Hello Supports,

I want to try and install Nuget packages Telerik.Reporting.Services.AspNetCore for my Asp.net Core project but it isn't found.

when I go to the option "Manage Nuget packages", these are no available the packages to download (see the attached file).
Is it missing from the private nuget feed ?

Thank You.

 

Hello Telerik Reporting Community,

We have released a new version of Telerik Reporting today, 2024 Q1 (18.0.24.130). Please update your existing installation at your earliest convenience.

You can review the Legacy Installer Vulnerability - Telerik Reporting article to learn more details about why we are recommending customers to update.

To get the new version, take the following steps:

1. Go to Downloads | Your Account. 
2. Select Telerik Reporting.
3. Download the msi installer file, run it, and follow the steps to completion.

Notes

As the KB article explains, the issue pertained only to the old installer component, and not Telerik Reporting contained within the installation package. It does not affect any applications you’re using Telerik Reporting with.

If you have a rare situation where you cannot update the PC installed version, there are various ways to keep a project using an older version of reporting even though the PC has a newer version installed.

• NuGet Option: Update your projects to use the Telerik Reporting NuGet packages, instead of local DLLs (see https://docs.telerik.com/reporting/getting-started/installation/installation-approaches#using-nuget-packages).

• Copied Assemblies Option: Copy the older version’s DLLs to the project directory, then update the project references to use the copied assemblies (instead of the assemblies in C:/Program files (x86)/Progress/Telerik Reporting [older version]/)

We highly recommend you open a Technical Support Ticket if you have a complex situation and would like to ask questions before updating the PC’s installed version. You can open a Support Ticket here => https://prgress.co/DevToolsSupport.

We have developed our back office app using web forms and Telerik reporting integrated to VS2022 (version Telerik_Reporting_2025_Q3_19_2_25_813). The application is deployed on Windows server 2022 which is not connected to Internet. Also, for security reason, the customer uses many workstations that are not connected to Internet.

With previous versions of Telerik Reporting we noticed that some Telerik's CSS files are missing because the app is trying to access them on Internet. In that case we could not open Telerik reports from PC that is not connected to Internet while it was working correctly from PC connected to Internet.

Therefore, we copied required files to a local folder (kendo.blueopal.min.css and kendo.common.min.css) and everything seemed ok.

I am not sure if the following problems appear after upgrade to the latest version but we noticed the following:

When we try to open the report from the PC which is not connected to Internet we could find following errors in the Chrome console:

DevTools failed to load source map: Could not load content for http://10.10.51.100/CEN/TCM/Content/kendo.common.min.css.map: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE
DevTools failed to load source map: Could not load content for http://10.10.51.100/CEN/TCM/Content/kendo.blueopal.min.css.map: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE

When I do the same from my PC which has Internet connection, these errors do not appear.

I have found some explanations that these errors could be ignored but the problem is that the report viewer does not display the content after these error appear.

To summarize, the same report which works correctly from my PC connected to Internet does not work from PC disconnected from internet. And both PCs are connected to the same instance of app.

On the production server, we noticed this problem when we limited IIS memory as its process used a lot of memory, and the server started running slowly. When we remove IIS memory limit, we can see errors in the console but the report shows the content correctly.

Is there a way to deploy Telerik Reporting app to not lookup to files located on Internet.

By the way, on the offline PC I see an old layout of report viewer controls and I see pages but the pages are empty:

 On my PC I see different toolbar and the report shows data:

 

ReportDesigner - is it possible to restrict "Build new data connections" and allow to use only "Select from existing data connections" ?

This question is regarding "Configure XXX_DataSource" window:

Hello, I'm new to web development, and I'm currently facing an issue with viewing reports on my website when it's uploaded to the server using IIS. The problem is that sometimes I can't view the Report Viewer, but other times I can. When I can't view it, I get this error message: "Error registering the viewer with the service. An error has occurred. Access to the path is denied." Where should I start checking for this issue?

Hello,

After updating to the latest version of Telerik Reporting, all the PDFs we export from our software have an issue where text can no longer to copied correctly out of them, instead resulting in gibberish being copied.

We have tried adjusting several options in the DeviceInfo parameter of RenderReport, (from https://docs.telerik.com/reporting/doc-output/configure-the-export-formats/pdf-device-information-settings) such as ComplianceLevel, EnableAccessibility, and FontEmbedding. None of these corrected the issue.

The version of Telerik reporting we were on (where the exports were working) was 2024_Q4_18_3_24_1218
We are now on the latest version 2025_Q3_19_2_25_813

I have attached PDFs exported from both versions.

Please help!

Good Morning,

i get empty pages in word from processing from telerik designer

Hi I am using telerik report in web forms. we have implement it is from physical file i..e report definition  is present in SQL columns. will be modified at runtime and save a file in temp path. and set in to report viewer.

in c# 
 var clientReportSource = new Telerik.ReportViewer.Html5.WebForms.ReportSource();
 clientReportSource.IdentifierType = IdentifierType.UriReportSource;
 clientReportSource.Identifier = strXml;

how it can be used in in-memory or  without using physical file as references.

