PowerShell script to export to single CSV - powershell

Question

I need help to get the following PowerShell script to output too just one .CSV file instead of the current two. Can someone please help? I'm wanting to get the SNMP settings that are set on remote servers. The information I'm after is held in the registry. $DellAdmKey is one key that holds SubKeys and refers to the "communityNames". Within each of the SubKeys I get the "Value Data" which refers to the "TrapDestinations". $DellAdmKey2 is a Key called "ValidCommunities" but does not have Subkeys, it just has DWORD values that refer to "AcceptedCommunityNames" and the "Rights". So the foreach on the 1st line can't be used as "ValidCommunities" does not contain SubKeys
$servers = "ServerName"
$BaseKey = [Microsoft.Win32.RegistryKey]::OpenRemoteBaseKey(‘LocalMachine’, $server)
$SubKey= $BaseKey.OpenSubKey("SYSTEM\\CurrentControlSet\\Services\\SNMP\Parameters",$true)
$DellAdmKey = $BaseKey.OpenSubKey("SYSTEM\\CurrentControlSet\\Services\\SNMP\\Parameters\\TrapConfiguration\\",$true)
$DellAdmKey2 = $BaseKey.OpenSubKey("SYSTEM\\CurrentControlSet\\Services\\SNMP\\Parameters\\ValidCommunities\\",$true)
$DellAdmKey.GetSubKeyNames() | foreach {
$action = $_
$subkey = $DellAdmKey.openSubKey($_)
$subkey.GetValueNames() | foreach {$_ | Select
#{name="ServerName";Expression={$server}},
#{Name="CommunityNames";Expression={$action}},
#{name="TrapDestinations";Expression={$subkey.getvalue($_)}}
} | Export-Csv c:\temp\1.csv -NoTypeInformation
}
$action = $_
$subkey = $DellAdmKey2.openSubKey($_)
$subkey.GetValueNames() | foreach {
$_ | Select #{name="ServerName";Expression={$server}},
#{name="AcceptedCommunityNames";Expression={$_}},
#{name="Rights";Expression={$subkey.getvalue($_)}}
} | Export-Csv c:\temp\2.csv -NoTypeInformation

Answer 1

If I understand your question (and your code) correctly, the third group of instructions is supposed to go inside the $DellAdmKey.GetSubKeyNames() | foreach { ... }. In that case you simply need to move the | Export-Csv outside that loop to capture all output in one CSV. You need to make sure all objects have the same set of properties, though.
$DellAdmKey.GetSubKeyNames() | foreach {
$action = $_
$subkey = $DellAdmKey.openSubKey($action)
$subkey.GetValueNames() | Select #{name="ServerName";Expression={$server}},
#{Name="CommunityNames";Expression={$action}},
#{name="TrapDestinations";Expression={$subkey.getvalue($_)}}
#{name="AcceptedCommunityNames";Expression={}},
#{name="Rights";Expression={}}
$subkey = $DellAdmKey2.openSubKey($action)
$subkey.GetValueNames() | Select #{name="ServerName";Expression={$server}},
#{Name="CommunityNames";Expression={}},
#{name="TrapDestinations";Expression={}},
#{name="AcceptedCommunityNames";Expression={$_}},
#{name="Rights";Expression={$subkey.getvalue($_)}}
} | Export-Csv 'c:\temp\out.csv' -NoTypeInformation
Edit: If you really just want to run the code as you posted (which seems somewhat dubious to me, since $_ in line 17 should be empty), you could change the second Export-Csv instruction to
... | Export-Csv 'c:\temp\1.csv' -Append -NoTypeInformation
provided you're running PowerShell v3. Prior to that something like this should do:
... | ConvertTo-Csv -NoTypeInformation | select -Skip 1 |
Out-File 'c:\temp\1.csv' -Append
Either way you should make sure all the objects you're exporting have the same set of properties, though. Otherwise you might end up with Rights values in the TrapDestination column or some such.

Answer 2

I have resorted to using this http://psrr.codeplex.com/ it make life easier. Thanks for the replies Ansgar.