我正在使用PdfSmartCopy和GetImportedPage合并两个文档。第一个文档包含对第二个文档中锚名称的锚引用。
合并文档时，锚点引用不起作用。这是针对iTextSharp 5.4.5.0
编译的演示代码在示例代码中，“Go To Anchor 2”在合并文件（file3.pdf）中不起作用。
有没有人解决过这个问题或者能看出原因？
using (var fs1 = new FileStream("c:/test/file1.pdf", FileMode.Create, FileAccess.Write))
{
using (var doc = new iTextSharp.text.Document())
{
var writer = PdfWriter.GetInstance(doc, fs1);
doc.Open();
doc.Add(new Paragraph("Page 1"));
doc.Add(new Anchor("Go To Anchor 1") { Reference = "#AnchorReference1" });
doc.Add(new Paragraph(""));
doc.Add(new Anchor("Go To Anchor 2") { Reference = "#AnchorReference2" });
doc.NewPage();
doc.Add(new Paragraph("Page 2"));
doc.Add(new Anchor("Anchor 1") { Name = "AnchorReference1" });
doc.Close();
}
}
using (var fs2 = new FileStream("c:/test/file2.pdf", FileMode.Create, FileAccess.Write))
{
using (var doc = new iTextSharp.text.Document())
{
var writer = PdfWriter.GetInstance(doc, fs2);
doc.Open();
doc.Add(new Paragraph("Page 3"));
doc.Add(new Anchor("Anchor 2") { Name = "AnchorReference2" });
doc.NewPage();
doc.Close();
}
}
using (var ms3 = new FileStream("c:/test/file3.pdf", FileMode.Create, FileAccess.Write))
{
using (var doc = new iTextSharp.text.Document())
{
var copy = new PdfSmartCopy(doc, ms3);
doc.Open();
var pdfReader1 = new PdfReader("c:/test/file1.pdf");
var pdfReader2 = new PdfReader("c:/test/file2.pdf");
copy.AddPage(copy.GetImportedPage(pdfReader1, 1));
copy.AddPage(copy.GetImportedPage(pdfReader1, 2));
copy.AddPage(copy.GetImportedPage(pdfReader2, 1));
doc.Close();
}
}
以下是同一问题的更新示例，但使用了第二版“iText in action”第7章中ConcatenateNamedDestinations示例中的代码。
using (var fs1 = new FileStream("c:/test/file1.pdf", FileMode.Create, FileAccess.Write))
{
using (var doc = new iTextSharp.text.Document())
{
var writer = PdfWriter.GetInstance(doc, fs1);
doc.Open();
doc.Add(new Paragraph("Page 1"));
doc.Add(new Anchor("Go To Anchor 1") { Reference = "#AnchorReference1" });
doc.Add(new Paragraph(""));
doc.Add(new Anchor("Go To Anchor 2") { Reference = "#AnchorReference2" });
doc.NewPage();
doc.Add(new Paragraph("Page 2"));
doc.Add(new Anchor("Anchor 1") { Name = "AnchorReference1" });
doc.Close();
}
}
using (var fs2 = new FileStream("c:/test/file2.pdf", FileMode.Create, FileAccess.Write))
{
using (var doc = new iTextSharp.text.Document())
{
var writer = PdfWriter.GetInstance(doc, fs2);
doc.Open();
doc.Add(new Paragraph("Page 3"));
doc.Add(new Anchor("Anchor 2") { Name = "AnchorReference2" });
doc.NewPage();
doc.Close();
}
}
PdfReader[] readers = { new PdfReader("c:/test/file1.pdf"), new PdfReader("c:/test/file2.pdf") };
using (var ms = new FileStream("c:/test/file3.pdf", FileMode.Create, FileAccess.Write))
{
using (var document = new Document())
{
using (var copy = new PdfCopy(document, ms))
{
document.Open();
int n;
for (int i = 0; i < readers.Length; i++)
{
readers[i].ConsolidateNamedDestinations();
n = readers[i].NumberOfPages;
for (int page = 0; page < n; )
{
copy.AddPage(copy.GetImportedPage(readers[i], ++page));
}
}
// Add named destination
copy.AddNamedDestinations(
// from the second document
SimpleNamedDestination.GetNamedDestination(readers[1], false),
// using the page count of the first document as offset
readers[0].NumberOfPages
);
}
}
// Create a reader
var reader = new PdfReader("c:/test/file3.pdf");
// Convert the remote destinations into local destinations
reader.MakeRemoteNamedDestinationsLocal();
using (var ms2 = new FileStream("c:/test/file4.pdf", FileMode.Create, FileAccess.Write))
{
// Create a new PDF containing the local destinations
using (var stamper = new PdfStamper(reader, ms2))
{
}
}
}
解决：
using (var fs1 = new FileStream("c:/test/file1.pdf", FileMode.Create, FileAccess.Write))
{
using (var doc = new iTextSharp.text.Document())
{
var writer = PdfWriter.GetInstance(doc, fs1);
doc.Open();
doc.Add(new Paragraph("Page 1"));
var anchor1Chunk = new Chunk("Click for Anchor 1");
var anchor2Chunk = new Chunk("Click for Anchor 2");
anchor1Chunk.SetAction(PdfAction.GotoLocalPage("AnchorReference1", false));
anchor2Chunk.SetAction(PdfAction.GotoLocalPage("AnchorReference2", false));
doc.Add(new Paragraph(anchor1Chunk));
doc.Add(new Paragraph(anchor2Chunk));
doc.NewPage();
doc.Add(new Paragraph("Page 2"));
doc.Add(new Anchor("Anchor 1") { Name = "AnchorReference1" });
doc.Close();
}
}
using (var fs2 = new FileStream("c:/test/file2.pdf", FileMode.Create, FileAccess.Write))
{
using (var doc = new iTextSharp.text.Document())
{
var writer = PdfWriter.GetInstance(doc, fs2);
doc.Open();
doc.Add(new Paragraph("Page 3"));
doc.Add(new Anchor("Anchor 2") { Name = "AnchorReference2" });
doc.NewPage();
doc.Close();
}
}
PdfReader[] readers = { new PdfReader("c:/test/file1.pdf"), new PdfReader("c:/test/file2.pdf") };
using (var ms = new FileStream("c:/test/file3.pdf", FileMode.Create, FileAccess.Write))
{
using (var document = new Document())
{
using (var copy = new PdfCopy(document, ms))
{
document.Open();
int n;
for (int i = 0; i < readers.Length; i++)
{
readers[i].ConsolidateNamedDestinations();
n = readers[i].NumberOfPages;
for (int page = 0; page < n; )
{
copy.AddPage(copy.GetImportedPage(readers[i], ++page));
}
}
// Add named destination
copy.AddNamedDestinations(
// from the second document
SimpleNamedDestination.GetNamedDestination(readers[1], false),
// using the page count of the first document as offset
readers[0].NumberOfPages
);
}
}
}
答案 0 :(得分：1)
如果使用命名目的地从文档A到文档B有链接，并且如果将文档A与文档B合并得到文档C，则显然文档A中的链接仍然引用文档B ，而不是文件C.
如果您希望它们引用文档C，您需要合并命名目标并使远程链接本地化，如本书第7章中所述。请参阅ConcatenateNamedDestinations示例：Java version / C# version。