Straight to the questions:
- RadFileExplorer does not offer the possibility to change the LoadingPanel's image out-of-the-box. However you can use the following CSS to override the default image:
Please note that this will affect any additional RadAjaxLoading panel on the page.
- To achieve this functionality, you need to assign handlers to the RadFileExplorer delete button and context menus, cancel the events and manually call alert / confirm dialogs. For your convenience I have attached a sample page demonstrating this approach.
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