Unplanned
Last Updated: 29 Oct 2025 08:21 by Nicolas

I have a .NET project. I tried to add a CS-based report to it using the Visual Studio item template. However, when I opened it, I encountered an error message, which wasn't helpful.

After reaching out to the technical support, I was told that the Visual Studio Report Designer was not supported in .NET projects, and the alternative was either to open the CS-based report through the Standalone Report Designer or use TRDP reports (recommended for new reports) instead.

It would be nice if there were some warning about this, as it would save me some time and confusion, as at first, when I encountered the error message, I took the assumption that something was corrupted with my project.

Pending Review
Last Updated: 28 Oct 2025 15:05 by Sergii
Created by: Sergii
Comments: 0
Category: Reporting
Type: Feature Request
0
Distribute AdventureWorks database as .bacpac file beacuse it is impossible to have database without local sql server instance on Windows host (mssql can work in docker under linux as well)
Duplicated
Last Updated: 28 Oct 2025 13:24 by ADMIN
When I set SkipBlankPage of the report to True and there is no significant content, the Html5 Viewer displays the server-side error message "The current data set presented in the report did not produce any significant content..." rather than the one specified in the viewer's string resources file noPageToDisplay property.
Completed
Last Updated: 28 Oct 2025 07:51 by ADMIN
Release 2025 Q4
I just rendered the attached report PDF with 19.2.25.813. The underlying text is garbaled, meaning search and copy don't work.
Unplanned
Last Updated: 27 Oct 2025 11:59 by ADMIN
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
Unplanned
Last Updated: 24 Oct 2025 15:44 by ADMIN
Hi,

Currently, if Thread.CurrentThread.CurrentCulture set to tr-TR (can be also reproduced with az-AZ and maybe some other cultures) some tags are ignored in HtmlTextBox, but they work if typed in UpperCase. This can be reproduced with any supported tag which contains letter "i" like "div" or "li".

For example, we have two ol list but one with LI and the other one with li tags:

<ol>
  <LI>first</LI>
  <LI>second</LI>
</ol>

<ol>
  <li>first</li>
  <li>second</li>
</ol>

This is how it is rendered in PDF:


When the current thread culture is set to Turkish (tr-TR), the lowercase and uppercase conversion rules differ from English — especially for the letter "i".

  • In Turkish:

    • "i".ToUpper() → İ (with a dot)

    • "I".ToLower() → ı (dotless i)

Our assumption that the Telerik HtmlTextBox internally parses and maps HTML tags by converting them to uppercase. When the Turkish culture is active, this conversion causes tag names to break, which is not a valid tag, so ordered lists fail to render.

Best regards,
Denis

In Development
Last Updated: 24 Oct 2025 09:27 by ADMIN
Scheduled for 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

 

In Development
Last Updated: 23 Oct 2025 15:37 by ADMIN
Scheduled for 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:

 

Unplanned
Last Updated: 23 Oct 2025 14:11 by ADMIN
Scheduled for 2026 Q1
Currently, the auth token is not yet passed from the client to the service. For that reason, it would be nice if the bearer token can be passed with the Web Report Designer API Requests.
Unplanned
Last Updated: 23 Oct 2025 14:10 by ADMIN
Scheduled for 2026 Q1

WebReportDesigner (Blazor) - permission to restrict "Build new data connections" and allow to use only "Select from existing data connections".

It isn't required, but would be nice have button "Test connection" in the bottom enabled to verify predefined connection

Unplanned
Last Updated: 23 Oct 2025 03:25 by Tommy
Scheduled for 2025 Q3

Currently, when you set SplitWorksheetOnPageBreak to True, the Excel Sheet name is formed from the DocumentName or ReportName and the number of the page.

It would be very helpful if the report authors can manipulate these names with Expressions.

Need More Info
Last Updated: 17 Oct 2025 10:30 by ADMIN

Use SqlDataSource SelectCommand xml element instead xml attribute - it allows to write complex sql requests in any tool and just put it into xml without changes and have it well-formatted and readable:

So, instead of

save it as

 

or even

Unplanned
Last Updated: 16 Oct 2025 13:20 by ADMIN
Scheduled for 2026 Q1

In the latest Reporting version, the interface of the report viewer allows users to set the value of a multiselect report parameter to an empty collection but not make it null.

In some scenarios, reports rely on parameters being null to filter their data and this makes them unusable in the latest version.

Unplanned
Last Updated: 15 Oct 2025 11:48 by ADMIN
Created by: Andrew
Comments: 5
Category: Reporting
Type: Feature Request
18

Images taken with a mobile device are sometimes displayed in PictureBox  rotated by 90, 180 or 270 degrees. The reason is that whenever a photo is taken, the device saves its current accelerometer orientation into a corresponding Exif tag with the image metadata, so this info is then read and taken into account by our Report Designer.

Unplanned
Last Updated: 14 Oct 2025 15:00 by Courtney

ADA Accessibility is a priority for our customers, so we are aiming to ensure logical tabbing order for keyboard users.

