打印 PDF 文件，每张多页

有一个 PDF 文件，您需要编写一个代码来打印这个文件，并在一张纸上拆分几页（例如，4.8 x 1），我使用库 Spire.PDF、Spire.Document（来源：https:// www.e-iceblue.com/Introduce/pdf-for-net-introduce.html#.W5d0JvYnZPY）和 ZetPdf（来源：https ://zetpdf.com/ ）。如果您通过 Spire.Pdf 组件工作，那么我使用这种方法（代码取自文档）

internal static void splitPdfFileByBookmarks()
    {

        using (PdfDocument pdf = new PdfDocument(PdfConformanceLevel.Pdf_A1A))
        {
            pdf.LoadFromFile(@"d:\PdfFiles\10_11_1808_p.pdf");
            pdf.FileInfo.Version = PdfVersion.Version1_7;
            PdfPageBase pageBase = pdf.Pages.Add(PdfPageSize.A4, new PdfMargins());

这里我们一页放4页。我保存文档，也保存不拆分

            pdf.PrintSettings.SelectMultiPageLayout(1,4);

            pdf.SaveToFile(@"d:\PdfFiles\file.pdf",FileFormat.PDF);
        }
    }

如果您使用 ZetPdf 组件，则只有 2 页的拆分。1，但没有更多。

 string filename = "Portable Document Format.pdf";
            File.Copy(Path.Combine("../../../../../PDFs/", filename),
              Path.Combine(Directory.GetCurrentDirectory(), filename), true);

            // Create the output document
            PdfDocument outputDocument = new PdfDocument();

            // Show single pages
            // (Note: one page contains two pages from the source document)
            outputDocument.PageLayout = PdfPageLayout.SinglePage;

            XFont font = new XFont("Verdana", 8, XFontStyle.Bold);
            XStringFormat format = new XStringFormat();
            format.Alignment = XStringAlignment.Center;
            format.LineAlignment = XLineAlignment.Far;
            XGraphics gfx;
            XRect box;

            // Open the external document as XPdfForm object
            XPdfForm form = XPdfForm.FromFile(filename);

            for (int idx = 0; idx < form.PageCount; idx += 2)
            {
            // Add a new page to the output document

在这部分代码中添加了一个页面，我尝试创建 page_2 并添加页面错误“无法将页面添加到此文档，因为该文档已拥有此页面。”

            PdfPage page = outputDocument.AddPage();
            page.Orientation = PageOrientation.Landscape;
            double width = page.Width;
            double height = page.Height;

            int rotate = page.Elements.GetInteger("/Rotate");

                gfx = XGraphics.FromPdfPage(page);

                // Set page number (which is one-based)
                form.PageNumber = idx + 1;

                box = new XRect(0, 0, width/4, height/2);
                // Draw the page identified by the page number like an image
                gfx.DrawImage(form, box);

                // Write document file name and page number on each page
                box.Inflate(0, -10);
                gfx.DrawString(String.Format("- {1} -", filename, idx + 1),
                  font, XBrushes.Red, box, format);

                if (idx + 1 < form.PageCount)
                {
                // Set page number (which is one-based)
                form.PageNumber = idx + 2;

                    box = new XRect(width / 4, 0, width/4 , height/2);
                    // Draw the page identified by the page number like an image
                    gfx.DrawImage(form, box);

                    // Write document file name and page number on each page
                    box.Inflate(0, -10);
                    gfx.DrawString(String.Format("- {1} -", filename, idx + 2),
                      font, XBrushes.Red, box, format);
                }
            }

            // Save the document...
            filename = "TwoPagesOnOne_tempfile.pdf";
            outputDocument.Save(filename);
            // ...and start a viewer.
            Process.Start(filename);

有没有人遇到过这样的问题？现在我在挖掘其他组件，也许有人会告诉你一些解决方案。