Last Updated: 23 May 2024 16:50 by ADMIN
Scheduled for 2024 Q3

I have projects on .NET Core and I want to use the System.Text.Json serializer that is the new default, but reporting relies on Newtonsoft.Json.



There are two approaches that can be taken right now to solve this:

OPTION 1: define separate endpoints (services, projects) for the different tasks - they can still use the same database layer through a shared project, depending on the architecture you have. This would let you have separated services with the appropriate serializers without custom attributes and code (see below). For example, create a separate project for the reporting REST services.

OPTION 2: add some custom decoration on the endpoints so you can choose which serializer is used on each, you can find some examples here: https://stackoverflow.com/questions/59650907/how-to-configure-two-json-serializers-and-select-the-correct-one-based-on-the-ro - the point being to register a serializer depending on the endpoint based on your own code rather than let the framework put one in for all endpoints.

NOTE: This would be a breaking change.


Last Updated: 23 May 2024 08:34 by Martin

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.

Last Updated: 23 May 2024 03:40 by Tony
Created by: Dan
Comments: 5
Type: Feature Request
Please consider adding an RTF Text Box control to your report toolbar.   Crystal reports has this ability which we've used on many of our reports.  Currently the only work around for changing the RTF data to something that Telerik Reports will print cleanly, is to create a user defined custom function.
Last Updated: 16 May 2024 08:19 by Lars Rikard
Created by: Lars Rikard
Comments: 0
Type: Feature Request

The WPF Report Viewer should support rounded corners.

Currently, I am not allowed to do the following:

<telerikReport:ReportViewer Grid.Row="1"
                            ReportSource="{Binding ReportSource}">
        <Style TargetType="telerikReport:ReportViewer" BasedOn="{StaticResource {x:Type telerikReport:ReportViewer}}">
            <Setter Property="BorderBrush" Value="{telerik:Windows11Resource ResourceKey=PrimaryBorderBrush}"/>
            <Setter Property="BorderThickness" Value="1"/>
            <Setter Property="Margin" Value="5"/>
            <Setter Property="CornerRadius" Value="4"/>

Need More Info
Last Updated: 14 May 2024 08:48 by ADMIN
Created by: Simon
Comments: 2
Type: Feature Request

Good afternoon,

As per support ticket 1650746, could I please request that Telerik reporting could one day work with minimal APIs as opposed to controllers?

There is also the dependency on Newtonsoft for the JSON side of things. Up until trying to implement reporting, I had removed the Newtonsoft nuget package and was trying to use System.Text instead throughout my project. Perhaps in time, it could be a bit more agnostic when it comes to the provider.

Many thanks,


Last Updated: 10 May 2024 11:59 by ADMIN
Created by: Jai
Comments: 5
Type: Feature Request
If there are parameters which are not mandatory, the reports automatically when loaded. In actual scenarios, there may be a lot of data being processed as the parameters may be empty. Developer should have an option on report level, say, AutoRun as true or false. The developer could decide if report needs to auto run.

Last Updated: 03 May 2024 15:28 by Bradley

At the moment, a whole words are removed from text until it becomes short enough to fit in the text box, and this is the only available behaviour.

There should be an option to put ellipsis or clip the text to the textbox width instead (like CSS text-overflow "ellipsis" and "clip").

There's also an older discussion here:

Last Updated: 02 May 2024 12:24 by ADMIN
Created by: Prashant
Comments: 5
Type: Feature Request

we need to have complete End User Tutorial for Web Report Designer, where all the excel like features need to be demonstrated.

including Pivot etc.

Last Updated: 30 Apr 2024 13:45 by ADMIN
With the standalone desktop designer it would be great to be able to override the version of the report file so that it can be used in dev/test/historical environments where we are still referencing an older version of the Telerik Reports libraries.
In Development
Last Updated: 30 Apr 2024 12:45 by ADMIN
Scheduled for R3 2022

At the moment it's only possible to have your reports in old-fashioned projects.

It should be possible to add/design reports to SDK-style projects. That should work no matter what target framework is (.NET Core, .NET Standard or .NET Framework).

