Question

The data:

<sys>
  <id>SCPUCLK</id>
  <label>CPU Clock</label>
  <value>2930</value>
</sys>
<sys>
  <id>CPUTEMP</id>
  <label>CPU Temp</label>
  <value>39</value>
</sys>

This is the code that I’m using to read the data:

XmlDocument document = new XmlDocument();
document.LoadXml(data);
XmlElement node = document.SelectSingleNode("/sys/value") as XmlElement;
Console.WriteLine("node = " + node);

The issue: Console.WriteLine("node = " + node); doesn’t give me any output besides node: but no actual value like 2930 from the sample above.

Thanks

Answer 1

As an alternative to using XmlDocument, you can also use LINQ to XML (which is my preference):

using System.Xml.Linq;

XDocument xDoc = new XDocument();
// Parse loads the XDocument with XML from a string
xDoc = XDocument.Parse(data);

string node = (from x in xDoc.Root.Elements("value")
               select x.Value).SingleOrDefault();

Console.WriteLine("node = " + node);

Nothing wrong with using XmlDocument, especially for what you’re doing, but you might want to check out LINQ to XML when you get a chance, as I find it a lot easier to work with than XmlDocument.

If you want to get all the “value” elements, simply remove the SingleOrDefault() from the query, and then you can loop through the result, like this:

var nodes = from x in xDoc.Root.Elements("value")
           select x.Value;

foreach (var node in nodes)
{
    Console.WriteLine("node = " + node);
}

Here’s a site worth checking out:
LINQ to XML – 5 Minute Overview