XPathDocument doc = new XPathDocument(Server.MapPath("tem\\XMLFile1.xml" ));  
   //创建一个新的转换
   XslTransform transForm = new XslTransform();
   transForm.Load(Server.MapPath("tem\\XSLTFile1.xsl" ));
   //输出
   FileStream fs = new FileStream(Server.MapPath(Random_str()),FileMode.Create);
   XPathNavigator nav = doc.CreateNavigator();
   transForm.Transform(nav,null,fs);
   fs.Close();