Content picker in custom MVC report?

Hi!

Henrik made a nice example here how to add a MVC report in the Reports section, nice.

https://world.episerver.com/blogs/Henrik-Fransas/Dates/2016/3/create-custom-report-in-mvc-with-excel-export/

But how do I add a content picker into my report? Looks like the reports are "dojo free" and the other standard reports in Epi are old .aspx files.

Thanks!