Hi Andre,

Thank you for the attached files and the additional information!

I assume that the data retrieval methods that you are trying to use in the report are part of the DataAccessLayer assembly, which is actually referenced as a project reference:

  <ItemGroup>
    <ProjectReference Include="..\..\DataAccessLayer\DataAccessLayer.csproj">
      <Project>{28d5358b-f4aa-46f6-8a44-adf7c31a5c74}</Project>
      <Name>DataAccessLayer</Name>
    </ProjectReference>
  </ItemGroup>

I see that you have already added a Teleirk.Reporting section in the app.config file of the project, and that the assembly is referenced there:

    <configSections>
        <section name="Telerik.Reporting" type="Telerik.Reporting.Configuration.ReportingConfigurationSection, Telerik.Reporting, Version=20.0.26.211, Culture=neutral, PublicKeyToken=a9d7983dfcc261be"/>
    </configSections>

    <Telerik.Reporting>
        <assemblyReferences>
            <add name="DataAccessLayer" version="1.0.0.0"/>
        </assemblyReferences>
        <processing>
            <graphicsEngine engineName="PlatformDependent"/>
        </processing>
        <AIClient friendlyName="" model=""/>
    </Telerik.Reporting>

However, the Visual Studio Report Designer is a part of the Visual Studio application, so it is necessary to allow the assembly in its configuration file - devenv.exe.config. Since you are using VS 2022, you should be able to find it at the following location:

C:\Program Files\Microsoft Visual Studio\2022\Professional\Common7\IDE

Please try adding the Telerik.Reporting section to that file. Note that you may need to place a copy of the Teleirk.Reporting.dll in that same directory, so that the reporting section can be loaded successfully.

I hope that this will help. Please do not hesitate to open up a support ticket if you need further assistance.

Regards,
Dimitar
Progress Telerik