Last Updated: 26 Apr 2024 08:29 by Simon

When I render one of my reports I receive the error message  “A generic error occurred in GDI+”.

I figured out that one HtmlTextBox receives quite a long HTML from the data source - exceeds 32 768 characters. In my experiments, the error starts appearing if the text is longer than 32 775 chars.

In this case, the Reporting engine shouldn't throw a misleading GDI+ error but instead throw a more specific exception.

Last Updated: 25 Apr 2024 14:15 by Steve
The current version(R3 2023) of the MsSqlServerStorage implementation uses the old System.Data.SqlClient data provider which forces to use a different connection string from my application because keywords such as 'authentication' are not supported by the older provider.
Last Updated: 24 Apr 2024 12:09 by Aldo

The WebServiceDataSource wizard in the Web Designer doesn't let you construct Expressions for the Parameter values. The same functionality is present in the Standalone Report Designer.

The SqlDataSource Wizard of the Web Designer also allows the creation of Expressions for the Parameter values.

It would be convenient if the report creators were allowed to create the Expressions for WebServiceDataSource parameter values directly in the wizard. Currently, you need to type or paste the Expression manually.

Last Updated: 23 Apr 2024 01:23 by Tommy

Coming from having developed many SSRS reports one thing I think telerik is missing is a nicer visualisation of row and column grouping in a table. SSRS does this really well as shown in the screenshot below where we can easily see which rows belong to the detail and 2 other groups.

I think this would be a very useful addition to the telerik designers!


Last Updated: 15 Apr 2024 08:49 by ADMIN

In the non-native angular report viewer we were using a customized template to change the order of the buttons and also to add custom buttons. We want to migrate to the Native Angular Report viewer but it lacks toolbar customization options. We need to be able to change the order and hide existing toolbar functions. Also we need the ability to define custom buttons with custom logic that executes when the button is pressed. 

I've tried to create a sub-class of the ReportingAngularViewerComponent and define a custom template for the toolbar, but the problem is that some of the core toolbar buttons (like zoom and pager) use custom local Telerik components that aren't exported from the ReportingAngularViewerModule, so I can't use those directly. 

It would be great if you can export all components used in the ReportingAngularViewerModule or provide an alternative way to customize the toolbar (may be similar to how you allow customization of the toolbar for the Editor control where users can define what toolbar commands are available, order them as they like and also define custom commands)

Last Updated: 10 Apr 2024 08:27 by ARECNeprix
Created by: Subin
Comments: 4
Type: Feature Request
I need an option to set line height for contest in report.
Last Updated: 08 Apr 2024 09:38 by ADMIN
Created by: Peter
Comments: 1
Type: Feature Request

The current htmltextbox on the telerik reporter designer does not support html tags for <table>

There is a work around which creates the html text to an image but the quality is not great but more importantly the word wrap functionality is lost.





Last Updated: 08 Apr 2024 09:29 by Víctor

As an implementer, I sometimes need to trigger the Web Report Designer's commands programmatically. For example, saving the report definition when an external button is clicked.

Exposing an API for invoking the designer's commands would be of great help in implementing such functionality.

Last Updated: 01 Apr 2024 09:52 by Andrew

It would be great if the expressions were validated before leaving the expression editor rather than only finding out I missed a bracket ')' when running the report.

Under Review
Last Updated: 01 Apr 2024 09:46 by ADMIN

Currently the Webdesigner makes up to 6(?) and the Standalone Designer as much as it needs without(?) limit.

Especially the latter case can quickly lead to a lot of connections, saturating the max allowed connections of a sql server, which also leads to other services depending on a sql server connection to fail.

As far as I've seen, this only happens with Charts in Design mode.

So there are multiple ways to handle this:

  • Being able to specify the max concurrent connections in the designer
  • Make the usage of the DataSource more efficient by only loading the data once (like in the report viewer)
  • Being able to turn off the chart preview in the Designer (By configuration, not with a user settable option)

See the attached report for a simple example:

It contains a single Datasource, which is a postgres query which simply waits 10s before returning the result.
After updating the DataSource to something which works for you and saving, simply reopen the report and see how many connections are opened in parallel.

With kind regards
Dominik Rothert

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