title: how to convert Xmlstring to Xmlfile or QDomDocument
body: <p>If I have a string which contains proper xml format and I want to convert it to an XML file so I can use Xpath to parse it properly.</p>
  
  <p>How do I do this? please give me some valid example  and i also want to load those each xml node value into Qtablewidgetitem how can i do..please help mee</p>