The File uploader within the Link Manager
you are referring to, is actually a UrlWebEditor
control, which can be accessed in ~/Sitefinity/Admin/ControlTemplates/Pages/Dialogs/PagesSelector.ascx
| Start urlWebEditor
| <cc:UrlWebEditor id="urlWebEditor" runat="server"/>
| End urlWebEditor
You can override this control to behave in a manner which is relevant to your requirements. After that, in the template, you should substitute UrlWebEditor
control with the one you have implemented.
Hope, this will get you going.
All the best,
the Telerik team
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