Mastering Windows PowerShell Scripting - Second Edition

Modifying element and attribute values

Modifying an existing node, whether it is an attribute or an element value, can be done by assigning a new value:

[XDocument]$xDocument = @" 
<?xml version="1.0"?> 
<items>   
<item name='Fridge'> 
<category>Appliancse</category> 
</item> 
<item name='Cooker'> 
<category>Appliances</category> 
</item> 
</items> 
"@ 
$xDocument.Element('items'). 
Elements('item'). 
Where( { $_.Attribute('name').Value -eq 'Fridge' } ). 
ForEach( { $_.Element('category').Value = 'Appliances' } ) 

Modifying the value of an attribute uses the same syntax:

[XDocument]$xDocument = @" 
<?xml version="1.0"?> 
<list name='letters'> 
<name>1</name> 
</list> 
"@ 
$xDocument.Element('list').Attribute('name').Value = 'numbers' 

If the attribute does not ...