Search for uppercase accents like é vs É

[Oussama Melki]

Hello,

is there a way to be able to search for words with accents with specific upper case letters?

For example, I would like to search for "École" or "école", my search needs to be case sensitive.

• Screenshot 1 shows that I am searching for "dÉcrits" and it doesn't find it
• Screenshot 2 shows that I am searching for "décrits" and it finds it.
• in both examples the match case is unchecked

I'm using the WPF PdfViewer control in a winform application, and the search I am talking about is the on embedded within the tool.

Thanks for any help

Attachment: SyncFusion_Screenshot_2_c6e7c5ab.png

[Yathavakrishnan Mohan]

Hi melki,

 

We were able to reproduce the reported issue using the provided details. On our end, we created a document containing two words: ‘dÉcrits’ and ‘décrits’, loaded it in the PDF viewer, and searched for the word ‘décrits’. The search returned only one occurrence, even when the ‘Match Case’ option was disabled. We are currently analyzing the issue and will provide further details by November 06, 2025.

 

Regards,
Yathavakrishnan Mohan

[Oussama Melki]

thanks a lot :) 

[Yamini Sri Muthunagarajan]

Hi melki,

We need to analyze this issue in detail on our end, so we require additional time to investigate further and will provide you with an update by November 10, 2025.

Regards,
Yaminisri M

[Yamini Sri Muthunagarajan]

Hi Melki, 

We are currently using Pdfium to retrieve search results from PDF document pages. However, the results provided by Pdfium are not accurate. We are actively investigating this issue in detail on our end and require additional time to analyze it thoroughly. We will provide you with an update by November 12, 2025

Regards,
Yaminisri M

[Yamini Sri Muthunagarajan]

Hi Melki, 

We use PDFium for rendering and text extraction in our WPF PdfViewer control. After further validation, we found that the search results from PDFium for specific accented characters are incorrect. Currently, we are working on creating a simple sample to report this issue to the respective team. We have logged this as a bug and will continue investigating further. We will update you shortly.

Regards,

YaminiSri M

[Yamini Sri Muthunagarajan]

Hi Melki, 

We have reported this issue on the Pdfium public forum and have sent them a follow-up reminder. We will keep you updated as soon as we receive any response or updates from their team.

The APIs "FPDFText_FindStart" are not functioning properly for find text [462227051] - Chromium

Regards,

YaminiSri M

[Oussama Melki]

I wanted to get back to this thread and say that with one of the latest updates the issue is no longer happening. 

[Yamini Sri Muthunagarajan]

Hi Melki, 

Based on the Pdfium forum ticket, they suggested upgrading to the latest version. We are currently using Chromium 6945. Once we update to the latest version, we will need to check the stability of our control after the upgrade.

At present, we do not have any immediate plans to implement this. During the planning stage for each release cycle, we review all open features and prioritize them based on feature rank, customer request count, and the volume of the wish list.

The status of implementation can be tracked through the feedback portal link below:

https://www.syncfusion.com/feedback/73029/upgrade-pdfium-to-the-latest-version 

Regards,

YaminiSri M