Import-CSV Where -notmatch list of array values - arrays

Question

I am trying to import a csv file where it doesn't import any values that are listed in an array declared above the import line. The array is made up of certain values that are pulled out of a database and I wan't to import all rows in the csv file that the txnID column values do not match the values in the array however I am having trouble trying to loop through my array.
I am new to using powershell and maybe I am not even implementing the array correctly but I haven't been able to find anything about import-csv Filename |Where column -notmatch $array
$Database = 'Database'
$Server = "Server"
$SqlQuery = 'SELECT DISTINCT WebOrderNumber FROM tbOrders
WHERE WebOrderNumber IS NOT NULL AND Len(WebOrderNumber)>8'
$SqlConnection = New-Object System.Data.SqlClient.SqlConnection
$SqlConnection.ConnectionString = "Data Source=Datasource;Initial Catalog=Database;User ID=ID;Password=Pass;Integrated Security=False;"
$SqlCmd = New-Object System.Data.SqlClient.SqlCommand
$SqlCmd.CommandText = $SqlQuery
$SqlCmd.Connection = $SqlConnection
$SqlConnection.Open()
$SqlAdapter = New-Object System.Data.SqlClient.SqlDataAdapter
$SqlAdapter.SelectCommand = $SqlCmd
$Reader = $SqlCmd.ExecuteReader()
while ($Reader.Read()) {
#write-Output($Reader.GetValue($0))
$Key = $Reader.GetValue($0)
$table += $Key
}
foreach ($Row in $table){
write-output($Row)
$CSVFile = (import-csv "C:\Users\Office-Admin\Documents\Complete Sales Orders.csv") |where {$_.txnID -ne $Row} | select txnID, FirstName, LastName, Cust_Name, mc_Shipping, Payment_Gross, address_street, Address_Zip, quantity, item_name, item_number, payer_email, address_city, address_state, address_country, address_name, Shipping_Method, mc_gross
}
$CSVFile | export-csv "C:\Users\Office-Admin\Documents\Sales Order Import List.csv" -notypeinformation
remove-item variable:table
#Send SMTP Message
$SqlConnection.Close()
I've updated my code slightly however the problem still persists. I'm realizing that I believe with the code now, everytime I loop through and import, the previous condition in the where is forgotten so the only value that is not imported in the end is the last $Row value but I need all of the values in $table to be excluded and I don't know how I can do this.

Answer 1

Something list this should work. The main problem is you are over writing your csv every loop.
$table = import-csv file1.csv | % {$_ID} #gets array of just the ID values
$CSVFile = Import-csv file2.csv | where{$table -notcontains $_.ID} | export-csv output.csv -notypeinformation
To show you how this works I created to files as an example:
File 1: CSV with IDs:
ID,Stuff
123,alittlestuff
234,morestuff
345,evenmore
456,alotmore
567,somemore
678,notsomuch
789,tonesofstuff
File 2: csv with ID and stuff:
ID,stuff
123,hello
ghf,world
234,test
lkj,this
after running the code the only rows that get output are:
ID,Stuff
ghf,world
lkj,this
So I think to fit it into your code use this:
$filter = $table | %{$_.txnID}
$CSVFile = (import-csv "C:\Users\Office-Admin\Documents\Complete Sales Orders.csv") | where{$filter -notcontains $_.txnID} || export-csv "C:\Users\Office-Admin\Documents\Sales Order Import List.csv" -notypeinformation