script to convert all .txt file content to lowercase

Question

I have about 700 .txt files scattered in 300 directories and sub-directories.

I would like to open each of them, convert all text inside to lowercase, including Unicode characters (such as É to é), then save and close them.

Can you advise how it could be done through PowerShell? It is my own computer and I have admin rights.

I have started with the below:

Get-ChildItem C:\tmp -Recurse -File | ForEach-Object {}

but I am not sure what to put between the brackets of ForEach-Object {}.

Answer 1

Simple script, with your requirements:

$path=".\test\*.txt"
#With Default system encoding
Get-ChildItem $path -Recurse | foreach{    
    (Get-Content $_.FullName).ToLower() | Out-File $_.FullName
}

#Or with specified encoding    
Get-ChildItem $path -Recurse | foreach{    
(Get-Content $_.FullName -Encoding Unicode).ToLower() | 
    Out-File $_.FullName -Encoding Unicode
}
#Test
Get-ChildItem $path -Recurse | foreach{
    Write-Host "`n File ($_.FullName): `n" -ForegroundColor DarkGreen
    Get-Content $_.FullName    
}