title: How to delete in asp:ListView that uses asp:XmlDataSource?
body: <p>I've created an <code>asp:ListView</code> and attached it to an <code>asp:XmlDataSource</code>. I would like to support the delete command for my list, so I've added the following button:</p>
  
  <pre><code>&lt;asp:Button runat="server" CommandName="Delete" 
              Text="Del" CausesValidation="false" /&gt;
  </code></pre>
  
  <p>It throws an 'Specified method is not supported'. Any ideas on how to implement this delete? </p>