PowerShell Magazine - Latest Comments

Re: Converting to size units (KB, MB,GB,TB, and PB) without using PowerShell multipliers

DVS — Tue, 21 May 2013 15:15:56 -0000

Great idea using the compound assignment operator.

Re: Converting to size units (KB, MB,GB,TB, and PB) without using PowerShell multipliers

Jaap Brasser — Tue, 21 May 2013 07:57:55 -0000

My solution would be to bypass using [Math]::Pow in order to make it shorter. So I would go for this:

$s = 1234567890123456

1..5|%{[Math]::Floor(($s/=1024))}

Re: Converting to size units (KB, MB,GB,TB, and PB) without using PowerShell multipliers

Vladimír Meier — Tue, 21 May 2013 02:35:39 -0000

1..5|%{[math]::truncate(123456789/[math]::pow(1024,$_))}

Re: Converting to size units (KB, MB,GB,TB, and PB) without using PowerShell multipliers

Vinith Menon — Tue, 21 May 2013 00:33:48 -0000

PS C:\> $size = 12345678901234568989

PS C:\> 1..5 | % { [math]::Round(($size/[Math]::Pow(1024,$_)),0)}

12056327051986884

11773756886706

11497809460

11228330

10965

Re: Converting to size units (KB, MB,GB,TB, and PB) without using PowerShell multipliers

Ravikanth — Tue, 21 May 2013 00:11:06 -0000

Anything except PowerShell multipliers is absolutely allowed. All you need is the shortest answer!

Re: Converting to size units (KB, MB,GB,TB, and PB) without using PowerShell multipliers

DVS — Mon, 20 May 2013 22:09:09 -0000

$size = 1234567890123456
1..5|%{"{0:N0}"-f($size/[math]::pow(1024,$_))}

Re: PowerShell Summit 2013: Build Your Demo Environment or a Test Lab with Windows PowerShell

Aleksandar Nikolić — Mon, 20 May 2013 18:02:13 -0000

Yes, there is only one slide. That's why I've added a smiley. :)
I hope you'll enjoy the demo code.

Re: PowerShell Summit 2013: Build Your Demo Environment or a Test Lab with Windows PowerShell

Cincinnerdi — Mon, 20 May 2013 17:44:09 -0000

Is it just me, or is the slide deck just one slide?
Anyway, I'm getting a lot of benefit from looking thru the PowerShell script.

Re: Converting to size units (KB, MB,GB,TB, and PB) without using PowerShell multipliers

Kevin Doblosky — Mon, 20 May 2013 17:18:02 -0000

I added a few digits to $size, otherwise I get 0 for everything beyond GB:

$size = 1234567890123456
1..5 | % { [Math]::Floor($size/[Math]::Pow(1024, $_))}

Re: Converting to size units (KB, MB,GB,TB, and PB) without using PowerShell multipliers

James Birley — Mon, 20 May 2013 16:15:56 -0000

Maybe I am missing something, but wouldn't this do the trick? Or is using .NET not allowed?

1
2
3
4
5
6$size = 123456789

[int]($size / [math]::pow(1024,1))
[int]($size / [math]::pow(1024,2))

[int]($size / [math]::pow(1024,3))

[int]($size / [math]::pow(1024,4))

Re: Converting to size units (KB, MB,GB,TB, and PB) without using PowerShell multipliers

Vladimír Meier — Mon, 20 May 2013 16:04:53 -0000

$i=1;1..5|%{[math]::truncate(123456789/[math]::pow(1024,$i));$i++}

Re: #PSTip Validate your custom objects

Sahal — Fri, 17 May 2013 22:29:23 -0000

Nice trick, i was trying to add a function to generate a method on customobjec, but couldnt success, could you please give an example of it?

