How Can I Automate PDF Printing to a Specific Printer Without User Interaction?

Use Google Pdfium library to realize automatic printing of PDF files

Question:

PDF files generated by the desktop application need to be printed. How can I send these files directly to the printer without user intervention?

Solution:

The Google Pdfium library (.NET package named PdfiumViewer) provides a solution for seamlessly printing PDF documents. Here's a step-by-step guide:

1. Install PdfiumViewer NuGet package:

In the Visual Studio project, install the PdfiumViewer NuGet package through the NuGet package manager.

2. Create printer settings:

Construct PrinterSettings and PageSettings objects to define the target printer and paper size.

3. Load PDF document:

Use PdfDocument.Load(filename) to load the PDF file to be printed.

4. Create print document:

Use document.CreatePrintDocument() to generate a PrintDocument object to connect the PDF document with printer settings.

5. Print document:

Finally, execute printDocument.Print() to start the printing process.

Implementation example:

The following code snippet demonstrates how to silently print multiple copies of a PDF file:

<code class="language-csharp">public bool PrintPDF(string printer, string paperName, string filename, int copies)
{
    try
    {
        var printerSettings = new PrinterSettings
        {
            PrinterName = printer,
            Copies = (short)copies
        };

        var pageSettings = new PageSettings(printerSettings)
        {
            Margins = new Margins(0, 0, 0, 0)
        };

        foreach (PaperSize paperSize in printerSettings.PaperSizes)
        {
            if (paperSize.PaperName == paperName)
            {
                pageSettings.PaperSize = paperSize;
                break;
            }
        }

        using (var document = PdfDocument.Load(filename))
        {
            using (var printDocument = document.CreatePrintDocument())
            {
                printDocument.PrinterSettings = printerSettings;
                printDocument.DefaultPageSettings = pageSettings;
                printDocument.PrintController = new StandardPrintController();
                printDocument.Print();
            }
        }

        return true;
    }
    catch
    {
        return false;
    }
}</code>

The above is the detailed content of How Can I Automate PDF Printing to a Specific Printer Without User Interaction?. For more information, please follow other related articles on the PHP Chinese website!