Jak wydrukować plik PDF bez okna dialogowego w języku C#

The Importance of Direct PDF Printing

When working with PDFs, printing is a fundamental requirement. Printing PDFs directly from a C# application without presenting a print dialog offers several advantages. It enhances user experience by eliminating unnecessary interaction, automates printing tasks, and enables seamless integration into larger workflows. IronPDF streamlines this process, allowing developers to maintain control over the printing process while ensuring the integrity of the printed output.

Importing IronPdf Namespace

The code begins by importing the IronPdf and System.Drawing.Printing namespaces, which allow the use of classes and methods from the IronPDF library, and drawing and printing options from the System namespace.

using IronPdf;
using System.Drawing.Printing;

using IronPdf;
using System.Drawing.Printing;

Imports IronPdf
Imports System.Drawing.Printing

Creating PDF Document with ChromePdfRenderer

The ChromePdfRenderer is responsible for rendering the web page. The PdfDocument class represents the PDF document and provides methods to perform various operations on it, including printing. The following code generates a PDF file from the IronPDF website URL (https://ironpdf.com/):

// Initialize the ChromePdfRenderer which is used to convert URLs to PDFs
ChromePdfRenderer renderer = new ChromePdfRenderer();

// Create a PdfDocument by rendering a specified URL as a PDF
PdfDocument pdfDocument = renderer.RenderUrlAsPdf("https://ironpdf.com/");

// Initialize the ChromePdfRenderer which is used to convert URLs to PDFs
ChromePdfRenderer renderer = new ChromePdfRenderer();

// Create a PdfDocument by rendering a specified URL as a PDF
PdfDocument pdfDocument = renderer.RenderUrlAsPdf("https://ironpdf.com/");

' Initialize the ChromePdfRenderer which is used to convert URLs to PDFs
Dim renderer As New ChromePdfRenderer()

' Create a PdfDocument by rendering a specified URL as a PDF
Dim pdfDocument As PdfDocument = renderer.RenderUrlAsPdf("https://ironpdf.com/")

In the above code sample, the first line initializes an instance of ChromePdfRenderer from the IronPDF library, responsible for converting web pages to PDF format. The second line uses this instance to create a PdfDocument by rendering content from a specified URL, enabling further PDF-related actions.

Print PDF Files without Dialog

// Initiate the printing process for the PdfDocument
pdfDocument.Print(300, "Microsoft Print to PDF", "files/printedfile1.pdf");

// Initiate the printing process for the PdfDocument
pdfDocument.Print(300, "Microsoft Print to PDF", "files/printedfile1.pdf");

' Initiate the printing process for the PdfDocument
pdfDocument.Print(300, "Microsoft Print to PDF", "files/printedfile1.pdf")

The above line of code initiates the printing process for the PdfDocument using the specified print resolution (DPI), sending it to the "Microsoft Print to PDF" printer, which is normally the default printer if no printer is installed, and saving the printed output as a PDF file named "printedfile1.pdf" in the files directory. You can change the printer name and file location as per your needs.

The PDF file is printed pixel-perfect:

Output image of the PDF file named "printedfile1.pdf"

Silent Printing with Advanced Printing Options

To have more control over printing PDF files programmatically, have a look at the following code snippet with advanced options:

using (var printDocument = pdfDocument.GetPrintDocument())
{
    // Set the printer name to "Microsoft Print to PDF"
    printDocument.PrinterSettings.PrinterName = "Microsoft Print to PDF";
    // Specify the file name for the printed document
    printDocument.PrinterSettings.PrintFileName = "files/printedfile2.pdf";
    // Enable printing to file
    printDocument.PrinterSettings.PrintToFile = true;
    // Set custom printer resolution
    printDocument.DefaultPageSettings.PrinterResolution = new PrinterResolution
    {
        Kind = PrinterResolutionKind.Custom,
        X = 1200,
        Y = 1200
    };

    // Initiate the print process
    printDocument.Print();
}

using (var printDocument = pdfDocument.GetPrintDocument())
{
    // Set the printer name to "Microsoft Print to PDF"
    printDocument.PrinterSettings.PrinterName = "Microsoft Print to PDF";
    // Specify the file name for the printed document
    printDocument.PrinterSettings.PrintFileName = "files/printedfile2.pdf";
    // Enable printing to file
    printDocument.PrinterSettings.PrintToFile = true;
    // Set custom printer resolution
    printDocument.DefaultPageSettings.PrinterResolution = new PrinterResolution
    {
        Kind = PrinterResolutionKind.Custom,
        X = 1200,
        Y = 1200
    };

    // Initiate the print process
    printDocument.Print();
}

Using printDocument = pdfDocument.GetPrintDocument()
	' Set the printer name to "Microsoft Print to PDF"
	printDocument.PrinterSettings.PrinterName = "Microsoft Print to PDF"
	' Specify the file name for the printed document
	printDocument.PrinterSettings.PrintFileName = "files/printedfile2.pdf"
	' Enable printing to file
	printDocument.PrinterSettings.PrintToFile = True
	' Set custom printer resolution
	printDocument.DefaultPageSettings.PrinterResolution = New PrinterResolution With {
		.Kind = PrinterResolutionKind.Custom,
		.X = 1200,
		.Y = 1200
	}

	' Initiate the print process
	printDocument.Print()
End Using

In the above code snippet, IronPDF facilitates advanced PDF printing customization. It generates a PrintDocument from a PdfDocument, allowing customization of printer settings, printer name, output file name, and resolution. Setting the PrintFileName is important, as it allows you to bypass the print dialog for printing. The code then triggers printing using the print method, directing the print PDF document content to a specified printer, i.e., "Microsoft Print to PDF" in this case. Finally, save the output as a PDF file. This enables seamless, dialog-free PDF printing with tailored settings.

You can also specify a page range to print a PDF document without a printer dialog and Adobe Acrobat Reader, all by incorporating IronPDF into your project. For more detailed information on printing, visit the code examples page.

Wynik

After executing the project, the two output printed PDF files are generated in the specified folder without any user interaction. You can also compare the size difference with the advanced options used.

Image displaying the two printed PDF files "printedfile1.pdf" and "printedfile2.pdf"