How Can I Automate the Printing of Multiple PDF Files Using PdfiumViewer?

Efficiently and automatically print multiple PDF files

This article introduces how to use the PdfiumViewer library to automatically print multiple locally generated student PDF files to avoid the tedious operation of manual printing.

Although the command line can also be implemented, it is more efficient and flexible to use the open source Google Pdfium library and its .NET package PdfiumViewer. PdfiumViewer provides a user-friendly API that supports printing PDF files silently and configuring printer settings such as printer name, paper size, margins, and number of copies.

The following code snippet demonstrates how to use PdfiumViewer to print a PDF file and set specific parameters:

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

        // 创建纸张大小的页面设置
        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;
            }
        }

        // 打印PDF文档
        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>

By integrating PdfiumViewer, users can automate the printing process and efficiently generate PDF files for multiple students without manual intervention. This scheme provides a reliable and efficient mechanism for processing large amounts of printable documents.

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