CODEWITHSUNDEEP
xmlpowershell
MJA
MJA

Reputation: 358

XML Parent and Child Attributes and Elements in PowerShell

I have a some XML data that has a lot of attributes and multiple elements with the same name and I want to flatten it out into a CSV file. The data XML looks like this:

<?xml version="1.0" encoding="utf-8"?>
<SEGMENTS>
    <SEGMENT NAME="webcluster">
        <RESULTPAGE>
            <RESULTSET FIRSTHIT="1" LASTHIT="100" HITS="100" TOTALHITS="100">
                <HIT NO="1" RANK="19000" SITEID="0" MOREHITS="100">
                    <FIELD NAME="rank">19000</FIELD>
                    <FIELD NAME="id">1</FIELD>
                    <FIELD NAME="url">C:\website.com\folder1\file1.txt</FIELD>
                    <FIELD NAME="filename">file1.txt</FIELD>
                    <FIELD NAME="path">https://website.com/folder1/</FIELD>
                </HIT>
                <HIT NO="2" RANK="19000" SITEID="0" MOREHITS="100">
                    <FIELD NAME="rank">19000</FIELD>
                    <FIELD NAME="id">2</FIELD>
                    <FIELD NAME="url">C:\website.com\folder1\file2.txt</FIELD>
                    <FIELD NAME="filename">file2.txt</FIELD>
                    <FIELD NAME="path">https://website.com/folder1/</FIELD>
                </HIT>
                <HIT NO="3" RANK="18999" SITEID="0" MOREHITS="100">
                    <FIELD NAME="rank">18999</FIELD>
                    <FIELD NAME="id">3</FIELD>
                    <FIELD NAME="url">C:\website.com\folder5\file3.txt</FIELD>
                    <FIELD NAME="filename">file3.txt</FIELD>
                    <FIELD NAME="path">C:\website.com\folder\</FIELD>
                </HIT>
            </RESULTSET>
        </RESULTPAGE>
    </SEGMENT>
</SEGMENTS>

And I'm trying to iterate through it to produce something like this 

HIT    filename    path  
-----  ----------  ------  
1      file1.txt   C:\website.com\folder1\  
2      file2.txt   C:\website.com\folder1\  
3      file3.txt   C:\website.com\folder5\

My code is:

[xml]$xml=Get-Content .\xmlfile.xml  
$hits = $xml.segments.segment.resultpage.resultset.hit  
foreach($hit in $hits)  
{  
    foreach($field in $hit.field)  
    {  
        if (field."NAME" -eq 'url')  
        {  
            write-output $hit.no $field."#VALUE"  
        }  
    }  
}

And I keep getting errors. I can access the different elements and attributes by referencing them by ordinal location ($hits[0].field[4]) but I want to protect against future output where the FIELD values might be in a different order.

Can anyone suggest how I can get this done? I tried using select-XML and found that to be even more troublesome, but maybe that's the more elegant method.

Upvotes: 0

Views: 6215

Answers (3)

user1578107
user1578107

Reputation: 665

combining approaches. Select allows to get fields in a particular order.

[xml]$xml=Get-Content .\xmlfile.xml  
$hits = $xml.segments.segment.resultpage.resultset.hit  
foreach($hit in $hits)  
{  
    $r = @{hit = $hit.no; url = "N/A";filename="N/A"}
    $hit.field | % { $r[$_."NAME"] = $_."#text" }  
    New-Object PSObject -Property $r | Select hit,url,filename
}

Upvotes: 0

user1578107
user1578107

Reputation: 665

Something like this seems to do it, although i don't like that.

[xml]$xml=Get-Content .\xmlfile.xml  
$hits = $xml.segments.segment.resultpage.resultset.hit  
foreach($hit in $hits)  
{  
    $result = new-object PSObject -Property @{ hit = $hit.no; filename = ""; path = ""}

    foreach($field in $hit.field)  
    {  
        if ($field."NAME" -eq 'url')  
        {  
            $result.path = $field."#text"
        }  
        if ($field."NAME" -eq 'filename')
        {
            $result.filename = $field."#text"
        }
    }  
    write-output $result
}

or, just grabbing all fields, and then selecting relevant:

[xml]$xml=Get-Content .\xmlfile.xml  
$hits = $xml.segments.segment.resultpage.resultset.hit  
foreach($hit in $hits)  
{  
    $result = new-object PSObject -Property @{ hit = $hit.no }
    $hit.field | % { Add-Member -InputObject $result -MemberType NoteProperty -Name $_."NAME" -Value $_."#text"}  
    $result | select hit,url,filename | write-output
}

Upvotes: 1

Keith Hill
Keith Hill

Reputation: 201592

Try something like this:

Select-Xml -Xml $xml -XPath '//HIT' | Foreach {
    $num=$_.Node.NO
    $filenameAttr = $_.Node.Field | where {$_.Name -eq 'filename'}
    $pathAttr = $_.Node.Field | where {$_.Name -eq 'path'}
    new-object psobject -Property ([ordered]@{HIT=$num; filename = $filenameAttr.InnerText; path = $pathAttr.InnerText})
}

Upvotes: 0

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