Unplanned
Last Updated: 12 Nov 2025 16:57 by Pascal
Created by: Pascal
Comments: 0
Category: Reporting
Type: Bug Report
0

We have some issues with cut off texts on our PDF reports. It only happens rarely and only with some fonts.

 

TSE note: This is an investigation item for tracking purposes. The actual font is included in the private GitHub issue linked to this item.

Unplanned
Last Updated: 12 Nov 2025 16:44 by ADMIN
Scheduled for 2026 Q1
Hi Team
We are using the Telerik Reporting component and are very happy
We really wanted to use the Table of Contents component in our reports
The Table of Contents works great but unfortunately does not support right-to-left in Hebrew
I guess for you this is a small fix and for us it will be a big relief
We ask for your help and improve the component for us so that the wonderful Table of Contents supports right-to-left
Thank you
Tamar
Completed
Last Updated: 12 Nov 2025 14:33 by ADMIN
Release 2025 Q4

When I open a tab that includes the Angular report viewer and close it immediately after, before the viewer can be properly initialized, the following error will be thrown:

core.js:7744  ERROR Error: Uncaught (in promise): TypeError: perspectiveManager.dispose is not a function
TypeError: perspectiveManager.dispose is not a function
    at Object.dispose (telerikReportViewer.js:8447:30)
    at TelerikReportViewerComponent.ngOnDestroy (telerik-report-viewer.component.js:61:27)
    at executeOnDestroys (core.js:6118:1)
    at cleanUpView (core.js:6021:1)
    at destroyViewTree (core.js:5847:1)
    at destroyLView (core.js:5999:1)
    at RootViewRef.destroy (core.js:22750:1)
    at ComponentRef$1.destroy (core.js:25284:1)
    at RouterOutlet.deactivate (router.js:5577:1)
    at ActivateRoutes.deactivateRouteAndOutlet (router.js:2101:1)
    at resolvePromise (zone.js:1211:1)
    at resolvePromise (zone.js:1165:1)
    at zone.js:1278:1
    at _ZoneDelegate.invokeTask (zone.js:406:1)
    at Object.onInvokeTask (core.js:28767:1)
    at _ZoneDelegate.invokeTask (zone.js:405:1)
    at Zone.runTask (zone.js:178:1)
    at drainMicroTaskQueue (zone.js:585:1)
    at ZoneTask.invokeTask [as invoke] (zone.js:491:1)
    at invokeTask (zone.js:1661:1)

Completed
Last Updated: 12 Nov 2025 14:33 by ADMIN
Release 2025 Q4

We use WPF Report Viewer in our application. For testing, validation, and automation purposes, we need to:

  • Uniquely identify each element in the XAML rendered report contents to support automation.
  • Prevent the element ID changes. The generated item IDs must remain consistent as long as the report definition is not changed.

Completed
Last Updated: 12 Nov 2025 14:33 by ADMIN
Release 2025 Q4

I'm using the WinUI Report Viewer in my .NET 8 WinUI3 desktop application.  All my reports initially render and display correctly, however, when the user clicks on the Print Preview button to switch to the print preview view, it causes my app to crash. This only occurs when using Versions 19.1.25.521 and above of the Telerik.ReportViewer.WinUI package. If I roll the NuGet back down to versions 19.0.25.313 and below, my application happily switches between interactive and print preview view without error.

Interestingly, if I force the Report Viewer to start in print preview view (with ViewMode="PrintPreview" in the xaml), it displays without error (though the toolbar print preview button is not showing as being toggled).  I can then also switch to interactive mode once without error by toggling the print preview button. However, if I then attempt to switch back to the print preview mode, it again crashes.

Completed
Last Updated: 12 Nov 2025 14:33 by ADMIN
Release 2025 Q4

The Telerik Web Forms Report Viewer Form VS item template does not install the Telerik.Reporting.Services.WebApi package. However, the controller created with this template has a using statement for it.

Steps To Reproduce

  1. Create a new Web Forms project.
  2. Right click on the project name > Add > New Item...
  3. Choose Telerik Web Forms Report Viewer Form <REPORTING_VERSION>.
  4. Build the project.

Expected behavior
The build succeeds.

Actual behavior
The build fails due to the missing package.

Screenshots

Image

 

Completed
Last Updated: 12 Nov 2025 14:33 by ADMIN
Release 2025 Q4
The interactiveActionExecuting event of the Native Angular Report Viewer does not send the parameters provided with the action and there is no way to access them.
In Development
Last Updated: 12 Nov 2025 14:33 by ADMIN

I cannot localize the messages of the Angular and React report viewers using the suggested approaches:

The only alternative is to use the approach from the Localization of the HTML5 ReportViewer Explained - Telerik Reporting article, which I can do only by loading the string resources script in index.html of the SPA.

