Windows Powershell Export-CSV column/row value as filename - powershell

Question

I'm having a problem with Powershell. I need to import a csv file, format it and export it.
Now one of the fields is the same value on every line so I want to name the export file the same as a cell value.
I am importing the csv with
Import-Csv c:\tmp\200114.csv
Formatting the output with
Select-Object #{expression={$_.code}; label='ID NUMBER'} etc etc but one of the fields being DESCRIPTION
Then exporting with:
Export-Csv -NoTypeInformation c:\tmp\test1.csv
So basically I want to name the file something like the following where DESCRIPTION is the Field name and the row is 1(as they are all the same):
Export-Csv -NoTypeInformation c:\tmp\#{expression={$_.DESCRIPTION[1]};}.csv
But I just get:
Export-Csv : Cannot validate argument on parameter 'Delimiter'. The argument is null. Supply a non-null argument and tr
y the command again.
Ideally I could like the file name to be:
Todays Date - DESCRIPTION Column ROW 1 Value.csv
Many thanks for any input....
SAMPLE DATA:
ID NUMBER,NAME,ADDRESS 1,ADDRESS 2,CITY,STATE,ZIP,Spare,PHONE #,DESCRIPTION,Spare,Spare,VALUE
1,Name 1,address 1,address 2,city 1,state 1,zip 1,,Phone 1,CC098-1,,,NCV
2,Name 2,address 2,address 3,city 2,state 2,zip 2,,Phone 2,CC098-1,,,NCV
Thanks, I am very grateful for this. I am struggling to get this working though. It must be to do with:
Select #{n='ID NUMBER';e={$_.code}}, #{n='DESCRIPTION';e={...}}
I Don't know the Select command and can't find anything on it, I can't even see how the n= & e= etc are doing. I trimmed it down to:
$csv = Import-Csv c:\tmp\200114.csv | Select-Object #{expression={$_.code}; label='ID NUMBER'} | $filename = "$(Get-Date -f 'yyyy-MM-dd') - $($csv[0].DESCRIPTION).csv" | $csv | Export-Csv $filename -NoTypeInformation
but I just get errors:
Expressions are only allowed as the first element of a pipeline.
At line:1 char:108
+ $csv = Import-Csv c:\tmp\200114.csv | Select-Object #{expression={$_.code}; label='ID NUMBER'} | $filename <<<< = "$
(Get-Date -f 'yyyy-MM-dd') - $($csv[0].DESCRIPTION).csv" | $csv | Export-Csv $filename -NoTypeInformation
+ CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : ExpressionsMustBeFirstInPipeline
Thanks again.

Answer 1

Capture the processed CSV in a variable:
$csv = Import-Csv c:\tmp\200114.csv | Select #{n='ID NUMBER';e={$_.code}},
#{n='DESCRIPTION';e={...}},
...
Construct your filename:
$filename = "$(Get-Date -f 'yyyy-MM-dd') - $($csv[0].DESCRIPTION).csv"
Then export the data:
$csv | Export-Csv $filename -NoTypeInformation