Simple XPath Examples

Hi,
In this post i'll show some simple(but useful) XPath Examples
let's say that i have this xml file named 'Persons.xml':

<?xml version='1.0'?>

<Persons>

 <Person Height="180">

  <FullName>Yosi Havia</FullName>

  <Age>18</Age>

 </Person>

 <Person Height="177">

  <FullName>Yosi Cohen</FullName>

  <Age>22</Age>

 </Person>

 <Person Height="169">

  <FullName>Itay Cohen</FullName>

  <Age>32</Age>

 </Person>

</Persons>

so, let's talk code lines:

//@@@ Select all the persons in 18 age
XmlNodeList oXmlNodeList = 
XmlPersons.SelectNodes("/Persons/Person[Age = '" + 18 + "']");

//@@@ Select all the persons with age greater than 17
XmlNodeList oXmlNodeList = 
XmlPersons.SelectNodes("/Persons/Person[Age > '" + 17 + "']");

//@@@ Select all the persons that contains Yosi in their names
XmlNodeList oXmlNodeList = 
XmlPersons.SelectNodes("/Persons/Person/FullName[contains(.,'" + "Yosi" + "')]");

//@@@ Select all the persons with 180 height(attribute)
XmlNodeList oXmlNodeList = 
XmlPersons.SelectNodes("/Persons/Person[@Height = '" + "180" + "']");