by oising
14. May 2007 00:09
Nrgghg, I feel another PowerShell project coming on ... enter PowerShell Eventing 0.5 Beta! With the magic of lightweight codegen, aka LCG, a smidgeon of reflection (well, quite a bit) and some inspiration, I managed to cough up this latest project.
While you cannot directly bind scriptblocks as eventhandlers, you can automatically route events in realtime to a background queue and deal with them in your time with a special Get-Event cmdlet. There is a sample walkthrough on the home page of the Wiki, and you can download a Sql backup script which shows progress reporting, all in script!
PS 1# Add-PSSnapin PSEventing
PS 2# $wc = new-object system.net.webclient
PS 3# get-eventbinding -IncludeUnboundEvents | ft -auto
VariableName EventName TypeName Listening
------------ --------- -------- ---------
wc Disposed WebClient False
wc DownloadDataCompleted WebClient False
wc DownloadFileCompleted WebClient False
wc DownloadProgressChanged WebClient False
wc DownloadStringCompleted WebClient False
wc OpenReadCompleted WebClient False
wc OpenWriteCompleted WebClient False
wc UploadDataCompleted WebClient False
wc UploadFileCompleted WebClient False
wc UploadProgressChanged WebClient False
wc UploadStringCompleted WebClient False
wc UploadValuesCompleted WebClient False
PS 4# Connect-EventListener wc disposed -verbose
VERBOSE: Target is a WebClient
VERBOSE: Now listening for 'disposed' events from $wc
PS 5# $wc.Dispose()
PS 6# get-event | ft -auto
Occurred Source Name Args
-------- ------ ---- ----
5/13/2007 8:04:20 PM variable:wc Disposed System.EventArgs
Have fun!