C# - 打印 PDF 错误（System.ComponentModel.Win32Exception:...）

Question

I am trying to write an application to print PDFs. Now I get an error message where I can't get any further after a long search.

The goal would be to print a PDF file without opening the PDF-Reader.

My Code:

using System.Diagnostics;



private void button1_Click(object sender, EventArgs e)
        {
            ProcessStartInfo info = new ProcessStartInfo();
            info.Verb = "print";
            info.FileName = @"C:\testFile.pdf";
            info.CreateNoWindow = true;
            info.WindowStyle = ProcessWindowStyle.Hidden;

            Process p = new Process();
            p.StartInfo = info;
            p.Start();

            p.WaitForInputIdle();
            System.Threading.Thread.Sleep(3000);
            if (false == p.CloseMainWindow())
                p.Kill();
        }

The error condition occurs at p.Start(); line.

Error message:

System.ComponentModel.Win32Exception: "The system cannot find the specified file".

New experience: 20.01.2021

If I comment out info.Verb = "print"; . Then the PDF is opened. Is this a sign that it finds the PDF but has no access to printer?

Answer 1

use this code it works for me:

    public static void PrintToASpecificPirnter()
    {
        using (PrintDialog printDialog = new PrintDialog())
        {
            if (printDialog.ShowDialog() == DialogResult.OK)
            {
                var StartInfo = new ProcessStartInfo();
                StartInfo.CreateNoWindow = true;
                StartInfo.UseShellExecute = true;
                StartInfo.Verb = "printTo";
                StartInfo.Arguments = "\"" + printDialog.PrinterSettings.PrinterName + "\"";
                StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
                StartInfo.FileName = fileName;

                Process.Start(StartInfo);
            }
        }
    }