Powershell | Rename file with random name - powershell

Question

I'm making a script to rename a specific file with a random name. But when running, the following error always occurs:
It is not possible to convert the value ".jpg" to the type "System.Int32". Error: "The input string was not in the correct format."
In C:\Windows\system32\WindowsPowerShell\v1.0\Modules\SetDiscordWallpaper\SetDiscordWallpaper.ps1:7 character:7
+ Rename-Item -Path $file.FullName -NewName ($random + $file.Exte ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidArgument: (:) [], RuntimeException
+ FullyQualifiedErrorId : InvalidCastFromStringToInteger
Here is the code I am using
function Set-DiscordWallpaper {
$path = "C:\Windows\Temp\*"
foreach($file in $(Get-ChildItem -Path $path -Include "Wallpaper.jpg")) {
$extension = [System.IO.Path]::GetExtension($file.FullName);
$randomName = [System.IO.Path]::ChangeExtension([System.IO.Path]::GetRandomFileName(), $extension)
$newPath = "C:\inetpub\wwwroot\"
Write-Host "Changing File $($file.Name) to $randomName"
Move-Item -Path $file.FullName -Destination $newPath
}
}
I ask you to help me please. I'm waiting the answer. Thanks

Answer 1

The code (second part in your question) creates the new random filename just fine, only the line Move-Item -Path $file.FullName -Destination $newPath does nothing with that new name and moves the file with its original name to the new path.
Change that line to
Move-Item -Path $file.FullName -Destination (Join-Path -Path $newPath -ChildPath $randomName)
so the file gets moved with the random name in the new path.
Or is your intention to copy the file to its new destination keeping the original filename there and after that rename the original?
In that case do:
Write-Host "Changing File $($file.Name) to $randomName"
Copy-Item -Path $file.FullName -Destination $newPath # copy with original name
$file | Rename-Item -NewName $randomName # rename the original file