How To Send An Email Whenever A File Gets Changed
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How To Send An Email Whenever A File Gets Changed
A little while ago, I fielded a question in the PowerShell Slack channel which was “How do I send an email automatically whenever a change is made to a specific file?”
Turns out it’s not too hard. You just need to set up a file watcher.
$watcher = New-Object System.IO.FileSystemWatcher
$watcher.Path = 'C:\temp\'
$watcher.Filter = 'test1.txt'
$watcher.EnableRaisingEvents = $true
$changed = Register-ObjectEvent $watcher 'Changed' -Action {
write-output "Changed: $($eventArgs.FullPath)"
}
First, we create the watcher, which is just a FileSystemWatcher object. Technically the watcher watches the whole directory for changes (the path), which is why we add a filter.
Then we register an ObjectEvent, so that whenever the watcher sees a change event, it performs an action. In this case, I just have it writing output but it could easily be sending an email or performing some other task.
To get rid of the ObjectEvent, just run the following.
Unregister-Event $changed.Id
It’s just that easy!
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