Trouble with nested foreach loop

Question

I got 3 nested foreach loop but the 2nd and the third one outputs no data.
$vss = "vSwitch3"
$vmhost_array = @("host1,host2,host3")
$vss_vlan_array = @("vlan50")
$dvs_vlan_array = @("n1kv_vms_vlan50")
foreach ($vmhost in $vmhost_array) {
foreach ($vss_vlan in $vss_vlan_array) {
foreach ($dvs_vlan in $dvs_vlan_array) {
Get-VMHost $vmhost | Get-VirtualSwitch -Name $vss | Get-VirtualPortGroup -Name $vss_vlan | Get-VM | Get-NetworkAdapter | Set-NetworkAdapter -Portgroup $dvs_vlan -Confirm:$false
I get runtime error at Get-VirtualSwitch -Name $vss 
$vss says vlan50 not found. but its there. anything wrong with this nested foreach?

Answer 1

hi
I am actually getting an error on 
Get-VirtualPortGroup -Name $($vss_vlan_array[$i])
Its trying to give me the whole array instead of the 1st item in the array. so get-virtualportgroup will fail.
I checked it with $vss_vlan_array[0] and gives me 
"vlan50","vlan49"
how do one item at a time instead of the whole array?