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Count of WMIObject returns null instead of 1

Count of WMIObject returns null instead of 1

Count of WMIObject returns null instead of 1


Can someone tell me what is wrong with my .count statement that it returns no value (null) instead of one. See my code snip below and result. This does work if I have >1 job returned

$thresholdTime = (Get-Date).Addhours(-4)
$printJobs = Get-WmiObject Win32_PrintJob -ComputerName gdceps02w12v | Where-Object {[System.Management.ManagementDateTimeConverter]::ToDateTime($_.TimeSubmitted) -lt $thresholdTime -and $_.Name -like '*mbprt*'}
$pcnt = $printJobs.count

Write-Host "Server $server : Found ["$pcnt"] print jobs."
Here's the output:

Document : 6628207BE12744FBA141193013DA97AC-tmpacea
JobId : 254
JobStatus : Error | Printing
Owner : srve
Priority : 1
Size : 1314
Name : bkr_tst9_mbprt, 254

Server gdceps02w12v : Found [ ] print jobs.


RE: Count of WMIObject returns null instead of 1

PowerShell has a habit of unwrapping an array if there is one or no entries in the array. You can force the datatype of a variable. I would suggest you make the following change:

[array] $printJobs = Get-WmiObject Win32_PrintJob -ComputerName gdceps02w12v |
    Where-Object {[System.Management.ManagementDateTimeConverter]::ToDateTime($_.TimeSubmitted) -lt $thresholdTime -and $_.Name -like '*mbprt*'} 

Once you do that it will force the return value to an array. If Get-WmiObject returns $null then $printJobs.Count would equal 0.

Also Get-WmiObject is deprecated. I would suggest you use Get-CimInstance instead.

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