How to get specific value from a xml string in c#

Question

I have following string

<SessionInfo>
  <SessionID>MSCB2B-UKT3517_f2823910df-5eff81-528aff-11e6f-0d2ed2408332</SessionID>
  <Profile>A</Profile>
  <Language>ENG</Language>
  <Version>1</Version>
</SessionInfo>

now I want to get the value of SessionID. I tried with below ..

var rootElement = XElement.Parse(output);//output means above string and this step has values

but in here,,

var one = rootElement.Elements("SessionInfo");

it didn't work.what can I do that.

and What if the xml string like below.can we use same to get the sessionID

<DtsAgencyLoginResponse xmlns="DTS" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="DTS file:///R:/xsd/DtsAgencyLoginMessage_01.xsd">
  <SessionInfo>
    <SessionID>MSCB2B-UKT351ff7_f282391ff0-5e81-524548a-11eff6-0d321121e16a</SessionID>
    <Profile>A</Profile>
    <Language>ENG</Language>
    <Version>1</Version>
  </SessionInfo>
  <AdvisoryInfo />
</DtsAgencyLoginResponse>

har07 · Accepted Answer · 2016-04-28 11:23:14Z

10

rootElement already references <SessionInfo> element. Try this way :

var rootElement = XElement.Parse(output);
var sessionId = rootElement.Element("SessionID").Value;

answered Apr 28, 2016 at 11:23

har07

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1 Comment

har07 Over a year ago

@bill I agree with HimBromBeere. Anyway, the keyword is default namespace. The 2nd XML has default namespace xmlns="DTS". Try to search for how to select element in namespace using LINQ-to-XML...

Roman · Accepted Answer · 2016-04-28 11:40:35Z

3

You can select node by xpath and then get value:

XmlDocument doc = new XmlDocument();
doc.LoadXml(@"<SessionInfo>
                 <SessionID>MSCB2B-UKT3517_f2823910df-5eff81-528aff-11e6f-0d2ed2408332</SessionID>
                 <Profile>A</Profile>
                 <Language>ENG</Language>
                  <Version>1</Version>
              </SessionInfo>");

string xpath = "SessionInfo/SessionID";    
XmlNode node = doc.SelectSingleNode(xpath);

var value = node.InnerText;

edited Apr 28, 2016 at 11:40

answered Apr 28, 2016 at 11:23

Roman

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1 Comment

Nick Mertin Over a year ago

The call to String.Format is completely unnecessary here

rootturk · Accepted Answer · 2016-04-28 11:29:23Z

1

Try this method :

   private string parseResponseByXML(string xml)
    {
        XmlDocument xmlDoc = new XmlDocument();
        xmlDoc.LoadXml(xml);
        XmlNodeList xnList = xmlDoc.SelectNodes("/SessionInfo");
        string node ="";
        if (xnList != null && xnList.Count > 0)
        {
            foreach (XmlNode xn in xnList)
            {
                node= xn["SessionID"].InnerText;

            }
        }
        return node;
    }

Your nodes :

xmlDoc.SelectNodes("/SessionInfo");

Different sample

 xmlDoc.SelectNodes("/SessionInfo/node/node");

I hope it helps.

answered Apr 28, 2016 at 11:29

rootturk

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Comments

user853710 · Accepted Answer · 2016-04-28 11:22:31Z

-1

Please do not do this manually. This is horrible. Use .NET built in stuff to make it simpler and more reliable

XML Serialisation

This is the right way to do it. You create Classes and let them be serialized automatically from an XML string.

answered Apr 28, 2016 at 11:22

user853710

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2 Comments

MakePeaceGreatAgain Over a year ago

The XElement IS ".NET-Stuff" and comes with LinqToXml. It´s absoutely okay to do it like this.

MakePeaceGreatAgain Over a year ago

I guess OP is only interested in a single value, thus he won´t need this overhead of creating the classes and adding the serializer-attributes. The approach of har07 works smart and is absouteley fine for this purpose.

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