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PowerShell Create XML document with XmlWriter .net object

XML stands for eXtensible Markup Language it was designed to store and transport data and to be both human- and machine-readable. I wanted to create a simple readable XML files using PowerShell for few of the projects. There are native cmdlets (Export-CliXML and ConvertTo-XML) available in the Powershell to create XML file, but the data format in the xml file was generating the format I was looking for. I wanted plain XML file. To make the required format I used .net object [System.XML.XmlWriter].

Microsoft Powershell XML File .net object XML object xmlwriter new-object writestartelement writeelementstring.png

While writing the script, I have added few extra information to this XML for testing purpose. Those lines are safe to remove, if you don't want.

Download script here Generate-XMLWithNetObject.ps1 here or  this script is also available on github.com.

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#Referenace Document
#https://docs.microsoft.com/en-us/dotnet/api/system.xml.xmlwriter.writeprocessinginstruction?view=net-5.0
#https://www.w3schools.com/xml/dom_intro.asp
$filePath = 'C:\Temp\logs\info.log'
#Step by step Article to create a XML Document using 

#Use XmlWriterSettings .net Object and Configure The XML format settings
$xmlsettings = New-Object System.Xml.XmlWriterSettings
$xmlsettings.Indent = $true
$indentChars = $(' ' * 4)
$xmlsettings.IndentChars = $indentChars 

#Create a empty XML file under given path with XML Settings
$xmlWriterObj = [System.XML.XmlWriter]::Create($filePath, $xmlsettings)

# Write the XML Declaration and set the XSL
$xmlWriterObj.WriteStartDocument()

#Define Additional XML format (Write the Processing Instruction node.)
$xmlWriterObj.WriteProcessingInstruction('xml-stylesheet', "type='text/xsl' href='style.xsl'") #can be removed this line

#Define the DocumentType node
$xmlWriterObj.WriteDocType('rootinfo', $null , $null, '<!ENTITY rootinfo>')  #can be removed this line

#Define a Comment node
$xmlWriterObj.WriteComment("sample XML") #can be removed this line

#Define Start the Root Element
$xmlWriterObj.WriteStartElement("Root") # <-- Start <Root> Element
    
    $xmlWriterObj.WriteStartElement('Object') # <-- Start <ChildObject>  Element

            $xmlWriterObj.WriteElementString('PropertyKey01','Value01')   # <-- Add Property key Value pair 1 Element
            $xmlWriterObj.WriteElementString('PropertyKey02','Value02')   # <-- Add Property key Value pair 2 Element
            $xmlWriterObj.WriteElementString('PropertyKey03','Value03')   # <-- Add Property key Value pair 2 Element

                $xmlWriterObj.WriteStartElement("SubChildObject") # <-- Start <SubChildObject> 
                
                    $xmlWriterObj.WriteEntityRef("h") #<-- add style and data #can be removed this line
                    $xmlWriterObj.WriteElementString("SubPropertyKey01","Value01")
                    $xmlWriterObj.WriteElementString("SubPropertyKey02","Value02")

                $xmlWriterObj.WriteEndElement() # <-- Add End <SubObject>

    $xmlWriterObj.WriteEndElement() # <-- Add End <Object>

    #Define CDATA
    $xmlWriterObj.WriteCData("This is some CDATA") #can be removed this line
    
$xmlWriterObj.WriteEndElement() # <-- Add End <Root> 

#This is End, Finalize and close the XML Document
$xmlWriterObj.WriteEndDocument()
$xmlWriterObj.Flush()
$xmlWriterObj.Close()

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