Hello,

we have an existing and large reporting project which we moved from .NET Framework 4 to .net 8 now (<TargetFramework>net8.0-windows</TargetFramework>). Build the project in Visual Studio is fine and successful.

When I try to open a report of this project in the ReportDesigner by selecting the .cs file I get a dialog in which thje correct Designer und project file is shown. Pressing Finish leads to the following error which I do not understand because the TargetFramework point to a windows plattform:

Build in progressMSBuild-Version 17.14.18+a338add32 für .NET Framework
Der Buildvorgang wurde am 16.09.2025 13:43:02 gestartet.
Projekt "D:\Workspace\MainNext\Components\Report\de.ser.Reporting\de.ser.Reporting\de.ser.Reporting.csproj" auf Knoten "1" (Standardziele).
C:\Program Files\dotnet\sdk\9.0.304\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.DefaultItems.targets(142,5): error NETSDK1136: Die Zielplattform muss auf Windows festgelegt werden (üblicherweise durch Einbeziehen von "-windows" in die TargetFramework-Eigenschaft), wenn Windows Forms oder WPF verwendet wird oder auf Projekte oder Pakete verwiesen wird, die dies tun. [D:\Workspace\MainNext\Components\Report\de.ser.Reporting\de.ser.Reporting\de.ser.Reporting.csproj]
Die Erstellung des Projekts "D:\Workspace\MainNext\Components\Report\de.ser.Reporting\de.ser.Reporting\de.ser.Reporting.csproj" ist abgeschlossen (Standardziele) -- FEHLER.
Fehler beim Buildvorgang.
"D:\Workspace\MainNext\Components\Report\de.ser.Reporting\de.ser.Reporting\de.ser.Reporting.csproj" (Standardziel) (1) ->
(_CheckForInvalidWindowsDesktopTargetingConfiguration Ziel) -> 
  C:\Program Files\dotnet\sdk\9.0.304\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.DefaultItems.targets(142,5): error NETSDK1136: Die Zielplattform muss auf Windows festgelegt werden (üblicherweise durch Einbeziehen von "-windows" in die TargetFramework-Eigenschaft), wenn Windows Forms oder WPF verwendet wird oder auf Projekte oder Pakete verwiesen wird, die dies tun. [D:\Workspace\MainNext\Components\Report\de.ser.Reporting\de.ser.Reporting\de.ser.Reporting.csproj]
    0 Warnung(en)
    1 Fehler
Verstrichene Zeit 00:00:01.77

How to solve this error?

Regards,

Chris

Hi,

there probably an issue with ASPNETCORE_ENVIRONMENT for WebReportDesigner: can't apply anything than "Development".

Steps to reproduce:

Have installed Telerik_Reporting_2025_Q3_19_2_25_813.msi in order to have installed Examples.

In Examples find out

"\CSharp\.NET 8\BlazorIntegrationDemo"

in CSharp\.NET 8\BlazorIntegrationDemo\Properties\launchSettings.json
clone section CSharp.Net8.BlazorIntegrationDemo as CSharp.Net8.BlazorIntegrationDemo.Development.Test, where change

"ASPNETCORE_ENVIRONMENT": "Development" -> "ASPNETCORE_ENVIRONMENT": "Development.Test"

you should get something like:
---
    "CSharp.Net8.BlazorIntegrationDemo.Development.Test": {
      "commandName": "Project",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development.Test"
      },
      "applicationUrl": "http://localhost:57349"
    }
---

profile CSharp.Net8.BlazorIntegrationDemo still works, but when I run for profile CSharp.Net8.BlazorIntegrationDemo.Development.Test I get 
---
Microsoft.AspNetCore.Components.Server.Circuits.RemoteRenderer: Warning: Unhandled exception rendering component: Could not find 'telerikReportViewerInterop.createReportViewerWidget' ('telerikReportViewerInterop' was undefined).
Error: Could not find 'telerikReportViewerInterop.createReportViewerWidget' ('telerikReportViewerInterop' was undefined).
    at http://localhost:57339/_framework/blazor.web.js:1:537
    at Array.forEach (<anonymous>)
    at l.findFunction (http://localhost:57339/_framework/blazor.web.js:1:505)
    at b (http://localhost:57339/_framework/blazor.web.js:1:5248)
    at http://localhost:57339/_framework/blazor.web.js:1:3041
    at new Promise (<anonymous>)
    at y.beginInvokeJSFromDotNet (http://localhost:57339/_framework/blazor.web.js:1:3004)
    at gn._invokeClientMethod (http://localhost:57339/_framework/blazor.web.js:1:62730)
    at gn._processIncomingData (http://localhost:57339/_framework/blazor.web.js:1:60119)
    at connection.onreceive (http://localhost:57339/_framework/blazor.web.js:1:53760)
---