How to Automatically Print PDFs to a Specific Printer Queue?

Automating PDF Printing to a Designated Printer

Problem: How can a PDF file, created on a user's desktop, be automatically sent to a specific local printer queue upon a user-initiated action?

Solution: Leveraging the PdfiumViewer Library

The Google Pdfium library, along with its .NET wrapper PdfiumViewer, provides a straightforward solution. Below is an example demonstrating silent PDF printing with customizable settings:

<code class="language-csharp">public bool PrintPDF(string printerName, string paperSizeName, string filePath, int numberOfCopies)
{
    try
    {
        // Configure printer settings
        var printerSettings = new PrinterSettings
        {
            PrinterName = printerName,
            Copies = (short)numberOfCopies
        };

        // Configure page settings
        var pageSettings = new PageSettings(printerSettings)
        {
            Margins = new Margins(0, 0, 0, 0) // Set margins to zero
        };

        // Find the specified paper size
        foreach (PaperSize paperSize in printerSettings.PaperSizes)
        {
            if (paperSize.PaperName == paperSizeName)
            {
                pageSettings.PaperSize = paperSize;
                break;
            }
        }

        // Initiate PDF printing
        using (var pdfDocument = PdfDocument.Load(filePath))
        using (var printDocument = pdfDocument.CreatePrintDocument())
        {
            printDocument.PrinterSettings = printerSettings;
            printDocument.DefaultPageSettings = pageSettings;
            printDocument.PrintController = new StandardPrintController(); //Ensures standard printing behavior
            printDocument.Print();
        }
        return true;
    }
    catch (Exception ex)
    {
        //Handle exceptions appropriately (log, display error message, etc.)
        return false;
    }
}</code>

Key Considerations:

• Install the PdfiumViewer NuGet package to utilize this library.
• Adjust the code to accommodate different copy counts and printer configurations as needed.
• PdfiumViewer's open-source nature (Apache 2.0 license) makes it suitable for various applications. Remember to handle potential exceptions for robust error management.

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