How to retrieve associated value from second CSV in Foreach - powershell

Question

How would I go about obtaining the value of a secondary field in a CSV, while foreaching results in another CSV?
Ex: List of computers, then search for serial in list, then get response.
CSV1 has list of computer names, serials ,and vendor IDs.
CSV2 has list of vendor IDS, and responsible party
Sample code:
$systems = import-csv -path "K:\systems.csv"
$vendors = import-csv -path "K:\vendors.csv"
$vendortable= #{}
$vendors | ForEach-Object {
$vendortable[$_.vendorid] = New-Object -Type PSCustomObject -Property #{
'ID' = $_.vendorid
'Managed' = $_.Managed
}
}
Foreach ($computer in $systems){
$host = $system.Host
if ($vendortable.key -match $system.vendorid){
$xvendor = $vendortable.Managed
}
$vendorobj = New-Object PSObject -property #{
'Host'=$System.host
'Mgr=$xvendor
}
$vendorobj |Select-object "Host","Mgr" |Export /////////
This returns an object of All values System.Object[] in the vendor table, not just one.
CSV1
Host,Serial,VendorID
A15,gtjk123,9001
C15,gtjk456,6402
T15,gtjk678,2301
S15,gtjk103,0101
CSV2
VendorID,Managed
9001,Trancom
6402,Stratus
2301,Psycorp
0101,Dell

Answer 1

Let's break this down into steps.
You want to iterate over the entire vendor list.
You want to retrieve the associated host from CSV1 and combine with manager (based on your select statement)
What you can do is make a lookup table of CSV1 using Group-Object and the -AsHashTable parameter specifying the "key" as vendorid.
$csv1 = #'
Host,Serial,VendorID
A15,gtjk123,9001
C15,gtjk456,6402
T15,gtjk678,2301
S15,gtjk103,0101
'# | ConvertFrom-Csv | Group-Object -Property vendorid -AsHashTable
Now you can run through each item of CSV2 and extract the required info.
$csv2 = #'
VendorID,Managed
9001,Trancom
6402,Stratus
2301,Psycorp
0101,Dell
'# | ConvertFrom-Csv
$csv2 | foreach {
[PSCustomObject]#{
Host = $csv1[$_.vendorid].host
Managed = $_.managed
}
}
Host Managed
---- -------
A15 Trancom
C15 Stratus
T15 Psycorp
S15 Dell
If you wanted to get all the properties
$csv2 | foreach {
[PSCustomObject]#{
Host = $csv1[$_.vendorid].host
Managed = $_.managed
VendorID = $_.vendorid
Serial = $csv1[$_.vendorid].serial
}
}
Host Managed VendorID Serial
---- ------- -------- ------
A15 Trancom 9001 gtjk123
C15 Stratus 6402 gtjk456
T15 Psycorp 2301 gtjk678
S15 Dell 0101 gtjk103