The EnableFileOpen property of RadFileExplorer is controlling if the preview window (or the download dialog) should appear when a file is opened.
The Method 1 of the Jayesh's post is the way to disable the doubleclick in the Grid component of RadFileExplorer.
I just wanted to point out that in the posted handler a private property is used, which is not recommended. You should use its setter instead set_cancel()
. Also, this will disable the doubleclick on a folder and will prevent navigation. You can check if the clicked item is file or folder using the isDirectory() method, e.g.:
function OnClientFileOpen(explorer, args)
if (!args.get_item().isDirectory())//check if the clicked item is a folder
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