powershell - PowerCLI strange behaviour of variable -


trying collect few properties of vms, reasons entries in output contains info last vm only

the $csv contains couple of vm names:

vmname centos1 centos2

here code i'm using:

$vmdata = @() $line = '' | select vmname, vmtoolstatus, vmtoolversion, uuid, tag, notes  foreach($entry in $csv){     $line.vmname = $entry.vmname     $line.vmtoolstatus = (get-vm $entry.vmname).extensiondata.guest.toolsrunningstatus     $line.vmtoolversion = (get-vm $entry.vmname).extensiondata.guest.toolsversion     $line.uuid = (get-vm $entry.vmname).extensiondata.config.uuid     $line.notes = (get-vm $entry.vmname).notes     $line.tag = get-vm $entry.vmname | get-tagassignment | select -expandproperty tag  | select name     $vmdata += $line }  $vmdata | export-csv -path c:\report.csv -notypeinformation -force

here csv output - can see both lines contain info vm centos2.

"vmname","vmtoolstatus","vmtoolversion","uuid","tag","notes","startuporder"  "centos2","guesttoolsrunning","2147483647","564d7fd7-e58f-e546-ecdf-c347e35cd453",,"test note",  "centos2","guesttoolsrunning","2147483647","564d7fd7-e58f-e546-ecdf-c347e35cd453",,"test note",

when debug can see after first cycle $line updated correct information of vm centos1 , added $vmdata.

however, when second cycle starts, e.g. after executing line.vmname = $entry.vmname can see both variables $line , $vmdata updated centos2 name.

so, question why $vmdata gets updated along $line?

i used piece of code before , worked fine.

i running following version of ps

major  minor  build  revision -----  -----  -----  -------- 5      1      14393  1480

vmware powercli 6.5 release 1 build 4624819

you can fix moving $line = '' part inside foreach loop:

$vmdata = @()  foreach($entry in $csv){     $line = '' | select vmname, vmtoolstatus, vmtoolversion, uuid, tag, notes     $line.vmname = $entry.vmname     $line.vmtoolstatus = (get-vm $entry.vmname).extensiondata.guest.toolsrunningstatus     $line.vmtoolversion = (get-vm $entry.vmname).extensiondata.guest.toolsversion     $line.uuid = (get-vm $entry.vmname).extensiondata.config.uuid     $line.notes = (get-vm $entry.vmname).notes     $line.tag = get-vm $entry.vmname | get-tagassignment | select -expandproperty tag  | select name     $vmdata += $line }  $vmdata | export-csv -path c:\report.csv -notypeinformation -force

i believe problem occurs because in instance powershell variable acting pointer (a reference type), when update $line second time affects existing result in $vmdata.

by moving $line = '' inside loop reset variable on each iteration doesn't act way.

i recommend instead:

$csv | foreach-object {     $props = @{         vmname = $_.vmname         vmtoolstatus = (get-vm $_.vmname).extensiondata.guest.toolsrunningstatus         vmtoolversion = (get-vm $_.vmname).extensiondata.guest.toolsversion         uuid = (get-vm $_.vmname).extensiondata.config.uuid         notes = (get-vm $_.vmname).notes         tag = (get-vm $_.vmname | get-tagassignment | select -expandproperty tag  | select name)     }     new-object -typename psobject -property $props } | export-csv -path c:\report.csv -notypeinformation -force

this uses hashtable create powershell object within foreach-object loop can pipe output directly export-csv.


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