You can use the server-side ItemCommand
event of the RadFileExplorer to intercept the rename operation and change the new name if you don't want it. For example:
sender, EventArgs e)
sender, RadFileExplorerEventArgs e)
//check e.newPath and change it if needed
newPath = e.NewPath;
Note that the rename operation in the RadFileExplorer is essentially a move operation to the same parent folder but with a different name. This is why in the event handler you need to execute your code for "MoveFile" and "MoveDirectory" commands.
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