A simple Try/catch doesn't working - exception

Question

This is my code, it's very simple:
$TargetFolder = 'M:\'
try{
$Getfolderlist = Get-ChildItem $TargetFolder -Recurse | ? { $_.PSIsContainer -and $_.Name -eq 'old' }
}catch {
Write-Host "Error ! :) "
}
It doesn't work and I get an powershell exception:
Get-ChildItem : Cannot find drive. A drive with the name 'M' does not exist.
At C:\ef-scripts\PurgeDeliveryZip\purge_delivery_zip.ps1:23 char:18
+ $Getfolderlist = Get-ChildItem $TargetFolder -Recurse | ? { $_.PSIsContainer -an ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : ObjectNotFound: (M:String) [Get-ChildItem], DriveNotFoundException
+ FullyQualifiedErrorId : DriveNotFound,Microsoft.PowerShell.Commands.GetChildItemCommand
Thanks for your help.

Answer 1

You need -ErrorAction set to Stop. This way the catch block gets the exception. Read about try catch usage here: http://technet.microsoft.com/en-us/library/hh847793.aspx
Also, you may want to read about terminating errors in PowerShell and ErrorAction common parameter helps.
$TargetFolder = 'M:\'
try{
$Getfolderlist = Get-ChildItem $TargetFolder -Recurse -Ea Stop | ? { $_.PSIsContainer -and $_.Name -eq 'old' }
}
catch {
Write-Host "Error ! :) "
}