I have an xml document formated like this:
<root>
<obj>
<indexlist>
<index name="NUMD" value="val1" />
<index name="DATE" value="val2" />
</indexlist>
</obj>
</root>
now I'd like to change the value attribute of the index element where name is set to "DATE". I get the attribute like this:
$attr = $xml.selectnodes("//obj/indexlist/index[@name='DATE']/@value")
I can view the value by typing this:
$attr.'#text'
but I can't change it:
$attr.'#text' = 'foo'
The property '#text' cannot be found on this object. Verify that the property exists and can be set.
At line:1 char:1
+ $n.'#text' = 'foo'
+ ~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (:) [], RuntimeException
+ FullyQualifiedErrorId : PropertyAssignmentException
how do I change the value of an XMLAttribute?
I'd also like to stick with XPath returning the attribute directly if that's possible because the end-user of that script will define the elements and attributes to change in a config file using XPath.
While using XPath for the attributes as well the user can simply provide the attribute to change and the future-value with just two arguments: the XPath and the value.
Besides #text
, you can also access XmlAttribute
's value via Value
property :
$attr = $xml.SelectSingleNode("//obj/indexlist/index[@name='DATE']/@value")
#print old value
$attr.Value
#update attribute value
$attr.Value = "new value"
#print new value
$attr.Value
Note that Value
in $attr.Value
is property name of XmlAttribute
. It doesn't affected by the fact that the attribute in your XML named value
.