How to create and read an XML file in PowerShell?
Create XML: Use System.
To create and read an XML file in PowerShell, you can use built-in .NET classes like [xml] and methods from System.Xml.XmlDocument or System.IO.File . The process is straightforward and doesn't require external modules.
Create an XML File in PowerShell
To create an XML file, start by instantiating an XmlDocument object, build the structure with elements and attributes, then save it to disk.
Here's how:
- Create a new XmlDocument object
- Add a declaration and root element
- Append child elements and set values
- Save the document to a file
# Create a new XML document
$xmlDoc = New-Object System.Xml.XmlDocument
$declaration = $xmlDoc.CreateXmlDeclaration("1.0", "UTF-8", $null)
$xmlDoc.AppendChild($declaration) | Out-Null
<h1>Create root element</h1><p> $root = $xmlDoc.CreateElement("Configuration")
$xmlDoc.AppendChild($root) | Out-Null</p><h1> Add child elements</h1><p> $server = $xmlDoc.CreateElement("Server")
$server.InnerText = "localhost"
$root.AppendChild($server) | Out-Null</p><p> $port = $xmlDoc.CreateElement("Port")
$port.InnerText = "8080"
$root.AppendChild($port) | Out-Null</p><h1> Save to file</h1><p> $xmlDoc.Save("C:\Temp\config.xml")</p>
Read an XML File in PowerShell
Reading an XML file is even simpler. Use the [xml] type accelerator to load the file directly into a variable you can navigate like an object.
Example:
# Load XML from file [xml]$xmlData = Get-Content -Path "C:\Temp\config.xml" <h1>Access values</h1> <p>$serverName = $xmlData.Configuration.Server $portNumber = $xmlData.Configuration.Port</p> <p>Write-Host "Server: $serverName" Write-Host "Port: $portNumber"</p>
You can also use $xmlDoc.Load("path") if working with XmlDocument objects instead of casting.
Handle Errors and Validate Paths
Always check if the file exists before reading and ensure the directory exists when writing.
- Use Test-Path to verify file or folder existence
- Wrap XML operations in try/catch to handle malformed XML
try {
if (Test-Path "C:\Temp\config.xml") {
[xml]$data = Get-Content "C:\Temp\config.xml"
} else {
Write-Warning "File not found."
}
} catch {
Write-Error "Failed to read XML: $_"
}
Basically, creating and reading XML in PowerShell combines simple object manipulation with .NET's robust XML support. Structure your data carefully and always validate input and paths.
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