Re: #PSTip Finding the drive letter of a mounted disk image

Dene Delower — Wed, 15 May 2013 21:21:31 -0000

Hi Ravikanth ,thanks i might need to use this , Is there a way to brouse or read the vhd file without mounting it, I have a need to scan vhd drives on our virtual machines to find unlicensed software. cheers Dene

Re: Better Restart-Computer cmdlet in PowerShell 3.0

Leon — Tue, 14 May 2013 05:49:03 -0000

and what if I have error

Restart-Computer : Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCE
SSDENIED))
At line:1 char:17
+ Restart-Computer <<<< -computername WOC-dev-WD2
+ CategoryInfo : NotSpecified: (:) [Restart-Computer], Unauthorized
AccessException
+ FullyQualifiedErrorId : System.UnauthorizedAccessException,Microsoft.Power
Shell.Commands.RestartComputerCommand

What shoul be checked or aded in to the command ?

Re: New PowerShell Book: PowerShell 3.0 Advanced Administration Handbook

Vladimír Meier — Mon, 13 May 2013 07:18:41 -0000

Does anyone have this book? I will be glad if you write a review.

Re: #PSTip Working with the Windows.Forms.Screen Class

ShayLevy — Sat, 11 May 2013 06:28:59 -0000

Windows.Forms is used by C# or PowerShell to build graphical user interfaces, I don't see any reason why not to use them. Another option would be to use WPF.

Re: #PSTip ValidatePattern – Friendlier error messages

Bartek Bielawski — Sat, 11 May 2013 04:26:06 -0000

I would stay it's v1 mandatory parameter... And currently: "force" mandatory parameter (unlike [Parameter(Mandatory)]), it won't prompt, it will fail. ;) But yes, this technique is pretty cool. :)

Re: #PSTip ValidatePattern – Friendlier error messages

Bartek Bielawski — Sat, 11 May 2013 04:22:08 -0000

For ValidateScript your best option may be just throw-ing cumstom message. :)
function Boom { param ( [ValidateScript({ throw "Ha! Default value is perfect! Why change it???" })] [string]$Bam = 'Perfect!' ) "It's $Bam!" }
If you would try it with any parameter passed:
Boom -Bam Awesome Boom : Cannot validate argument on parameter 'Bam'. Ha! Default value is perfect! Why change it???

Re: #PSTip ValidatePattern – Friendlier error messages

DVS — Fri, 10 May 2013 17:49:25 -0000

param(

[String]$parameter = $(throw "parameter must be specified.")

)

This is a pretty tricky way to have a default parameter.

Re: #PSTip Working with the Windows.Forms.Screen Class

DVS — Fri, 10 May 2013 13:03:43 -0000

What are your thoughts on building GUIs with PowerShell. Some people say that if you want a GUI use C# or an HTA. Are PowerShell GUIs ok to use, or are they not part of the "best practices?"

Re: #PSTip ValidatePattern – Friendlier error messages

Rob Campbell — Fri, 10 May 2013 07:42:05 -0000

Nice solution for regex validation.
For validation scripts in general, since the error message is going to display the validation script block, you can include helpful information by putting comment line in the validation script block, and it will be displayed in the error message.

Re: PowerShell Summit 2013 session recordings

DVS — Thu, 09 May 2013 15:40:10 -0000

Groovy

Re: Provisioning and Licensing Office 365 Accounts with PowerShell

Bryan — Tue, 30 Apr 2013 12:16:45 -0000

Let's say I have a lot of users who were initially licensed with the E3 license above with everything except Exchange. A year passes. Now your business wants to use Exchange as well. How would you add just the Exchange component to the existing licenses?

Re: #PSTip Enumerate all SQL Server instances in a network

Ravikanth — Wed, 24 Apr 2013 22:11:37 -0000

Yes, you are correct. I guess it was an issue with not copy / pasting the code and trying to type it in! :)

Re: #PSTip Enumerate all SQL Server instances in a network

Elijah Gagne — Wed, 24 Apr 2013 18:53:50 -0000

I'm getting:
Add-Type -AssemblyName "Microsoft.SqlServer.Smo, Version=10.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91"
[Microsoft.SqlServer.Management.Smo.SmoApplication]::EnumAvailableServers($true)

Method invocation failed because [Microsoft.SqlServer.Management.Smo.SmoApplication] doesn't contain a method named 'EnumAvailableServers'.

I think the method name should be: EnumAvailableSqlServers
http://msdn.microsoft.com/en-u...