该项目使用C#并使用iTextSharp.
我有一个带有标题(字符串)和文件内容(字节数组)的字典.我遍历这个字典并将所有文件合并在一起.我现在需要的是在每个文件的第一页开头添加书签,但我不应该在最终文档中添加任何新页面或文本.我尝试了不同的解决方案,但似乎都添加了目录页面,每页之前的新页面或页面开头的一些文本.
这些文件都没有最初的书签.
我正在寻找一个看起来像这样的书签结构:
> File1
> File2
> SomeCategory
> File3
> File4
如果有人能指出我正确的方向,我将非常感激.
我合并文件的功能如下所示:
/// <summary>
/// Merge PDF files, and stamp certificates. This is a modified version of the example in the link below.
/// See: http://www.codeproject.com/Articles/28283/Simple-NET-PDF-Merger for more information.
/// </summary>
/// <param name="sourceFiles">Files to be merged</param>
/// <returns>Byte array with the combined files.</returns>
public static byte[] MergeFiles(Dictionary<string, byte[]> sourceFiles)
{
var document = new Document();
var output = new MemoryStream();
try
{
// Initialize pdf writer
var writer = PdfWriter.GetInstance(document, output);
writer.PageEvent = new PdfPageEvents();
// Open document to write
document.Open();
var content = writer.DirectContent;
// Iterate through all pdf documents
foreach (var sourceFile in sourceFiles)
{
// Create pdf reader
var reader = new PdfReader(sourceFile.Value);
var numberOfPages = reader.NumberOfPages;
// Iterate through all pages
for (var currentPageIndex = 1; currentPageIndex <=
numberOfPages; currentPageIndex++)
{
// Determine page size for the current page
document.SetPageSize(
reader.GetPageSizeWithRotation(currentPageIndex));
// Create page
document.NewPage();
var importedPage =
writer.GetImportedPage(reader, currentPageIndex);
// Determine page orientation
var pageOrientation = reader.GetPageRotation(currentPageIndex);
if ((pageOrientation == 90) || (pageOrientation == 270))
{
content.AddTemplate(importedPage, 0, -1f, 1f, 0, 0,
reader.GetPageSizeWithRotation(currentPageIndex).Height);
}
else
{
content.AddTemplate(importedPage, 1f, 0, 0, 1f, 0, 0);
}
// Add stamp to certificates
if (sourceFile.Key.IsValidDocumentReference())
AddStamp(content, document, sourceFile.Key, currentPageIndex, numberOfPages);
}
}
}
catch (Exception exception)
{
throw new Exception("An unexpected exception occured during the merging process", exception);
}
finally
{
document.Close();
}
return output.GetBuffer();
}
解决方法:
感谢Bruno Lowagie指出了我正确的方向,我能够解决我的问题.
这是我的解决方案:
public static byte[] MergeFilesAndAddBookmarks(Dictionary<PrintDocument, byte[]> sourceFiles)
{
using (var ms = new MemoryStream())
{
using (var document = new Document())
{
using (var copy = new PdfCopy(document, ms))
{
//Order the files by chapternumber
var files = sourceFiles.GroupBy(f => f.Key.ChapterNumber);
document.Open();
var outlines = new List<Dictionary<string, object>>();
var pageIndex = 1;
foreach (var chapterGroup in files)
{
var map = new Dictionary<string, object>();
outlines.Add(map);
map.Add("Title", chapterGroup.First().Key.ChapterName);
var kids = new List<Dictionary<string, object>>();
map.Add("Kids", kids);
foreach (var sourceFile in chapterGroup)
{
using (var reader = new PdfReader(sourceFile.Value))
{
// add the pages
var n = reader.NumberOfPages;
for (var page = 0; page < n;)
{
if (page == 0)
{
var kid = new Dictionary<string, object>();
kids.Add(kid);
kid["Title"] = sourceFile.Key.Title;
kid["Action"] = "GoTo";
kid["Page"] = String.Format("{0} Fit", pageIndex);
}
copy.AddPage(copy.GetImportedPage(reader, ++page));
}
pageIndex += n;
reader.Close();
}
}
}
copy.Outlines = outlines;
document.Close();
copy.Close();
ms.Close();
}
}
return ms.ToArray();
}
}
}
public class PrintDocument
{
public string Title { get; set; }
public string ChapterName { get; set; }
public int ChapterNumber { get; set; }
}