title: Need to display icon in asp:BoundField
body: <p>Currently, my field is bound to a boolean and will display text: "true" or "false".</p>
  
  <p>I would like this field to either display an icon if field is true, otherwise display nothing.  </p>
  
  <p>How can I do this?</p>
  
  <pre><code> &lt;asp:BoundField DataField="IsLocked" HeaderText="Locked" HeaderStyle-HorizontalAlign="Left" ItemStyle-HorizontalAlign="Left" 
                          SortExpression="IsLocked" ItemStyle-Width="4%" ItemStyle-Wrap="false" HeaderStyle-Wrap="false"&gt; &lt;/asp:BoundField&gt;   
  </code></pre>