(修正)使用XPATH解析xml的问题
xml如下：
<?xml version = '1.0 '?>
<Reservation xmlns= "reservation.fidelio.1.0 " mfShareAction= "NA " mfReservationAction= "ADD ">
<HotelReference>
<hotelCode> FOXH </hotelCode>
</HotelReference>
<ResProfiles>
<ResProfile>
<Profile xmlns= "profile.fidelio.1.2 " profileType= "D " gender= "UNKNOWN ">
<profileID> 49717 </profileID>
</Profile>
</ResProfile>
</ResProfiles>
</Reservation>

C#代码如下：
XmlDocument doc = new XmlDocument();
doc.Load(filename);

XmlNamespaceManager nsmgr = new XmlNamespaceManager(doc.NameTable);
nsmgr.AddNamespace( "res ", "reservation.fidelio.1.0 ");
nsmgr.AddNamespace( "pro ", "profile.fidelio.1.2 ");


string d = doc.SelectSingleNode( "/res:Reservation/res:HotelReference/res:hotelCode ").InnerText;

string a = doc.SelectSingleNode( "/res:Reservation/res:ResProfiles/res:ResProfile/pro:Profile/pro:ProfileID ", nsmgr).InnerText;

为何d可以读出FOXH，但是a却出错，请高手指教


[解决办法]
不是ProfileID
是profileID