Want to store output in an array

Question

I have a list of servers. I want to check what all automatic services are not running. I want to store it in array and later display in grid view format. I tried below, but it didn't work.

foreach ($i in $list) {
    $Res = @(Get-WmiObject Win32_Service -ComputerName $i | Where-Object {
               $_.StartMode -eq 'Auto' -and $_.State -ne 'Running'
           } | Select PSComputerName, Name, DisplayName, State, StartMode)
}

$Res | Out-GridView

Ansgar Wiechers · Accepted Answer · 2016-03-29 15:25:48Z

1

Assigning values to $Res inside the loop overwrites the value with every loop cycle. for a construct like that you'd need to define the variable as an array outside the loop and then append to it:

$Res = @()
foreach ($i in $list) {
    $Res += Get-WmiObject ...
}

However, this is bound to perform poorly. It's usually better to just assign the output generated in the loop to the variable:

$Res = foreach ($i in $list) {
    Get-WmiObject ...
}

answered Mar 29, 2016 at 15:25

Ansgar Wiechers

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