Hello József Király,
Thank you for the question.
We consider the requested functionality as a finished standalone application rather than a RadTreeView control to start from. Therefore, we currently do not have plans to implement it in RadTreeView itself. However, you can refer to our Examples application, section Integration >> File Explorer
. It demonstrates how you can build a tree of the directories on your system. As to the icons, you can refer to the article that my colleague Georgi has given.
the Telerik team
Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items.