- Add a link to PDF with an external destination
- Add a link with an internal destination to PDF
- Add a note to PDF
- Add barcodes to PDF
- Add bookmarks to PDF
- Add footer to PDF
- Add simple html text to PDF
- Add hyperlink to PDF
- Add multiline text to a PDF document
- Add a rubber stamp annotation with a custom icon
- Add single-line text to PDF
- Add Stamp to PDF
- Add text field to PDF
- Add a Diagonal Watermark to PDF in C# - TallComponents - PDF Library
- Append two or more existing PDF files
- Change the color inside a PDF
- Change the formatting of a numeric field
- Change page orientation PDF
- Clip PDF page content in C#
- Convert PDF to plain text
- Convert SVG to PDF
- Create a text annotation in PDF with rich text
- Create formfields in PDF documents
- Create layers in PDF and draw on each layer
- Create a new digitally signed PDF document
- Create rectangles with rounded corners
- Create text with decorations
- How to create a tiling for shapes in PDF
- Crop content on a PDF page
- Determine the content bounding box
- Determine if a PDF only contains images
- Digitally sign a PDF form in C# or VB.NET
- Disable submit button after submitting
- How to downscale all images in a PDF
- Download and convert image to PDF
- How to downscale all images in a PDF
- Vector graphics in PDF
- How to embed files in a PDF document
- Embed TrueType font in PDF
- EMF to PDF as raster image - Code Sample C#
- EMF to PDF as vector image
- Export FDF from PDF form
- Extract embedded files from PDF
- Extract glyph boxes from PDF
- Extract glyphs and sort by reading order
- Extract graphics from PDF
- Extract images from PDF
- Fill in a PDF form using MVC
- Fill in a template PDF document
- Fill PDF form
- Fit image to PDF page
- Flatten Markup Annotation
- Flatten PDF form
- How to generate and export certificates
- How do I extract page destinations from bookmarks?
- Highlight fields in PDF
- How do I create graphics with Icc based colors
- How to add autosized text to PDF
- How to sign and verify updates to a PDF document
- Import FDF into PDF
- Merge PDF files in C# .NET
- How to mirror PDF pages and other shapes
- Layout text with MultilineTextShape
- Read and write meta data from PDF
- How to reduce PDF file size
- Remove graphics from PDF
- Remove PDF security settings
- Replace field with image
- Resize PDF pages
- Rotate a PDF page
- How to scale content of PDF
- Search text in PDF
- PDF Viewer Preferences
- Create a custom signature handler to sign and verify PDF documents
- Split PDF pages in C# and VB.NET
- TIFF to PDF C#
- Translate PDF page content
- Use multiple licenses
- Use TrueType font collections
- Verify a custom digital PDF signature
How do I extract page destinations from bookmarks?
This article explains how one can determine which page a particular bookmark refers to.
If one considers the PDFKit.NET Bookmark class, there appears to be no obvious place where it holds page destinations. The reason for this is simply that a PDF Bookmark is not just a true bookmark. Instead, it is an entity that can have various actions associated with it when clicked on. This can be an action that jumps to a particular page, but also an action that executes some javascript code for example. A Bookmark can have a sequence of such actions associated with it, and these will all be executed in order when someone clicks on it.
This means that one will need to inspect the actions in order to determine whether a Bookmark actually jumps to a page, and if so, which one.
Another complicating factor is that there can be multiple ways to perform such a jump. The code below takes into account internal destinations and named destinations. These are the most common cases. It is also possible to jump to a particular page via a javascript action. This is highly unusual though, – and rather complex to detect – so we ignore that possibility below.
private void listBookmarks(BookmarkCollection collection)
{
foreach (Bookmark bookmark in collection)
{
System.Diagnostics.Trace.WriteLine("bookmark: " + bookmark.Title);
foreach (Action action in bookmark.Actions)
{
GoToAction gotoAction = action as GoToAction;
if (gotoAction != null)
{
// Arbitrary actions can be attached to a bookmark, but for references inside
// a document this is normally a GoToAction with either an InternalDestination
// or a NamedDestination. The positions of an internal destination may only
// be partially defined. In that case, the Top, Left, Bottom, and
// Right values may contain NaN values (Not-A-Number).
//
// Please note that it is also possible to attach javascript to a bookmark and
// that this may execute code that goes to a particular page. This is quite
// unusual though.
InternalDestination internalDestination = gotoAction.Destination as InternalDestination;
if (internalDestination == null)
{
NamedDestination namedDestination = gotoAction.Destination as NamedDestination;
if (namedDestination != null)
{
internalDestination = document.NamedDestinations[namedDestination.Name];
}
}
if (internalDestination != null)
{
Console.WriteLine(
string.Format("internal -> page {0}, position ({1},{2})",
internalDestination.Page.Index, internalDestination.Left, internalDestination.Top));
}
}
}
// list sub-bookmarks.
listBookmarks(bookmark.Bookmarks);
}
}
Please also note that an internal destination may have undefined values (NaN) for its destination rectangle. Some destinations will have no valid rectangle at all, and will just refer to some page index.