Set-XmlContent.ps1
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function Set-XmlContent { [CmdletBinding()] param ( # Path to the XML file. [Parameter(Mandatory)] [string]$path, # XPath to the element (e.g. /configuration/appSettings). [Parameter(Mandatory)] [string]$element, # Whatever XML you want to replace the existing element contents with. [Parameter(Mandatory)] [string]$innerXml ) if (!(Test-Path -PathType Leaf $path)) { Write-Error "File not found: $path" return } $path = Resolve-Path $path $document = [xml](Get-Content $path) if ($document -eq $null) { Write-Error "File not a valid XML document: $path" } $newElement = $document.CreateDocumentFragment() $newElement.InnerXml = $innerXml Write-Verbose "Performing XPath query: $element" $parent = $document.SelectSingleNode($element) while ($parent.FirstChild) { $parent.RemoveChild($parent.FirstChild) | Out-Null } $parent.AppendChild($newElement) | Out-Null # Be sure to format the XML on save, otherwise it will be nasty and everyone will hate touching/viewing it. $xmlSettings = New-Object System.Xml.XmlWriterSettings $xmlSettings.Indent = $true $xmlSettings.IndentChars = "`t" $xmlSettings.Encoding = [Text.Encoding]::UTF8 $xmlWriter = [Xml.XmlWriter]::Create($path, $xmlSettings) $document.Save($xmlWriter) $xmlWriter.Dispose() } |