Unplanned
Last Updated: 24 Aug 2026 13:43 by ADMIN
The Telerik Reporting installer adds a copy of the legacy ASP.NET WebForms Report Viewer assembly(Telerik.ReportViewer.WebForms.dll) to the Global Assembly Cache (GAC).
Unplanned
Last Updated: 27 Aug 2026 12:04 by ADMIN
Created by: Pascal
Comments: 1
Category: Reporting
Type: Feature Request
1
The fonts defined in the fontLibrary element are discovered once, lazily on first use, and are cached for the process lifetime. Fonts added to the configured directories afterward are not picked up automatically —  a restart of the application is needed.
As we install fonts regularly and don't want to restart/redeploy everytime we install a new font we propose a new api to clear the cache.
A new method Telerik.Reporting.Fonts.RefreshCache would solve this problem and improve the experience of using the Telerik Reporting library.
Unplanned
Last Updated: 18 Aug 2026 12:16 by Abhilash Reddy

I have created a report group, and in that group's header, I have added a textbox with a sorting action.

The action can be triggered, but the data does not get sorted, regardless of whether the sorting target is the report itself or the group from which the group section is created. 

Unplanned
Last Updated: 18 Aug 2026 12:45 by ADMIN
Currently, the Download Raw Data action is available only for the WinForms Report Viewer. I would like to see it implemented for the web-based Report Viewers as well, so that our end-users can easily download the data used in the report.
Unplanned
Last Updated: 17 Aug 2026 08:43 by ADMIN
Scheduled for 2026 Q4 (Nov)
Created by: Russ
Comments: 0
Category: Reporting
Type: Feature Request
1
Currently, when using a BackgroundImage on report items such as Panels, there is no way to control how the image is positioned/scaled within the container. The current workaround is to use a PictureBox for this and place it behind the content, but it is not ideal, especially considering the overlapping content.
Unplanned
Last Updated: 05 Aug 2026 15:34 by office
When content associated with a TOC entry is hidden, subsequent TOC page numbers may be offset by one page. In the attached sample, the issue occurs when a Group Footer containing the TOC entry is hidden and the TOC is close to spilling onto a second page.
Unplanned
Last Updated: 05 Aug 2026 08:22 by Markus
Created by: Markus
Comments: 0
Category: Reporting
Type: Bug Report
1

When the reports are displayed within the WPF Report Viewer, they are rendered in the XAML format, and it does not natively support SVGs.

Currently, the SVGs are always rasterized before being written to the XAML, which results in the images being blurred when zooming in the report viewer.

Unplanned
Last Updated: 05 Aug 2026 06:39 by Pramod

When I enable accessibility in my reports, the final PDF document becomes 20+ times bigger than without accessibility. The reports contain large amounts of data and result in 2000+ pages.

I need the images in my reports (usually only one logo) to have alternative text, so the screen readers can describe them. To achieve this, currently I have to enable accessibility for the entire report, hence the huge final documents.

It would be very useful for my scenario to add alternative text to the PictureBox without declaring the entire report as accessible.

Unplanned
Last Updated: 27 Jul 2026 06:33 by Gianluca Mariani

Currently, the Download Raw Data action is available in the Windows Form Report Viewer. It is hard-coded there, and the download button appears when you hover over the data item.

The developer can cancel the action through the interactive action event handlers. However, the button persists even when the action is cancelled and doesn't do anything, which is misleading and confusing for the report readers.

Please let the developers disable the action/button, for example, through configuration in the viewer.

Unplanned
Last Updated: 23 Jul 2026 08:33 by Pragati

We get an incorrect “Email format is not valid” validation when sending a report to multiple recipients. We are using the wrapper/HTML5 Angular Report Viewer

Steps to Reproduce

  1. Open any report in the Telerik Report Viewer.
  2. Click Send Email.
  3. In the To field, enter multiple valid email addresses, for example:

    user1@example.com,user2@example.com

    or

    user1@example.com;user2@example.com
  4. Click Send.

Actual Result

  • The validation message "Email format is not valid." is displayed beneath the To field.
  • Despite the validation error, the email is sent successfully to all recipients.

