Write value only once in CSV using powershell - powershell

Question

I am having the below code to write the data to csv
$myVMs = #(Get-VM -Server $vc | where {$_.PowerState -eq 'PoweredOn'} | select -Unique)
foreach ($myVM in $myVMs){
$VMDKs = $myVM | get-HardDisk
$VMDISKMode = $myVM
foreach ($VMDK in $VMDKs) {
if ($VMDK -ne $null){
$Diskmode = $VMDK.Persistence
if($Diskmode -ne 'Persistent')
{
$Report = [PSCustomObject] #{
Name = $myVM.name
Server = $vc
PowerState = $myVM.PowerState
Disk = $VMDK.Name
DiskMode = $VMDK.Persistence
}
$Report | Export-CSV -NoTypeInformation $File -Append
}
}
}
}
}
the output i am getting
Name Server PowerState Disk DiskMode
171_A92SV095 192.168.1.5 PoweredOn Hard disk 6 IndependentPersistent
171_A92SV095 192.168.1.5 PoweredOn Hard disk 7 IndependentPersistent
171_A92SV095 192.168.1.5 PoweredOn Hard disk 8 IndependentPersistent
171_A92SV095 192.168.1.5 PoweredOn Hard disk 10 IndependentPersistent
171_A92SV096 192.168.1.5 PoweredOn Hard disk 5 IndependentPersistent
171_A92SV096 192.168.1.5 PoweredOn Hard disk 10 IndependentPersistent
want the data like below
Name Server PowerState Disk DiskMode
171_A92SV095 192.168.1.5 PoweredOn Hard disk 6 IndependentPersistent
Hard disk 7
Hard disk 8
Hard disk 10
171_A92SV096 192.168.1.5 PoweredOn Hard disk 5 IndependentPersistent
Hard disk 10
Please let me know what changes I need to make in the code.

Answer 1

Taking the csv file you created with your code, you can use that as a basis to get the output you need like this:
$data = Import-Csv -Path 'D:\Test\VMInfo.csv'
# first group the data on the Name property
$data | Group-Object Name | ForEach-Object {
$name = $_.Name
# next, group that on property PowerState
foreach ($groupPowerState in ($_.Group | Group-Object PowerState)) {
$powerState = $groupPowerState.Name
# finally, group that on property DiskMode
foreach ($groupDiskMode in ($groupPowerState.Group | Group-Object DiskMode)) {
[PsCustomObject]#{
Name = $name
Server = $groupDiskMode.Group[0].Server
PowerState = $powerState
Disk = $groupDiskMode.Group.Disk -join [environment]::NewLine
DiskMode = $groupDiskMode.Name
}
}
}
} | Export-Csv -Path 'D:\Test\GroupedVMInfo.csv' -UseCulture -NoTypeInformation
This should give you a new CSV file you can double-click to open in Excel
Using your example data this would open in Excel as:
Of course, you don't need to write the report out to CSV and then read it back in if you would capture the output in variable $data like this:
$data = foreach ($myVM in $myVMs) {
$VMDKs = $myVM | Get-HardDisk
$VMDISKMode = $myVM
foreach ($VMDK in $VMDKs) {
if ($VMDK -ne $null) {
$Diskmode = $VMDK.Persistence
if($Diskmode -ne 'Persistent') {
[PSCustomObject] #{
Name = $myVM.name
Server = $vc
PowerState = $myVM.PowerState
Disk = $VMDK.Name
DiskMode = $VMDK.Persistence
}
}
}
}
}