Vista Tutorial - Using the $_ pipeline with WMI

Newbie here...
I am trying to develop a list of software that needs to be uninstalled
on a computer.

I have the output list :
IdentifyingNumber name vendor
----------------- ---- ------
{01A4AEDE-F219-49A2-B855-16A016EAF9A4} Intel(R) PROSet II Intel


and am trying to iterate through the list and get-wmiobject for each
IdentifyingNumber , then Unintsall.

Here is what I have:
get-content "c:\productsintel.txt" |Get-WmiObject -Class win32_product
-Filter "IdentifyingNumber='$_.IdentifyingNumber'"


1) How do I reference the IdentifyingNumber correctly when reading the
file?
2) is the "filter" syntax correct?

Thanks
Larry

In this case it's better to use a CSV file to provide the software you want
uninstalled as you can import that back as an object

PoSH> $sw = (gwmi win32_product -prop IdentifyingNumber,name,vendor)

PoSH> $sw | select [a-z]* |? {$_.Vendor -eq 'Macromedia'}

IdentifyingNumber Name
Vendor
----------------- ----
------
{91057632-CA70-413C-B628-2D3CDBBB906B} Macromedia Flash Player 8 Plugin
Macromedia


PoSH> $sw | select [a-z]* |? {$_.Vendor -eq 'Macromedia'} | Export-Csv
Macromedia.csv

PoSH> Import-Csv Macromedia.csv |% {gwmi win32_product -filter
"Vendor='$($_.vendor)'"}


IdentifyingNumber : {91057632-CA70-413C-B628-2D3CDBBB906B}
Name : Macromedia Flash Player 8 Plugin
Vendor : Macromedia
Version : 8.0.22.0
Caption : Macromedia Flash Player 8 Plugin

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http://thePowerShellGuy.Com

"Larry R" <wantitoverwith@gmail.com> wrote in message
news:1177610197.702375.236720@t38g2000prd.googlegroups.com...
> Newbie here...
> I am trying to develop a list of software that needs to be uninstalled
> on a computer.
>
> I have the output list :
> IdentifyingNumber name vendor
> ----------------- ---- ------
> {01A4AEDE-F219-49A2-B855-16A016EAF9A4} Intel(R) PROSet II Intel
>
>
> and am trying to iterate through the list and get-wmiobject for each
> IdentifyingNumber , then Unintsall.
>
> Here is what I have:
> get-content "c:\productsintel.txt" |Get-WmiObject -Class win32_product
> -Filter "IdentifyingNumber='$_.IdentifyingNumber'"
>
>
> 1) How do I reference the IdentifyingNumber correctly when reading the
> file?
> 2) is the "filter" syntax correct?
>
> Thanks
> Larry
>

Ok, so now I have

$fileName = "C:\testUninstall.csv"
Import-csv $fileName |% {gwmi win32_product -filter
"IdentifyingNumber='$($_.IdentifyingNumber)'"}

I was trying to do this:
Import-csv $fileName |% { {gwmi win32_product -filter
"IdentifyingNumber='$($_.IdentifyingNumber)'"}
| foreach( write-host "Uninstalling " $_.name )

but I never get the name.

What is the |% syntax for?