Expected Result

  • Multiple valid email addresses should be accepted without displaying a validation error.
  • Since the email is successfully delivered, no validation message should be shown.
Unplanned
Last Updated: 08 Jul 2026 08:53 by Marco
Add support for print preview in the print dialog (Windows 11) of the desktop viewers. I am using the WPF viewer specifically. This preview appears for other print jobs—only when printing the Telerik report it does not.
Unplanned
Last Updated: 07 Jul 2026 14:12 by Prashanth
Created by: Prashanth
Comments: 0
Category: Reporting
Type: Feature Request
1

Currently, graph axes do not provide a way to render separator lines between category groups. While this is generally not an issue for simple scenarios, it can make charts with nested categories difficult to read.

For example, when a graph displays multiple subcategories under a parent category (such as revenue ranges grouped by quarter), there is no built-in visual indicator showing where one parent category ends and the next begins.

It would be useful to provide support for category separators on graph axes, allowing report authors to visually separate category groups and improve readability when working with hierarchical data.

Unplanned
Last Updated: 07 Jul 2026 14:07 by Prashanth
Created by: Prashanth
Comments: 0
Category: Reporting
Type: Feature Request
1
Currently, the LabelAngle property of a graph axis only affects the outermost category labels. For graphs with subcategories, there is no way to rotate the inner category labels independently. I would like to have control over the rotation of all category label levels, not just the outermost one.
Unplanned
Last Updated: 09 Jun 2026 12:38 by ranga

I have localized a report with a Graph in the 'ar-SA' culture.

When exporting to PDF from the viewer, the report is generated as expected. In the Report Viewer's Preview, though, the Graph Legend and Labels are not correct:

I am using Native Blazor Report Viewer, but the problem also reproduces in the HTML5-based web viewers, with all the themes I have tested.

Unplanned
Last Updated: 02 Jun 2026 17:28 by Carl

We have spotted that PInvoke is now marked as deprecated (this applies even to the latest 0.7.124 version). In the description of the PInvoke.User32 NuGet package, it is mentioned that Microsoft.Windows.CsWin32 should be used instead:

Please consider replacing the deprecated package.

Unplanned
Last Updated: 19 May 2026 09:57 by Carl
When I configure a CsvDataSource through the wizard, leave "The CSV has headers" unset (generating dummy column names), then navigate back to select a different CSV file with actual headers and tick "The CSV has headers", the dummy columns from the first file persist instead of being replaced with the real headers from the new file.
Unplanned
Last Updated: 14 May 2026 05:18 by ranga

In the Standalone Report Designer File menu, please add the shortcuts next to menu items, like Ctrl + S for Save and  Ctrl+Shift+S for Save All.

I changed several reports and then wanted to know how to save all reports at once.

Unplanned
Last Updated: 01 Jun 2026 12:10 by ADMIN
Created by: Winnie
Comments: 1
Category: Reporting
Type: Bug Report
1
I am trying to use the line chart wizard; however, after selecting the data source, it seems to silently fail, as it does not display any fields, the "Next >" button is disabled, and no errors are displayed.
Unplanned
Last Updated: 03 Apr 2026 08:15 by Khaled Salman

I have a Telerik report designed in the Standalone Report Designer. In the HTML5 Report Viewer, the report seems to be correct, but when I export the report in PDF, the word order changes.

The problem occurs in the HTMLTextBox when rendering in PDF and previewing in the Standalone Designer with both Skia and GDI+.

In the TextBox, the same text is displayed as expected.

When previewing in the HTML Report Viewer, the Arabic text seems fine.

Unplanned
Last Updated: 11 Mar 2026 15:48 by Winnie

WPF report viewer crashes when launching it the second time. The issue appears to occur only when having a trial license activated.

System.Windows.Data Error: 23 : Cannot convert '<null>' from type '<null>' to type 'System.Uri' for 'en-US' culture with default conversions; consider using Converter property of Binding. NotSupportedException:'System.NotSupportedException: UriTypeConverter cannot convert from (null).
   at System.ComponentModel.TypeConverter.GetConvertFromException(Object value)
   at System.ComponentModel.TypeConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value)
   at System.UriTypeConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value)
   at MS.Internal.Data.DefaultValueConverter.ConvertHelper(Object o, Type destinationType, DependencyObject targetElement, CultureInfo culture, Boolean isForward)'
Exception thrown: 'System.NullReferenceException' in Telerik.ReportViewer.Wpf.dll
Object reference not set to an instance of an object.

1 2 3 4 5 6