Recently Updated
Unplanned
Last Updated:
10 Nov 2025 11:41
by Martin Ivanov
Created by:
Martin Ivanov
Comments:
0
Category:
PDFViewer
Type:
Bug Report
The edited value of an interactive form field (for example TextBox) is not committed when the form goes outside of the viewport while still in edit mode.
Unplanned
Last Updated:
30 Oct 2025 12:28
by Ronen
Created by:
Tony
Comments:
3
Category:
PDFViewer
Type:
Bug Report
OutOfMemoryException has thrown when creating a thumbnail with the ThumbnailFactory.
This behavior is observed with binaries version 2020.2.513 or later.
This behavior is observed with binaries version 2020.2.513 or later.
Completed
Last Updated:
22 Oct 2025 12:33
by ADMIN
Created by:
Murugesh
Comments:
2
Category:
PDFViewer
Type:
Bug Report
Telerik.Windows.Zip.InvalidDataException for unknown (0xAD) compression method is thrown for some object streams.
Declined
Last Updated:
02 Sep 2025 11:49
by ADMIN
ADMIN
Created by:
Deyan
Comments:
1
Category:
PDFViewer
Type:
Bug Report
The issue is reproducible only on Windows XP. On newer versions of windows, the images are rendered as expected.
WORKAROUND: You may inherit DctDecode class in order to implement custom decoder. For instance, you may try calling DecodeWithJpegDecoder method from the base class as mentioned in the note of this documentation article:
http://docs.telerik.com/devtools/wpf/controls/radpdfviewer/customization-and-extensibility/customize-pdf-rendering
A sample implementation of these custom decoder may be seen below:
public class CustomDctDecode : DctDecode
{
public override byte[] Decode(PdfObject decodedObject, byte[] inputData, DecodeParameters parms)
{
return DecodeWithJpegDecoder(inputData);
}
}
Completed
Last Updated:
15 Aug 2025 13:49
by ADMIN
Release 2025.3.806 (2025 Q3)
Created by:
Jiri
Comments:
0
Category:
PDFViewer
Type:
Bug Report
Currently, the PdfProcessing document model is providing support only for a single function in the Function entry.
According to the PDF Specification: Function: A 1-in, n-out function or an array of n 1-in, 1-out functions.
Unplanned
Last Updated:
24 Jun 2025 14:54
by Martin Ivanov
Created by:
Martin Ivanov
Comments:
0
Category:
PDFViewer
Type:
Bug Report
The size of some images in specific documents is scaled and positioned wrongly.
Unplanned
Last Updated:
11 Jun 2025 07:23
by Stefan
Created by:
Stefan
Comments:
0
Category:
PDFViewer
Type:
Feature Request
Expose API that allows you to add/remove Annotations/IPointerHandler implementations from the PointerHandlersController.
Unplanned
Last Updated:
03 Jun 2025 09:32
by Martin Ivanov
Created by:
Martin Ivanov
Comments:
0
Category:
PDFViewer
Type:
Feature Request
Currently, RadPdfViewer doesn't allow you to render notes/comments added to the highlight annotations. Add the option to render this and possibly allow editing.
Unplanned
Last Updated:
27 May 2025 06:14
by Geoff
Created by:
Geoff
Comments:
0
Category:
PDFViewer
Type:
Bug Report
The path objects are not drawn with correct background.
Completed
Last Updated:
21 May 2025 07:52
by ADMIN
Release 2025.2.521 (2025 Q2)
Created by:
Stenly
Comments:
0
Category:
PDFViewer
Type:
Bug Report
When importing a PDF file, its text can be missing.
Completed
Last Updated:
21 May 2025 07:52
by ADMIN
Release 2025.2.521 (2025 Q2)
Created by:
Stenly
Comments:
0
Category:
PDFViewer
Type:
Bug Report
The image rendering of the signed document with indexed color space is incorrect when importing it.
Completed
Last Updated:
21 May 2025 07:52
by ADMIN
Release 2025.2.521 (2025 Q2)
Created by:
Stenly
Comments:
0
Category:
PDFViewer
Type:
Bug Report
Having a file with a very thin border thickness is displayed with increased thickness when displaying a document inside RadPdfViewer.
