Xpath multiple conditions C#

if XML string image data from webservice is blank ,then show your image from local folder, code sample :
  
  <img src="<%#XPath("image").ToString().Trim().Length !=0 ? XPath("image") : "images/small_no_images.jpg"%>" alt="<%#XPath("title")%>-Sports Cheap Deals"  border="0"/></a>