Completed
Last Updated: 12 Nov 2025 14:33 by ADMIN
Release 2025 Q4

The data source of my report contains grouping string values, among which are the '10000' and '1010Q'. These two values are always treated as the same string, and the corresponding records fall within the same report group, which is unexpected:

 

Completed
Last Updated: 12 Nov 2025 14:33 by ADMIN
Release 2025 Q4

When the WinForms Report Viewer is initialized from within the Form.Load Event, and the RefreshReport() method of the viewer is invoked before it is added to a parent form, the following exception will be thrown: 

Telerik.ReportViewer.WinForms.Licensing.UiLicensePresenter.ShowWatermark(Action showWatermarkCallback)
   at Telerik.ReportViewer.Common.TelerikLicensePresenterBase.PresentWatermark(Action showWatermarkCallback)
   at Telerik.ReportViewer.WinForms.WinViewer.OnPaint(PaintEventArgs eventArgs)
   at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer)
   at System.Windows.Forms.Control.WmPaint(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(HWND hWnd, MessageId msg, WPARAM wparam, LPARAM lpa

 

Completed
Last Updated: 12 Nov 2025 14:33 by ADMIN
Release 2025 Q4

When the parametersAreaVisible property of the report viewer is set to true, the parameters area of the viewer should be open by default if a report that has visible parameters is being previewed.

However, when a mobile device is used, the parameters area is closed by default.

Additionally, the arrow used to open the parameters area is hidden by default. The device orientation needs to be toggled to horizontal and back for the arrow to appear.

In Development
Last Updated: 11 Nov 2025 13:45 by ADMIN

The Initialize method in ReportViewer.cs is called from both the OnLoaded and OnApplyTemplate methods, which in turn calls the AttachModelEventHandlers method. This leads to it adding the event handlers to the model twice every time it is loaded. The DetachModelEventHandlers is only called once (in the OnUnloaded method), so if you keep unloading and reloading the control, it adds 2 event handler invocations but removes only one. This means each one is called at least twice (if you have only loaded the control once), then 3, 4, 5, etc times if you keep unloading and reloading it.

I've worked around this by adding code to my wrapper class to prune the duplicated handlers for now, but this needs fixing in the base code.

Unplanned
Last Updated: 11 Nov 2025 12:02 by Mikhail
Created by: Mikhail
Comments: 0
Category: Reporting
Type: Feature Request
0

Currently, there is an MCP server that allows for integrating and developing report viewers, report designers, and Reporting REST APIs through Copilot. Consider allowing end users without Telerik Reporting experience to also build reports using AI.

 

Unplanned
Last Updated: 11 Nov 2025 09:38 by Support
I set the OwnerPassword and UserPassword device settings when exporting to PDF, and when I try to open such a PDF on a Mac with Safari, Preview, etc. the document appears blank after providing the password.
Duplicated
Last Updated: 10 Nov 2025 16:25 by ADMIN
Created by: Tamart
Comments: 1
Category: Reporting
Type: Bug Report
0
Hi Team
We purchased a reporting component and need to use a table of contents for our reports
The table of contents does not support right to left - for Hebrew/Arabic language
This is really problematic and seems to me a basic need that should be included in the service
We expect a solution soon
Thank you
Unplanned
Last Updated: 10 Nov 2025 09:29 by ADMIN
Created by: Rudá Cunha
Comments: 1
Category: Reporting
Type: Feature Request
0
I have a case where I need to allow the hyphen (-), but currently I don't have a way to remove this character from the rule to add the FormulaPrefix.

I would like to request the addition of FormulaPrefixCharacters.
Unplanned
Last Updated: 10 Nov 2025 08:46 by Punit
Created by: Punit
Comments: 0
Category: Reporting
Type: Feature Request
1

In MSSQL, you may use syntax like 'StoredProcedureName;1' to indicate stored procedure versioning, but it is not yet supported by Telerik Reporting.

I use such syntax and need to remove the version to make this work in Telerik Reporting.

It would be great if you also added support for versioning in MSSQL stored procedures.

Unplanned
Last Updated: 10 Nov 2025 06:19 by ADMIN
Scheduled for 2026 Q1
I have 2 Date parameters on my report. The "Start Date" parameter defaults to today, and the "End Date" defaults to the "Start Date" + 1 Year.

This works fine in the Report Designer, e.g., when the Start Date is changed in preview mode, the End Date value is recalculated.

However, this behavior does not work in the Blazor Native Report Viewer.  When the page first renders, the two dates are shown correctly, but if the Start Date is changed, the End Date is not recalculated.
Unplanned
Last Updated: 10 Nov 2025 06:19 by ADMIN
Scheduled for 2026 Q1
I have cascade parameters that depend on other parameters (check the Product Line Sales report for an example). I have set these parameters with `autoRefresh` of `false`. In the Standalone Report Designer, once I change the value of a parameter, the dependent parameter also changes automatically. However, this is not the case in the Native Angular report viewer.
Unplanned
Last Updated: 10 Nov 2025 06:19 by ADMIN
Scheduled for 2026 Q1
I have a string parameter with `autoRefresh` set to `true`. In the report viewer, it displays a textbox as a parameter editor. However, the report viewer refreshes on every "keydown" event, which can be frustrating for users. In the Standalone Report Designer, the report is refreshed only after the textbox is unfocused.
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