使用 powershell 在 XML 中使用循环来追加子节点

Question

I have some xml that looks like this...

<process>

<stage><stage />
<stage><stage />
<stage><stage />

<process />

I am trying to add a childnode to each of those nodes and add a new node called to get something like this....

<process>

<stage>
<display><display /> 
<stage />
<stage>
<display><display /> 
<stage />
<stage>
<display><display /> 
<stage />

<process />

I wrote this in Powershell

[XML]$Document = Get-Content "File Path"

$varChild = $Document.CreateElement("display" , $Document.NamspaceURI)
$counter = 0

do {

$Document.process.stage[$counter].AppendChild($var)
$counter += 1

} while ($counter -lt $Document.process.stage.count)

My troubleshooting has revealed that what is happening is that the node gets appended to the First stage node BUT THEN it gets removed and added to the second stage node......I have no idea why or how to add it to all of the stage nodes.

Answer 1

You can do the following with your example XML:

[XML]$Document = Get-Content "File Path"
$Document.process.SelectNodes("//stage") | ForEach-Object {
    $node = $Document.CreateNode("element","display",$Document.NamspaceURI)
    $_.AppendChild($node)
}

Explanation:

You convert your XML content into an XMLDocument . Use the SelectNodes() method with an XPath to select your stage nodes. Create a new node for each iteration and append it to the current stage node ( $_ ).