I understand that the ReportViewer has a very different paradigm from, say, the RadGridView.  However, I believe they should and could be much more similar.  With some fairly minor tweaks ReportViewer could be made to be a proper member of the C#/XAML/MVVM environment.  Particularly what is needed is a binding to the data source, just like RadGridView's "ItemsSource".

I've begun a discussion in the forum about this topic at https://www.telerik.com/forums/reporting-and-mvvm.  With Momchil's help I was able to create a workable solution for my scenario, but it required code that, in my opinion, I shouldn't have to write.

I'd be more that willing to chat about this further and provide more thoughts and details, but since we've made it all the way to 2024 without this being raised, I tend to assume the needs I've expressed may not be as universal as I'd assumed they would be.

Thanks!