title: Retrieve external URL of media file
body: <p>I have a page data folder with a property "Image", which is a reference to a Media file in the Composite C1 backend.</p>
  
  <p>I now want to retrieve the data in my asp.net user control, but all I get when I access the "Image" Property of my PageDataFolder Type, is a string with the following format:</p>
  
  <blockquote>
    <p>mediaarchive:b5354eba-3f69-4885-9eba-74576dff372d</p>
  </blockquote>
  
  <p>I am not sure how to get the external image url from that. Is there an API function I can use?</p>