We are currently on Kentico 12 and are making the switch to 13 MVC Core.
One of our most important and widely used widgets is a custom "Control Wrapper" widget with a "File System Selector" type field, that allows the user to select a File location (via a of an .ascx user control, which then gets loaded on the page.
These user controls get and update external data from our CRM system via a REST API middleware, and display and allow our customers to view and update data. I am new to MVC and am having difficulty coming up with a similar solution, since the concept of user controls doesn't exist in MVC.
Is there a way to do this, or are there any suggestions on how to replicate this functionality in Kentico 13?