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Converting XML with namespaces to CSV using powershell

由 时光怂恿深爱的人放手 提交于 2019-12-06 09:21:26

A combination of Select-Object and Select-Xml seems to work pretty well:

$ns = @{
    item="urn:loc.gov:item"
    ns2="urn:loc.gov:box"
    ns3="http://www.example.com/inverter"
    ns4="urn:loc.gov:xyz"
}

$doc = New-Object xml
$doc.Load("test.xml")

$doc.BOX.ChildNodes | Select-Object -Property `
    Description,`
    PackSizeNumeric, `
    @{Name="BuyersItemIdentification_ID"; Expression={$_.BuyersItemIdentification.ID}}, `
    @{Name="CommodityClassification_CommodityCode"; Expression={$_.CommodityClassification.CommodityCode}}, `
    @{Name="Weight"; Expression={Select-Xml -Namespace $ns -Xml $_ -XPath "./ns2:AdditionalItemProperty[item:Name = 'Weight']/item:Value"}}, `
    @{Name="Tare"; Expression={Select-Xml -Namespace $ns -Xml $_ -XPath "./ns2:AdditionalItemProperty[item:Name = 'Tare']/item:Value"}}, `
    @{Name="ManufacturerParty_ID"; Expression={$_.ManufacturerParty.PartyIdentification.ID}} `
| Export-Csv "Stsadm-EnumSites.csv" -NoTypeInformation -Delimiter:";" -Encoding:UTF8

result (Stsadm-EnumSites.csv)

"Description";"PackSizeNumeric";"BuyersItemIdentification_ID";"CommodityClassification_CommodityCode";"Weight";"Tare";"ManufacturerParty_ID"
"ITEM1";"6";"75847589";"856952";"0";"0";"847532"
"ITEM2";"10";"9568475";"348454";"0";"0";"7542125"
Vincent De Smet

Tomalak's answer is succinct and seems best solution for the problem at hand.

I was trying to make something generic, but the result is not even in the format requested (the additional properties list is hard to convert in a generic way, fieldnames are clunky). Anyway, the below solution walks down the XML tree flattening the data. It is not bound by the element names (except for the initial select)

After finishing my generic answer, I'm now wondering if it wouldn't be better to write & apply an XSLT transformation.

#[xml]$xml = Get-Content test.xml
#xml to process
$xml = [xml]@"
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ns3:BOX xmlns="urn:loc.gov:item" 
         xmlns:ns2="urn:loc.gov:box" 
         xmlns:ns3="http://www.example.com/inverter" 
         xmlns:ns4="urn:loc.gov:xyz">
    <ns3:Item>
        <Description>ITEM1</Description>
        <PackSizeNumeric>6</PackSizeNumeric>
        <ns2:BuyersItemIdentification>
            <ID>75847589</ID>
        </ns2:BuyersItemIdentification>
        <ns2:CommodityClassification>
            <CommodityCode>856952</CommodityCode>
        </ns2:CommodityClassification>
        <ns2:AdditionalItemProperty>
            <Name>Weight</Name>
            <Value>0</Value>
        </ns2:AdditionalItemProperty>
        <ns2:AdditionalItemProperty>
            <Name>Tare</Name>
            <Value>0</Value>
        </ns2:AdditionalItemProperty>
        <ns2:ManufacturerParty>
            <ns2:PartyIdentification>
                <ID>847532</ID>
            </ns2:PartyIdentification>
        </ns2:ManufacturerParty>
    </ns3:Item>
    <ns3:Item>
        <Description>ITEM2</Description>
        <PackSizeNumeric>10</PackSizeNumeric>
        <ns2:BuyersItemIdentification>
            <ID>9568475</ID>
        </ns2:BuyersItemIdentification>
        <ns2:CommodityClassification>
            <CommodityCode>348454</CommodityCode>
        </ns2:CommodityClassification>
        <ns2:AdditionalItemProperty>
            <Name>Weight</Name>
            <Value>0</Value>
        </ns2:AdditionalItemProperty>
        <ns2:AdditionalItemProperty>
            <Name>Tare</Name>
            <Value>0</Value>
        </ns2:AdditionalItemProperty>
        <ns2:ManufacturerParty>
            <ns2:PartyIdentification>
                <ID>7542125</ID>
            </ns2:PartyIdentification>
        </ns2:ManufacturerParty>
    </ns3:Item>
</ns3:BOX>
"@

$nsm = [Xml.XmlNamespaceManager]$xml.NameTable

$nsm.AddNamespace("ns1","urn:loc.gov:item")
$nsm.AddNamespace("ns2","urn:loc.gov:box")
$nsm.AddNamespace("ns3","http://www.example.com/inverter")
$nsm.AddNamespace("ns4","urn:loc.gov:xyz")

#function to recursively flatten xml subtree into a hashtable (passed in)
function flatten-xml {
  param (
    $Parent,
    $Element,
    $Fieldname,
    $HashTable
  )

  if ($parent -eq "") {
    $label = $fieldname
  } else {
    $label = $parent + "_" + $fieldname 
  }

  #write-host "$label is $($element.GetType())"

  if ($element.GetType() -eq [System.Xml.XmlElement]) { 
    #get property fields

    $element | Get-Member | ? { $_.MemberType -eq "Property" } | % {
      #write-host "moving from $label to $($_.Name)"
      flatten-xml -Parent $label -Element $element.($_.Name) -FieldName $_.Name -HashTable $HashTable
    }
  }elseif($element.GetType() -eq [System.Object[]]) { 
    #write-host "$label is an array"
    $i = 0
    $element | % { flatten-xml -Parent $label -Element $_ -FieldName "item$i" -HashTable $HashTable; $i++ }
  }else {
    $HashTable[$label] = $element
  }
 }

#convert the nodecollection returned by xpath query into hashtables and write them out to CSV
$xml.SelectNodes("//ns3:BOX/ns3:Item",$nsm) | % { 
    $element = $_
    $ht = @{}
    $element | Get-Member | ? { $_.MemberType -eq "Property" } | % {
      flatten-xml -Parent "" -Element $element.($_.Name) -FieldName $_.Name -HashTable $ht 
    }

    [PSCustomObject]$ht
}  | Export-Csv "test2.csv" -NoTypeInformation -Delimiter:";" -Encoding:UTF8

Result:

> gc .\test2.csv

"AdditionalItemProperty_item0_Name";"AdditionalItemProperty_item0_Value";"AdditionalItemProperty_item1_Name";"AdditionalItemProperty_item1_Value";"BuyersItemIdentification_ID";"CommodityClassification_CommodityCode";"Description";"ManufacturerParty_PartyIdentification_ID";"PackSizeNumeric"
"Weight"                            ;"0"                                  ;"Tare"                              ;"0"                                  ;"75847589"                   ;"856952"                               ;"ITEM1"      ;"847532"                                  ;"6"
"Weight"                            ;"0"                                  ;"Tare"                              ;"0"                                  ;"9568475"                    ;"348454"                               ;"ITEM2"      ;"7542125"                                 ;"10"

References:

标签
xml
powershell
csv
data-conversion
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