Hi Pawel,
Thanks for using Syncfusion MVC Products.
We have revamped our ASP.NET MVC Tree control, which uses the ul-li elements in view to be rendered as Tree control using our extension. Hence it is required to create html list elements with id as the target id to the treeview.
Please refer the sample in the attachment.
Please let me know if you have any queries.
Best Regards,
Santhosh Kumar.A
sample treeview_1a492176.zip