How do I compare two csv files and not disable the user if the username is found in the 2nd file using powershell?

Question

Hi Guys
I have two csv files with the following headers and I need to import both files into the script to check whether the StaffCode is present in the Creation/Renewal of Contract csv in a DisableAccount Script so I can stop any action to disable the account as
the staff has renewed the contract with the company so the account should not be disabled.
However my accounts are still being disabled. I am not sure now to construct the query so that it detects that the account is to be left alone if the staffcode is present in both files
I does recognize that the $staffcodeN in the renewal file matches the $staffcode in the termination file
but still proceeds to disable or set an expiry date to the account anyway based on the termination file. 
How do I stop it from doing that?
1)In the Creation/Renewal of contract file the following headers are present
     -  TranCode,StaffCode,LastName,FirstName,SocialSecurityNo,DateJoin,Grade,Dept,LastUpdateDate,EffectiveDate
2)In the Disable of contract file the following headers are present
    - TranCode,StaffCode,LastName,FirstName,SocialSecurityno,LastDateWorked,Grade,Dept,LastUpdateDate,
My data is not very clean , I have a-lot of special characters such as = , ' ,/ and \ characters to remove first before i can compare the data
Thanks for the help in advance.
Yours Sincrely
Vicki
The following is a short snippet of the code 
$opencsv = import-csv "D:\scripts\Termination.csv"
$opencsv2 = import-csv "D:\scripts\RenewContractandNewStaff.csv"
foreach ($usertoaction in $opencsv) 
$Trancode = $usertoactionTranCode
$StaffCode = $usertoaction.StaffCode.replace("=","").replace('"','')
$LastName = [string]$usertoaction.LastName.Replace("/","\/").Replace(",","\,")
$FirstName = [string]$usertoaction.FirstName.Replace("/","\/").Replace(",","\,")
$socialsecurityno = $usertoaction.SocialSecurityNo.replace("=","").replace('"','')
$DateJoin = $usertoaction.DateJoin.replace("=","").replace('"','')
$LastDateWorked = $usertoaction.LastDateWorked.replace("=","").replace('"','')
$Grade = [string]$usertoaction.Grade
$Dept = [string]$usertoaction.Dept
$LastUpdateDate = $usertoaction.LastUpdateDate.replace("=","").replace('"','')
$AccountExpiry = [datetime]::Now.ToString($LastDateWorked)
foreach ($usertoaction2 in $opencsv2) 
$TrancodeN = $usertoaction2.TranCode
$StaffCodeN = $usertoaction2.StaffCode.replace("=","").replace('"','')
$socialsecurityNoN= $usertoaction2.SocialSecurityNo.replace("=","").replace('"','')
$DateJoinN = $usertoaction2.DateJoin.replace("=","").replace('"','')
$GradeN = [string]$usertoaction2.Grade
$DeptN = $usertoaction2.Dept
$LastUpdateDate = $usertoaction.LastUpdateDate.replace("=","").replace('"','')
$EffectiveDate = $usertoaction.EffectiveDate.replace("=","").replace('"','')
$LastName2 = [string]$usertoaction2.LastName.Replace(",", "").Replace("/","").trim()
$FirstName2 = [string]$usertoaction2.FirstName.Replace("/","").trim()
# Use DirectorySearcher to find the DN of the user from the sAMAccountName.
$Domain = [System.DirectoryServices.ActiveDirectory.Domain]::GetCurrentDomain()
$Root = $Domain.GetDirectoryEntry()
$Searcher = [System.DirectoryServices.DirectorySearcher]$Root
$Searcher.Filter = "(sAMAccountName=$samaccountname)"
$doesuserexist1 = $Searcher.Findall()
if ($doesuserexist1 -eq $Null)
{Write-Host $samaccountname "account does not exist"}
elseif ($StaffCodeN -match $staffcode)
write-host "user has renewed the contract, no action taken"
else
if(($lastupdatedate -ne $null)-or($LastDateWorked -ne $null))
                    write-host "Setting Account Expiry to"$accountexpirydate
#$ChangeUser.AccountExpires = $accountexpirydate
           #$Changeuser.setinfo()
if ($UserMailforwarding -ne $null)
#Set Account expiry date to Last Date Worked
# $ChangeUser.AccountExpires = $accountexpirydate
# $Changeuser.setinfo()
 write-host "staff" $displayname "with staff employee no" $samaccountname "has                          
mailforwarding" 
Write-host "Please disable the account manually via Active Directory Users & Computers and 
Elseif ($accountexpirydate -lt $todaysdate)
#disable the account

Answer 1

Hi Vicki,
This Forum has an insert-codeblock function. Using it will make your script far more readable
Your script is missing some parts, it is impossible to follow the problem.
You are performing the same string cleaning action on $opencsv2 for each element in $opencsv, when doing it once should suffice. Why not start it all by cleaning the values and storing the cleaned values in new arrays?
The Compare-Object function is great, why not take it out for a stroll on these lists, it might just safe you lots of unnecessarily complicated code ...
You are creating a new $Domain, $Root and $Searcher object each iteration, when doing it once should suffice. Probably not much of a time-saver, but every little thing contributes.
Try pinpointing the problem by doing extensive logging, not only by writing which action was taken, but writing the inidividual information (variables, mostly) before evaluation occurs. Your if/elseif/else looks sound, so if it's still not doing what you
want, the ingoing data must be different from what you think should be there.
Cheers,
Fred
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