用linq（C＃）读取xml

Question

how do I read the following xml document?

My code is :

var vb =
    (from vbs in XMLDoc.Descendants("Response").Descendants("Records ")
    select new
        {
           ref = vbs.Element("ref").Value
        }).ToList();

XML Document:

<Response>
  <Msg>
       <Code>30</Code>
    <Query/>
  </Msg>
<Rec>
    <Records price="1989" no="838976" ref="1927A64FF6B03527E5BFD8424F647848005143DB" query="00"/>
</Rec>
</Response>

Answer 1

"Records " should be "Records" , and your call to Element() in the anonymous class member initializer should be Attribute() since you are reading an attribute, which is not an element.

var vb =
    (from vbs in XMLDoc.Descendants("Response").Descendants("Records")
    select new
        {
           ref = (string)vbs.Attribute("ref")
        }).ToList();

The conversion to string is preferred when reading attributes, IMO, because it will return null when the attribute cannot be found. If you use vbs.Attribute("ref").Value instead, then you will cause a NullReferenceException if the attribute does not exist.