Unable to get report parameters error when reporting REST service is running in Docker container

Hi Todor,

I added runtimeconfig.template.json file as described in the KB, but I have the same problem. Can you test it with my Demo projects please?

Hi Tursunkhuja,

There was a general .NET programming problem with the ASP.NET project, I want able to get it to work under any circumstance (Docker, Linux or IIS on Windows). Even when the site first runs, Index.html doesn't work.

I spent some time debugging and working on the non-Telerik issues and have it working.

• Once I enabled app.UseStaticFiles(), initial site navigation was working
• Your ReportsController.cs class didn't have the [ApiController] attribute. This is a serious problem, it would prevent the REST from being routed. you can always test this by going to mydomain.com/api/reports/formats
• I also fixed the Dockerfile. It would not have worked because it would have been impossible to compile the project, I can now confirm a Docker build and a WSL deployment build work as expected.

All of the above changes, and come clarifying code comments are available in my pull request => Reporting REST Service Support by LanceMcCarthy · Pull Request #1 · Tursunkhuja/Telerik-Reporting-REST-Service (github.com)

For your convenience, here's a screenshot from my Docker test. I verify the REST service is working by checking the api/reports/formats endpoint.

As a quick follow up, I wanted to let you know that I have updated my DevOpsExamples repository to include a Telerik Reporting REST service in the docker example.

• Code => DevOpsExamples/src/AspNetCore/MyAspNetCoreApp
• CI Workflow => DevOpsExamples/main_build-aspnetcore.yml
• Docker Hub => lancemccarthy/myaspnetcoreapp - Docker Image | Docker Hub

This means you can test this for yourself right now with a simple docker command:

docker run -d --name lance-reporting -p 80:80 lancemccarthy/myaspnetcoreapp:latest

Once the container is running, you can test the reports API http://localhost:80/api/reports/formats. You can also fetch Barcodes Report.trdp from it as well.

Hi Lance,

I'm still getting this error when I connect with my TestReportApp project. But the reporting service is working fine though. 

I am able reproduce this. It initially appears to be related to the default serialization being used in that .NET 6 REST project. Mainly, Telerik Reporting uses Json.NET and not System.Text.Json, so this could be what's happening... but I'm not sure yet. I will coordinate with Todor to work on a solution and then update you on the progress.

Okay, I have an answer for you. Default serializer problems is not relevant here because your Program.cs is already using AddNewtonsoftJson() in the services configuration.

Item 1

Make sure the Linux dependencies are actually getting installed in your environment (container or OS). You can ensure this this by moving the apt commands to the base section:

Important Notes:

• If you are not using Docker/containers, then you must manually install those items. Open a bash terminal inside the OS and run the same command the Dockerfile uses.

  • apt-get update \
        && apt-get install -y --allow-unauthenticated \
            libc6-dev \
            libgdiplus \
            libx11-dev \
         && rm -rf /var/lib/apt/lists/*

• If you are using containers, I recommend completely deleting the container before deploying it again. I noticed some problems where the container was not being recreated when deploying form Visual Studio, so it never had a chance to use the apt commands.

Option 2

The other reason you might be having a problem is incorrect parameter settings in the report viewer itself. Remove the null parameters array.

Demo

To verify this, you can again try my demo => https://github.com/LanceMcCarthy/DevOpsExamples/tree/main/src/AspNetCore (I pushed these changes a couple minutes ago).

Here's a screenshot at runtime: