Using variables in Get-WmiObject filters? 1

[shinedog]

So I think this should be pretty easily but its something I constantly trip over.

In this specific example, I am trying to compress a folder. The following code works fine:

(Get-WmiObject -class "Win32_Directory" -filter "name='C:\\Windows\\System32\\LogFiles'").Compress()

However for obvious reasons, I don't want to hard-code common paths into my scripts. So instead of C:\Windows, I'd like to use $env:systemroot. However, Get-WmiObject always seems to choke when plugging in variables into parameters. Any variation of using that variable fails with "Get-WmiObject : Invalid Query". An example of what I am trying to do is listed below:

(Get-WmiObject -class "Win32_Directory" -filter "name=$env:systemroot\\System32\LogFiles").Compress()

Is what I want to do even possible? If it is, I bet I'm overlooking something pretty simple?

 

[markdmac]

The problem is that your env variable only has a single slash in it. To prove this run the following:

$x = "name=$env:systemroot\\System32\\LogFiles"
$x

So, try this instead

$Mypath = "name='"+$env:SystemRoot.Replace("\","\\")+"\\system32\\logfiles'";(Get-WmiObject -class "Win32_Directory" -filter "$Mypath").Compress()

I hope you find this post helpful.

Regards,

Mark

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