PowerShell, events and file watcher

A simple script that create a file watcher on a specific folder and collect the events in a global variable.

 

function watch-folder {
    param([string]$path)
    $fileSystemWatcher = new-object System.IO.FileSystemWatcher
    $fileSystemWatcher.Path = $path
    $global:events = new-object system.data.datatable
    [void] $events.Columns.Add("Time", [datetime])
    [void] $events.Columns.Add("Full path", [string])
    [void] $events.Columns.Add("Change type", [string])
    $event = {
        [void] $events.Rows.Add([datetime]::Now, $eventArgs.FullPath, $eventArgs.ChangeType)
    }
    [void](Register-ObjectEvent -InputObject $fileSystemWatcher -EventName Created -Action $event)
    [void](Register-ObjectEvent -InputObject $fileSystemWatcher -EventName Changed -Action $event)
    [void](Register-ObjectEvent -InputObject $fileSystemWatcher -EventName Deleted -Action $event)
}
cls
watch-folder "c:\Temp"
"foobar" > c:\temp\test.txt
del c:\temp\test.txt
$global:events
get-eventsubscriber -force | unregister-event -force