XDocument with linq

Now rather than using leveraging the XmlDocument functions for querying our xml document we can use linq with the XDocument to query our data.

<?xml version="1.0" encoding="utf-8" ?>

<people>

  <person firstname="john" lastname="doe">

    <contactdetails>

      <emailaddress>john@unknown.com</emailaddress>

      <phonenumber>9179799105</phonenumber>

    </contactdetails>

  </person>

  <person firstname="jane" lastname="doe">

    <contactdetails>

      <emailaddress>jane@unknown.com</emailaddress>

    </contactdetails>

  </person>

  <person firstname="tomek" lastname="chooch">

    <contactdetails>

      <emailaddress>tchooch@unknown.com</emailaddress>

    </contactdetails>

  </person>

  <person firstname="pawel" lastname="chooch">

    <contactdetails>

      <emailaddress>pchooch@unknown.com</emailaddress>

    </contactdetails>

  </person>

  <person firstname="magda" lastname="tyvoniuk">

    <contactdetails>

      <emailaddress>mt@unknown.com</emailaddress>

    </contactdetails>

  </person>

  <person firstname="adam" lastname="chooch">

    <contactdetails>

      <emailaddress>mt@unknown.com</emailaddress>

    </contactdetails>

  </person>

  <person firstname="jake" lastname="tyvoniuk">

    <contactdetails>

      <emailaddress>jt@unknown.com</emailaddress>

    </contactdetails>

  </person>

</people>

now let's load it into our XDocument and use linq to find what we want.

using System;

using System.Linq;

using System.Xml.Linq;

namespace pc.xmlDocumentExample

{

    class Program

    {

        static void Main(string[] args)

        {

            var xDoc = XDocument.Load(@"..\..\data.xml");

            var choochs = xDoc.Descendants("person")

                .Where(p => p.LastAttribute.Value == "chooch")

                .OrderBy(p => p.FirstAttribute.Value);

            foreach (var c in choochs)

                Console.WriteLine(c);

        }

    }

}

again it comes at a performance price, but when dealing with smaller xml files may very well be trivial.