static void Main(string[] args){ //加载含有多级书签的PDF文件 PdfDocument doc = new PdfDocument(); doc.LoadFromFile("示例.pdf"); //获取文档的书签 PdfBookmarkCollection bookmarks = doc.Bookmarks; //声明一个可变字符串 StringBuilder stringbuilder = new StringBuilder(); //获取父书签和子书签 GetBookmarkTitle(bookmarks, stringbuilder); //声明txt文件,并将获得的多级书签写入到文件.txt String fileName = "D://文件.txt"; File.WriteAllText(fileName, stringbuilder.ToString()); Console.ReadLine();}static void GetBookmarkTitle(PdfBookmarkCollection bookmarks, StringBuilder stringbuilder) { if (bookmarks.Count > 0) { foreach (PdfBookmark parentBookmark in bookmarks) { stringbuilder.AppendLine(parentBookmark.Title); //递归文档多级书签 GetBookmarkTitle(parentBookmark, stringbuilder); } }}

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