Powershell to get text nodes from xml

Question

I am working on a simple powershell script that verify if inside of the xml file the attribute(s) exists. The xml file looks like,

<?xml version="1.0"?>
 <Objects>
  <Object>
   <Property Name="Browser">Firefox</Property>
   <Property Name="PDF">Adobe Reader</Property>
 </Object>
</Objects>

I want the powershell to verify if the attribute Firefox exists, and then to execute a task afterward.

[xml]$file = get-content C:\Admin\personalsettings.xml
$xmlProperties = $file.SelectNodes("/Objects/Object/Property")
Foreach ($xmlProperty in $xmlProperties) {
$strName = ($xmlProperty | Where-Object {$_.Name -eq "Firefox"    }).InnerXml
 If ($strName -eq "False")
 {
 Invoke-Item "C:\windows\protected\browser.exe"
 }
}

Answer 1

Note that Firefox is a child text node (the text content) of a Property element in your XML, accessible via the latter's .InnerText property.

Therefore, you can retrieve the / test the existence of a Property element of interest as follows, using the Where() array method:

$firefoxElem = $xmlProperties.Where({ $_.InnerText -eq 'FireFox' }, 'First')
$haveFirefoxElem = [bool] $firefoxElem

---

A simpler approach, if you only need to know the presence of the element of interest, is to use PowerShell's XML dot notation, which obviates the need for XPath expressions via .SelectNodes():

$haveFirefoxElem = $file.Objects.Object.Property.InnerText -contains 'FireFox'

Answer 2

Using xpath (case sensitive):

if (select-xml "/Objects/Object/Property[text()='Firefox']" file.xml) { 'yes' } 
if (select-xml "//Property[text()='Firefox']" file.xml) { 'yes' } 
if (select-xml "//*[Property='Firefox']" file.xml) { 'yes' }
if (select-xml "*[Object[Property[@Name='Browser']='Firefox']]" file.xml) { 'yes' }