CODEWITHSUNDEEP
c#xmlxpath
Lav
Lav

Reputation: 99

simple xpath not working to find a node

Iam trying to get a particular node with value equals my input parameter,my xpath is like this where b is the node I need

string xpath = "/Batches/Measurement/Batch[market=someval]/b";

<?xml version="1.0" encoding="utf-8" ?>
<Batches>
  <Measurement>
    <Batch>
      <market>someval</market>
      <b>someval</b>
    </Batch>
  </Measurement>
</Batches>

var xmlNode = xmlDoc.SelectNodes(xpath);

no nodes retruned always count 0 ,I checked that the xmldoc is loaded properly.

Upvotes: 1

Views: 960

Answers (2)

Lotok
Lotok

Reputation: 4607

Have you thought about using LINQ to XML?

It is slightly more efficient and shorter clearner syntax for selecting. I know you asked about Xpath so feel free to ignore this. Just making you aware of the option

var doc = XDocument.Load("c:\\tmp\\test.xml");
var result = doc.Descendants().Where(x => x.Element("b") != null)
   .Select(x => x.Element("b").Value);

Upvotes: 0

hr_117
hr_117

Reputation: 9627

Your xpath is nearly perfect. Only keep in mind const values have to be put in apostrophe:

"/Batches/Measurement/Batch[market='someval']/b"

Update: C# code example:

 XmlNodeList nodeList;
 nodeList = root.SelectNodes("/Batches/Measurement/Batch[market='someval']/b");
  foreach (XmlNode node in nodeList)
  {
      for (int i = 0; i < node.ChildNodes.Count; i++)
      {
          Console.WriteLine(node.ChildNodes[i].InnerText);
      }       
  }

The return value of SelectNodes is a nodeList. You have to iterate through it.

And a little bit shorter:

      XmlElement root = doc.DocumentElement;
      string text;
      text = root.SelectSingleNode("/Batches/Measurement/Batch[market='someval']/b").InnerText;
      Console.WriteLine(text);

Upvotes: 4

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