By design the FileExplorer control does not provide such functionality, but you could do it by using the approach described in this live demo
and a KB article: Hide certain directories and files in RadFileExplorer
in order to filter the folders which you do not want to be displayed.
You have to customize it the example in it in order to hide the specific folder only in the TreeView. The ResolveDirectoryAsTree()
method is called two times for each folder (once for the TreeView and once for the grid) so you could use it would be useful in for the implementation of a hide-folder-in-tree scenario.
I hope this would be helpful.
All the best,
the Telerik team
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