I've noticed that the RowHeadersPrintOnEveryPage attribute, while very useful for creating more readable PDF exports, seems to result in some strange screen reader behavior when set to True.

The first problem is with the strange tabbing order in the live environment. The second column header is the first to receive focus, followed by the remaining column headers, then the data fields under the first column receive focus in a vertical list, until finally the first column header receives focus. Without the default RowHeadersPrintOnEveryPage setting (False), the first column header is the first to receive focus, which is expected. 

In addition to the wrong tabbing order, the RowHeaderPrintOnEveryPage causes the screen reader to announce the incorrect column associated with a particular cell. I use the Windows Narrator. Other screen readers may result in slightly different behavior. 

In Development
Last Updated: 10 Oct 2025 15:06 by ADMIN
Scheduled for 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

 

Unplanned
Last Updated: 10 Oct 2025 11:30 by Lukas

Currently, the is permission for disabling saving, but it disables only the "Save" button.

I would like to be able to disable the "Save As" button and keep the "Save" button active, or vice-versa.

Won't Fix
Last Updated: 09 Oct 2025 14:27 by ADMIN
Scheduled for 2025 Q4

I am rendering reports locally using the report processor. When I use the RenderReport method after processing MS Office Documents and PDF files with the Spire. Office, it causes the text of the report rendered with Telerik Reporting to get truncated:

using Telerik.Reporting;

Spire.Doc.Document document = new Spire.Doc.Document();

var wordDocPath = "./wordtest.docx";
var pdfFilePath = System.IO.Path.Combine("../../../", "wordtest.pdf");

document.LoadFromFile(wordDocPath);

Spire.Doc.ToPdfParameterList toPdf = new Spire.Doc.ToPdfParameterList();
//toPdf.AutoFitTableLayout = true;
document.SaveToFile(pdfFilePath, toPdf);
document.Close();

var reportProcessor = new Telerik.Reporting.Processing.ReportProcessor();
var reportPackager = new ReportPackager();

string sourceReportFile = "./Static Broken CSU Analysis.trdp"; ;

using (var sourceStream = System.IO.File.OpenRead(sourceReportFile))
{
    var report = (Report)reportPackager.UnpackageDocument(sourceStream);

    var deviceInfo = new System.Collections.Hashtable();

    var reportSource = new InstanceReportSource();

    reportSource.ReportDocument = report;

    Telerik.Reporting.Processing.RenderingResult result = reportProcessor.RenderReport("PDF", reportSource, deviceInfo);


    if (!result.HasErrors)
    {
        string fileName = result.DocumentName + "." + result.Extension;
        string filePath = System.IO.Path.Combine("../../../", fileName);

        using (System.IO.FileStream fs = new System.IO.FileStream(filePath, System.IO.FileMode.Create))
        {
            fs.Write(result.DocumentBytes, 0, result.DocumentBytes.Length);
        }
    }
}

If I comment out the section that is converting the totally unrelated word file to pdf and run it again, it does not clip.

Unplanned
Last Updated: 07 Oct 2025 12:24 by ADMIN
Scheduled for 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)

Unplanned
Last Updated: 03 Oct 2025 13:42 by ADMIN

This is related to Ticket ID 1699907.

Currently, the WinForm report viewer fetches configuration (specifically the connection string for any named connection strings defined in reports) directly from appsettings.json, however, it would be useful if the report viewer could take into account an injected IConfiguration since there are scenarios where the configuration may not exist in appsettings.json or a preferred or more up to date user selected value has been added to the configuration from a different source (such as a userSettings.json or secrets.json).

Some background of my use case:

I have a desktop WinForms application targeting .NET 8.0. It usesTelerik.Reporting 19.2.25.813 and Telerik.ReportViewer.WinForms 19.2.25.813 to display reports.

The reports are TRDX files designed with the 64-bit version of "Report Designer".  The report viewer is being displayed in a dedicated WinForm named FrmReport which configures the reportViewer control to use a UriReportSource pointing to the folder on the user's C:\ drive containing the report files. The reports are designed to use a named connection called ReportsConnection which is configured/saved as a shared connection with Alias ReportsConnection in Report Designer.

The default reports connection string is saved in the appsettings.json file.  Upon application startup users select a database connection from a list of saved/remembered connections and the desktop WinForms application saves the user selected ReportsConnection to a configuration file named userSettings.json.  Both appsettings.json and userSettings.json are configured as sources for IConfiguration with reloadOnChange = true.  After a user selects a database connection and the selected connection string is written to userSettings.json, the configuration is reloaded so that the injected IConfiguration from the service container will have the new, user selected value for ReportsConnection.  At this point, IConfiguration has the updated the named ReportsConnection with the desired connection string, which almost always differs from the default one defined in appsettings.json.

However, when loading the reportViewer, the reports unconditionally connect to the server and database defined in the default connection string from appsettings.json, not the user-selected connection string even though the injected IConfiguration has the updated user selected connection string.
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