遍历获取Xml子节点值

?xml version= 1.0 encoding= UTF-8 ? ufinterface billtype= gl filename= gledi isexchange= Y proc= add receiver= 01 replace= Y roottag= sendresult sender= ceec succ

 ?xml version="1.0" encoding=UTF-8? 

 ufinterface billtype="gl" filename="gledi" isexchange="Y" proc="add" receiver="01" replace="Y" roottag="sendresult" sender="ceec" successful="Y" 

 sendresult 

 billpk 

 /billpk 

 bdocid AAAA /bdocid 

 filename BBBB /filename 

 resultcode CCCC /resultcode 

 resultdescription DDDD /resultdescription 

 content EEEE /content 

 /sendresult 

 sendresult 

 billpk 

 /billpk 

 bdocid aaaa /bdocid 

 filename bbbb /filename 

 resultcode cccc /resultcode 

 resultdescription dddd /resultdescription 

 content eeee /content 

 /sendresult 

 /ufinterface 

只获取 sendresult 节点下的信息
MessageBox.Show会弹出billpk、bdocid、filename、resultcode、resultdescription、content等节点的信息