RadTree - How to save expanded state

Question

We are using Telerik 2017.1.228.45 RadTree controls. We have implemented RadTree contract inside a usercontrol and it's getting called through a master page. all Radtree nodes has a customUrl field populated,so when they are clicked on the same page, a user control appears and when some changes are made to that user control and is closed, RadTree loses its expanded state.

​ Is there a way to persist RadTree in that expanded state please? if yes, then how or if you could point me towards the right direction, that'll be great.

Thank you

Answer 1

This answer has solved my issue:

http://www.telerik.com/support/code-library/save-the-expanded-state-of-the-treenodes-when-the-treeview-is-being-bound-upon-each-postback