In my previous post, I mentioned changing some PowerShell cmdlets.  Here’s the definition for the cmdlet used to create a new item:

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It’s simple enough:  You specify the required mode and display name, and one of several switches.  If specified, the setting is enabled; if left out, the setting is disabled.  Fairly standard stuff.

But then you need an equivalent cmdlet for making changes to an existing item.  So I set up one that looks pretty much the same, where the ID (a GUID assigned when the item was originally created) is used to identify which item to change.

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That’s pretty much a mirror of the “new” cmdlet.  And both of those were based on the original posted by Damien Van Robaeys, which I talked about earlier.  But notice how I made some “improvements” to his original setup:  Instead of having boolean parameters that specify $true and $false to turn things on and off, I switched to using switch parameters, where “present” means on and “absent” means off.  A great simplification, right?  I was happy, at least until I started testing the two cmdlets.  The “new” one did exactly what I wanted, but the “Set” one to update an existing item had a flaw:  There was no way to use it to turn off a switch that was already on.  (Absence of a parameter means “don’t change it,” not “set it back to off.”)

So rather than backtrack and use boolean parameters again (leading to things like “-OOBE_HideEULA $true” and “-OOBE_HideEULA $false”), I cheated.  I added two more parameters:

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If you specify “-AllEnabled” it flips all the switches on; if you specify “-AllDisabled” it flips all the switches off.  So, you can work around the problem I created with two sequential commands, one to turn everything off and a second one to turn back on just the items that you want.  It’s a little hack-ish, but it was easy and I wanted to go to sleep.

The joys of PowerShell Smile

The post p.s. A PowerShell conundrum appeared first on SystemCenterConsultants Ltd..

The post p.s. A PowerShell conundrum appeared first on SystemCenterConsultants Ltd..

The post p.s. A PowerShell conundrum appeared first on SystemCenterConsultants Ltd..

The post p.s. A PowerShell conundrum appeared first on SystemCenterConsultants Ltd..

The post p.s. A PowerShell conundrum appeared first on SystemCenterConsultants Ltd..

The post p.s. A PowerShell conundrum appeared first on SystemCenterConsultants Ltd..

The post p.s. A PowerShell conundrum appeared first on SystemCenterConsultants Ltd..

The post p.s. A PowerShell conundrum appeared first on SystemCenterConsultants Ltd..

The post p.s. A PowerShell conundrum appeared first on SystemCenterConsultants Ltd..

The post p.s. A PowerShell conundrum appeared first on SystemCenterConsultants Ltd..

The post p.s. A PowerShell conundrum appeared first on SystemCenterConsultants Ltd..

The post p.s. A PowerShell conundrum appeared first on SystemCenterConsultants Ltd..

The post p.s. A PowerShell conundrum appeared first on SystemCenterConsultants Ltd..

The post p.s. A PowerShell conundrum appeared first on SystemCenterConsultants Ltd..