Last Updated: 19 Jan 2023 16:02 by ADMIN

In this file t.folder is lowercase which should be Capital t.Folder


t.folder  throws error

 t.Folder return value


same or files vs Files

Last Updated: 30 Dec 2022 15:28 by ADMIN
Visual Studio 2022 cannot open reports in x86 mode. The same project works correctly in VS 2019.
Last Updated: 02 Dec 2022 12:13 by ADMIN
Last Updated: 29 Nov 2022 09:37 by ADMIN
Created by: Patrick
Comments: 1
Type: Feature Request


Have the possibility to have the "Select Case" or "Switch" function in the expressions.


Last Updated: 13 Oct 2022 06:34 by ADMIN

Product: Telerik ReportServer ( 2022 R2 SP1 )

I can't delete any report file (.trdp) after being uploaded to Telerik Reports Server (Web Management).

When I click delete an error message says 'An error occurred when trying to delete report, can't connect to agent service'
but the reports agent is running well and other commands like (upload report, rename) also work fine except for Delete.

So I had to delete the reports server's storage folder (~\Data), setup everything again and re-upload all my reports again each time I want to delete a report.

If you would please fix this critical problem in the next versions so I can use Telerik Reports Server again.

Please fix it ASAP. Thanks

Last Updated: 12 Oct 2022 09:05 by ADMIN
  • The Report Viewer component is not correctly creating DateTime type fields. It renders them of type textbox.
    The current version of the Telerik Reporting library is:
    We use Telerik UI for Blazor 3.6.1.
    We are using the Telerik.ReportViewer.Blazor library
Last Updated: 27 Sep 2022 07:09 by ADMIN

We are using Telerik reporting R2.2022 version in our project. Some of our reports have html link (created with tag “a”). If we preview those reports html link doesn’t act as an actual hyperlink, so it’s not clickable. We know that there is a HtmlTextBox limitation not to be interactive in WinUI report viewer. But this is important for us to be able to click on html link on WinUI and we need that functionality.  

I tested WinUI example project (CSharp.WinUIExample.VS2022.sln) and opened SwissQRBill.trdp report. The report has some links to the external source in internet, which is not clickable, but if you open it in Standalone report designer it’s clickable.  

Graphical user interface, text, application, email

Description automatically generated

Is it on your roadmap to implement that feature? 


Last Updated: 05 Sep 2022 14:35 by StillLearnin

Clicking the cancel button on the HTML5 report viewer show "Report processing was canceled" in the UI but the report is still being generated and rendered on the server.

In this old thread it is stated that it isn't possible to cancel the report generation on the server. Is that still the case?

Last Updated: 29 Aug 2022 18:54 by James
Many documents have repeating information that is irrelevant and needs to be untagged, or artifacted, so that assisstive technology does not share the information multiple times. Common examples of this situation are headers, footers, page numbers, and decorative images. In most cases, it is not necessary to read these document elements on each page, so we untag the information to prevent repetition for the person reading the document with assistive technology. Is there a way to mark a report section - e.g., the page header or page footer - as Untagged or Artifacted, and have those tags be exported to the PDF? It would save a ton of time having to manually go through several hundred pages and untagging them manually.
Last Updated: 25 Aug 2022 12:07 by James
Telerik Report Designer is one of the few report writing tools on the market that can export tagged PDF content. It's a major advantage of your solution. Why can it not be turned on by default, or enabled via a menu button. Better yet, how about including an Accessibility menu setting to allow for more detailed configuration of key elements?
Last Updated: 10 Aug 2022 08:30 by ADMIN

I am trying to get a basic example of the Web Report Designer working following the guide here but I keep getting this error message

in the console, I can see these errors

here is the razor page that contains the WebReportDesigner

@page "/report-designer"

@attribute [Authorize]

@using Telerik.WebReportDesigner.Blazor

<WebReportDesigner DesignerId="wrd1"
                   ToolboxArea="new ToolboxAreaOptions() { Layout = ToolboxAreaLayout.List }"
                   PropertiesArea="new PropertiesAreaOptions() { Layout = PropertiesAreaLayout.Categorized }" />

Any assistance would be appreciated

Last Updated: 28 Jun 2022 09:42 by ADMIN
Created by: Yip
Comments: 2
Type: Bug Report

Telerik report is showing error -

Method Name: Telerik.reporting.PictureBox.Set_Value - Parameter is not valid. 

 Above highlighted line gives an error during component initialize.

It was working earlier, but now showing this error, even there is no code change. Please help.


Your help is highly appreciated.

