Chapters/working-with-xml/DiskReportingXML.ps1
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#requires -version 5.0 Function Get-DiskUsage { [cmdletbinding()] Param( [Parameter(Position = 0, ValueFromPipeline)] [string[]]$Computername = $env:Computername) Begin { #define a hashtable of parameter values for Get-CimInstance $pm = @{ Classname = 'Win32_logicaldisk' Filter = "drivetype=3" ComputerName = $Null ErrorAction = 'stop' } } #begin Process { foreach ($computer in $Computername) { Try { #set the next computername $pm.Computername = $Computer $d = Get-CimInstance @pm $d | Select-Object @{Name = "Date";Expression = {(Get-Date).ToShortDateString()}}, PSComputername, DeviceID, Size, Freespace, @{Name = "PercentFree";Expression = {($_.freespace/$_.size)*100 -as [int]}} } Catch { Write-Warning "[$computer] $($_.exception.message)" } } #foreach computer } #process End { #not used } #end } Function New-DiskXML { [cmdletbinding(SupportsShouldProcess)] Param( [Parameter( Position = 0, Mandatory, HelpMessage = "Enter the filename and path for the new disk XML file" )] [string]$Path ) [xml]$doc = New-Object System.Xml.XmlDocument #create declaration $dec = $doc.CreateXmlDeclaration("1.0", "UTF-8", $null) #append to document $doc.AppendChild($dec) | Out-Null #create the outer node $node = $doc.CreateNode("element", "snapshots", $null) $doc.AppendChild($node) | Out-Null if ($PSCmdlet.ShouldProcess($path)) { $doc.Save($path) } } Function Update-DiskXML { [cmdletbinding(SupportsShouldProcess)] Param( [Parameter( Position = 0, Mandatory, HelpMessage = "Enter the filename and path for the disk XML file" )] [string]$Path, [Parameter(ValueFromPipeline)] [string[]]$Computername = $env:COMPUTERNAME ) Begin { if (-Not (Test-Path -Path $path)) { #create the file if it doesn't exist New-DiskXML -Path $path } #resolve and convert the path to a filesystem $cpath = Convert-Path -Path $path #open the XML document [xml]$doc = Get-Content -Path $cpath #select the Snapshots node $snapshots = $doc.ChildNodes[1] #or $doc.SelectSingleNode("snapshots") #property names $props = "Date", "PSComputername", "DeviceID", "Size", "Freespace", "PercentFree" } #begin Process { $data = Get-DiskUsage $Computername foreach ($item in $data) { $snap = $doc.CreateNode("element", "snapshot", $null) #create an entry for each $props | ForEach-Object { $e = $doc.CreateElement($_) $e.InnerText = $item.$_ $snap.AppendChild($e) | Out-Null } $snapshots.AppendChild($snap) | Out-Null } } #process End { if ($PSCmdlet.ShouldProcess($cpath)) { $doc.save($cpath) } } #end } |