Drawing.Printing.PrintDocument pd = new System.Drawing.Printing.PrintDocument();
            Process processInstance = new Process();
            ProcessStartInfo startInfo = new ProcessStartInfo();
            startInfo.UseShellExecute = true;
            startInfo.Verb = "Print";
            startInfo.CreateNoWindow = true;
            startInfo.WindowStyle = ProcessWindowStyle.Hidden;
            startInfo.Arguments = @"/p /h \" + pdfPath + "\" \"" + pd.PrinterSettings.PrinterName + " \"";
            startInfo.FileName = pdfPath;
            processInstance.StartInfo = startInfo;
            processInstance.Start();
            processInstance.CloseMainWindow();
        }