Jeetendra Kumar


Last Updated: 07 Jun 2022 11:45 by ADMIN
Created by: Anubhav
Comments: 1
Type: Feature Request

I would love to be able to get a log of the SQL generated by the designer/VS IDE upon running a report within a debugging environment. This would help me identify any issues and make performance improvements as well. thanks.


Last Updated: 24 May 2022 20:17 by ADMIN
Created by: Patrick
Comments: 2
Type: Feature Request


It could be userfull to have a way to dynamically prompt for user name and password for the database connection. The proposed solution to put the connection string in a report parameter exposes sensitive information. It could be an option in the "Configure SQL Data Source" where we could set a checkbox as "Prompt for user name and password". At the end, everything would be saved with the report definition except the user name and password. On the report rendering, the user name and password will raised a dialog box for user name and password for the report.



Last Updated: 13 May 2022 12:02 by ADMIN

Hi, after Updating to the latest version I'm getting this error:

System.InvalidOperationException: Headers are read-only, response has already started.
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpHeaders.ThrowHeadersReadOnlyException()
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpResponseHeaders.Microsoft.AspNetCore.Http.IHeaderDictionary.set_ContentType(StringValues value)
   at Microsoft.AspNetCore.Http.DefaultHttpResponse.set_ContentType(String value)
   at Microsoft.AspNetCore.Mvc.Formatters.OutputFormatter.WriteResponseHeaders(OutputFormatterWriteContext context)
   at Microsoft.AspNetCore.Mvc.Formatters.TextOutputFormatter.WriteAsync(OutputFormatterWriteContext context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ObjectResultExecutor.ExecuteAsyncCore(ActionContext context, ObjectResult result, Type objectType, Object value)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ObjectResultExecutor.ExecuteAsync(ActionContext context, ObjectResult result)
   at Microsoft.AspNetCore.Mvc.ObjectResult.ExecuteResultAsync(ActionContext context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeResultAsync>g__Logged|22_0(ResourceInvoker invoker, IActionResult result)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResultFilterAsync>g__Awaited|30_0[TFilter,TFilterAsync](ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResultExecutedContextSealed context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.ResultNext[TFilter,TFilterAsync](State& next, Scope& scope, Object& state, Boolean& isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeAlwaysRunResultFilters()
--- End of stack trace from previous location ---
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|25_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeFilterPipelineAsync()
--- End of stack trace from previous location ---
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Logged|17_1(ResourceInvoker invoker)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Logged|17_1(ResourceInvoker invoker)
   at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
   at Als.ALSolutions.WebSite.Startup.<>c__DisplayClass13_0.<<Configure>b__3>d.MoveNext() in C:\ALS_Git\ALSolutions V2\ALSolutions_V2\Als.ALSolutions.WebSite\Startup.cs:line 615


  1. Request URL:
  2. Request Method:


Last Updated: 04 Apr 2022 13:39 by ADMIN
Created by: Robert
Comments: 1
Type: Feature Request

Ability to split sections for use in Conditions and Formatting.

Example: Detail split into Detail-A and Detail-B where either or both may display based on a condition defined at the Section Split level.

For Crystal Report users (myself since 2008) this is a very important feature.

It allows a single report be used for detail or summary reporting as well as multiple conditions for display.

This is an example from CR:

Last Updated: 18 Feb 2022 15:50 by ADMIN


The Telerik Reporting REST service with CubeDataSource component that now can only be used with the .NET Framework.

We'd like to request that this component for .NET Core 6.

Thanks in advance.

Last Updated: 26 Jan 2022 07:51 by ADMIN
Created by: Ryan
Comments: 1
Type: Feature Request

I have a request that probably doesn't require much explanation. It would be helpful to allow comments in expressions created via the standalone designer to help explain particularly complex and infrequently encountered logic.


Last Updated: 14 Jan 2022 14:25 by ADMIN
Please.  Please.  Please add a setting that opens the Preview in Print Layout by default instead of Interactive Layout.  I understand the difference.  I understand that Interactive opens faster, but it is almost impossible for me to explain to my end-users why the preview doesn't actually look like the printed version until you click another button to toggle to Print Preview.  I hope you will consider this so that the hate mail in my inbox decreases.  :)
Last Updated: 06 Jan 2022 15:48 by ADMIN

When a report includes drill-down item(s), the report is run again each time the user expands a drill down item.  This is apparent in the demo at

I would like to see all of the drill-down data generated and delivered with the initial report, but collapsed and awaiting inspection.

Perhaps this would be an attribute of the drill-down element (pre-fetch versus re-run) so that developers can choose the most appropriate experience for their users  / conserve server resources.

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