Tagged: Function

Change a folder LastWriteTime based on files within it

A few days ago I wrote a script that copies some files. Did notice that everything except the date on the folders were ok. So I added a few more lines of powershell code.

Did find a few suggestions on the web, but I like this one…. Since I wrote it. 😛

Function Set-FolderDate {
	Param (
		[string] $Path
	Trap  [Exception] {
		Write-Debug $("TRAPPED: " + $_.Exception.Message); 
		Write-Verbose "Could not change date on folder (Folder open in explorer?)"

	# Get latest filedate in folder
	$LatestFile = Get-ChildItem $Path | Sort-Object LastWriteTime -Descending | Select-Object -First 1

	# Change the date, if needed
	$Folder = Get-Item $path
	if ($LatestFile.LastWriteTime -ne $Folder.LastWriteTime) {
		Write-Verbose "Changing date on folder '$($Path)' to '$($LatestFile.LastWriteTime)' taken from '$($LatestFile)'"
		$Folder.LastWriteTime = $LatestFile.LastWriteTime

	Return $Folder

Set-FolderDate -Path "D:\temp"