Unplanned
Last Updated:
07 May 2025 15:15
by Valentin
Created by:
LindenauAtSOG
Comments:
11
Category:
PDFViewer
Type:
Bug Report
When displaying PDF-Files using PDFViewer, ContentElementsCanvas .RenderAsync uses reflection (DispatcherObjectUtils.ApplyDispatcher) to render Visuals on multiple threads.
However this leads to a memory leak since the dispatchers cant be GC'ed, see screenshot below.
The Screenshot is from the actual application we expirienced this issue with, the attached reproduction example is a boiled down version of what your code does.
If you wanna reproduce this on your own, create an application that uses PdfViewer that switches between many pdf files. The ammount of Dispatchers will grow steadily, probably to a total of the number of threads used by Task.Factory.
However this leads to a memory leak since the dispatchers cant be GC'ed, see screenshot below.
The Screenshot is from the actual application we expirienced this issue with, the attached reproduction example is a boiled down version of what your code does.
If you wanna reproduce this on your own, create an application that uses PdfViewer that switches between many pdf files. The ammount of Dispatchers will grow steadily, probably to a total of the number of threads used by Task.Factory.
Unplanned
Last Updated:
10 Mar 2025 10:39
by Martin Ivanov
Created by:
Martin Ivanov
Comments:
0
Category:
PDFViewer
Type:
Feature Request
Add support for handwritten (graphometric information) signatures in the PdfViewer.
Completed
Last Updated:
12 Feb 2025 15:20
by ADMIN
Release 2025.1.205 (2025 Q1)
Created by:
Manuel
Comments:
0
Category:
PDFViewer
Type:
Bug Report
NullReferenceException when Type1 font with random bytes count ("lenIV") is set to 0.
Completed
Last Updated:
12 Feb 2025 15:19
by ADMIN
Release 2025.1.205 (2025 Q1)
ADMIN
Created by:
Deyan
Comments:
0
Category:
PDFViewer
Type:
Feature Request
This action is usually linked to a Button field and with it, the user of the application may revert all field values to their defaults.
Completed
Last Updated:
11 Feb 2025 07:40
by ADMIN
Release 2025.1.211 (2025 Q1)
Created by:
Marc
Comments:
0
Category:
PDFViewer
Type:
Bug Report
ArgumentOutOfRangeException when PDFViewer is loaded async and one scrolls for some time.
Completed
Last Updated:
11 Feb 2025 07:40
by ADMIN
Release 2025.1.211 (2025 Q1)
ADMIN
Created by:
Deyan
Comments:
0
Category:
PDFViewer
Type:
Bug Report
Some colors are changed due to incorrect import of some graphic state colors.
Completed
Last Updated:
13 Jan 2025 06:57
by ADMIN
Release 2024.4.1219 (Preview)
Created by:
Thomas
Comments:
6
Category:
PDFViewer
Type:
Bug Report
PdfViewer: Invalid rendering with German culture (Regression). Some text is missing and the rendering is broken.
Duplicated
Last Updated:
08 Jan 2025 13:50
by ADMIN
Created by:
Mike
Comments:
3
Category:
PDFViewer
Type:
Bug Report
Hi Telerik-Team,
the 2024.4.X release of UI for WPF seems to no longer render pdf files correctly. It looks like as if the PdfViewer just renders the document as a single huge page.
An application that uses those references:
<PackageReference Include="Telerik.Windows.Controls.for.Wpf.Xaml" Version="2024.3.924" />
<PackageReference Include="Telerik.Windows.Controls.FixedDocumentViewers.for.Wpf.Xaml" Version="2024.3.924" />
<PackageReference Include="Telerik.Windows.Documents.Core" Version="2024.3.806" />
<PackageReference Include="Telerik.Windows.Documents.Fixed" Version="2024.3.806" />
<PackageReference Include="Telerik.Windows.Zip" Version="2024.3.806" />works as expected. Once you change those to:
<PackageReference Include="Telerik.Windows.Controls.for.Wpf.Xaml" Version="2024.4.1111" />
<PackageReference Include="Telerik.Windows.Controls.FixedDocumentViewers.for.Wpf.Xaml" Version="2024.4.1111" />
<PackageReference Include="Telerik.Windows.Documents.Core" Version="2024.4.106" />
<PackageReference Include="Telerik.Windows.Documents.Fixed" Version="2024.4.106" />
<PackageReference Include="Telerik.Windows.Zip" Version="2024.4.106" />the renderer stops working.
I have attached a VS solution with a pdf file that reproduces this