setup.netfx3.ps1 - choose and ISO file to use as the source for enabling NetFx3 in DISM

setup.netfx3.ps1

#Requires -Version 4.0
#Requires -RunAsAdministrator

Trap { Write-Host $_ -Fore Red ; pause ; exit 1 }
$ErrorActionPreference = "Stop"

function Mount-Iso([string] $isoPath)
{
	if ( -not (Test-Path $isoPath)) { throw "$isoPath does not exist" }
	
	Write-Host "Mounting $isoPath using powershell"
	Mount-DiskImage -ImagePath $isoPath
	$driveLetter = (Get-DiskImage $isoPath | Get-Volume).DriveLetter
  start-sleep -s 3
	return ($driveLetter + ":\")
}

function Dismount-Iso([string] $isoPath)
{
	start-sleep -s 5
	Write-Host "Unmounting $isoPath using powershell"
	Dismount-DiskImage -DevicePath (Get-DiskImage -ImagePath $isoPath).DevicePath
}

function FindISO-Dialog
{
	$titleText="Please select the ISO File used to install your edition of windows"
	Write-Host $titleText -fore Yellow
	Add-Type -AssemblyName System.Windows.Forms
	$FileBrowser = New-Object System.Windows.Forms.OpenFileDialog -Property @{
		Title = $titleText
		Filter = 'ISO Files (*.iso)|*.iso'
		Multiselect = $false
	}
	[void]$FileBrowser.ShowDialog()
	return $FileBrowser.FileName
}

if ([Environment]::OSVersion.Version -ge (new-object 'Version' 6,2))
{
	$isoFile = FindISO-Dialog
	$mountPath = Mount-Iso $isoFile
	$sourcesPath = Join-Path $mountPath "\sources\sxs"

	if ( -not (Test-Path $sourcesPath)) { Write-Error "$sourcesPath does not exist" }
	else { & Dism /online /enable-feature /featurename:NetFx3 /All /Source:$sourcesPath /LimitAccess | Out-Host }

	Dismount-Iso $isoFile
}