我需要使用iTextSharp将缩放级别设置为75%到pdf文件。我正在使用以下代码来设置缩放级别。
PdfReader reader = new PdfReader("input.pdf".ToString());
iTextSharp.text.Document doc = new iTextSharp.text.Document(reader.GetPageSize(1));
doc.OpenDocument();
PdfWriter writer = PdfWriter.GetInstance(doc, new FileStream("Zoom.pdf", FileMode.Create));
PdfDestination pdfDest = new PdfDestination(PdfDestination.XYZ, 0, doc.PageSize.Height, 0.75f);
doc.Open();
PdfAction action = PdfAction.GotoLocalPage(1, pdfDest, writer);
writer.SetOpenAction(action);
doc.Close();
但是我收到错误"第1页是请求,但文档只有0页"在doc.Close();
答案 0 :(得分:1)
你需要使用PdfStamper
(由mkl表示)而不是PdfWriter
(由Chris Haas明确表示)。请查看AddOpenAction
示例:
public void manipulatePdf(String src, String dest) throws IOException, DocumentException {
PdfReader reader = new PdfReader(src);
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
PdfDestination pdfDest = new PdfDestination(PdfDestination.XYZ, 0, reader.getPageSize(1).getHeight(), 0.75f);
PdfAction action = PdfAction.gotoLocalPage(1, pdfDest, stamper.getWriter());
stamper.getWriter().setOpenAction(action);
stamper.close();
reader.close();
}