How to add page numbers to a merged PDF file

[Barry]

I'm having trouble finding documentation/example code for adding page numbers to merged PDF file.  Merging of PDF files/pages I can do, adding page numbers to this new document, I cannot do.  Can anyone point me in the right direction?

 

Thanks!

[Martin]

Hello Barry,

We have a good SDK example in our GitHub repository: DrawHeaderFooter. The example demonstrates how to draw headers and footers to an existing document using PdfProcessing`s FixedContentEditor class. In the DrawHeaderAndFooterToPage() method you can see how the page numbering is implemented in the footer.

I hope you find this information helpful.

Regards,
Martin
Progress Telerik

[T]

Hi Martin,

unfortunately, the proposed solution to Barry's request is NOT working anymore, at least since 2024.4.1111 (i.e. 2024 Q4) of UI for WPF, as the editing (or inserting) any text destroys (smoetimes) the content of existing pdf pages instead of simply adding and/or overlaying the edits.

Any idea how to remedy this unacceptable effect?

Thank you!

[Yoan]

Hello,

It is possible that you are encountering an issue on our part which we are already aware of, that was introduced with the Q4 2024 release - PdfProcessing: Missing Text with specific cultures (e.g. German).

That said, I am unable to confirm this without having any resources at my disposal which I can examine first. One thing I can suggest you try is the workaround in the above-linked task. Because the issue is influenced by the currently set culture, changing the culture explicitly to "English (en-US)" should resolve the fix you are experiencing:

Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo("en-US");

If that does not resolve the issue, then you are most likely facing something else and I would require some additional resources in order to achieve the same results on my end, examine them, and try to identify the cause. It would be much appreciated if you could share with us the document used on your end and the code/project that reproduces the unexpected results.

If it comes to sharing resources, please keep in mind that this is a Q&A Forum thread and anything shared here will be publicly accessible.

I hope this helps. Let me know how it goes.

Regards,

Yoan 

[T]

Hi Yoan,

indeed, the change of the current culture info in the thread calling all the Telerik-related stuff was the solution to my problem. Now, all pdf pages in the final document are correctly numbered while its content is exactly as the original document (that with no page numbers).

Great advice, thanks!!

 

Final remark: For introducing a bug into the update of the Telerik package, that's a really nasty one. Congratulation to anyone who ever has caused it. Without this astonishing hint I would have searched for a solution forever (and probably not only me...)

[Yoan]

Hello,

Thank you for the positive feedback. I am glad to hear the suggested workaround has been sufficient in resolving the issue you are experiencing. I would also like to mention that the PdfProcessing: Missing Text with specific cultures (e.g. German) task is currently under development and if everything goes as planned we intend to introduce the fix in our upcoming Q1 2025 official release scheduled for mid-February.

Thank you for your patience and understanding,

Yoan