customize a CSV-file in PowerShell and export it - powershell

Question

We are supposed to edit a CSV-file in PowerShell and export the file afterwards
The CSV-file contains:
"ID";"date";"number"
"YYY-12345";"24.01.2023";"123456910"
Now we should add "-001" after the ID-block..but for the whole column
thats the code for now:
$folder_csv = 'C:\Abschluss'
$folder_fileout = 'C:\Abschluss\Ausgabe'
$files = Get-ChildItem $folder_csv -File -Filter *.csv
foreach ($file in $files) {
$data = Import-csv $($file.Fullname) -Delimiter ";"
foreach($dataset in $data) {
$data.ID + "-001"
$data | export-csv "$folder_fileout\test.txt" -Delimiter ";" -NoType -Encoding UTF8 -append
}
}
it shows the results in the console of PowerShell but not in the created .txt-file.

Answer 1

You're pretty close with your code, the main issue is that you're currently doing $data.ID + "-001" and $data is actually the complete array of objects, you want to refer to $dataset instead (the object being enumerated). Aside from that, it seems you're looking to merge all Csvs into one, hence you could leverage the PowerShell pipeline using an outer ForEach-Object loop instead of foreach:
$folder_csv = 'C:\Abschluss'
$folder_fileout = 'C:\Abschluss\Ausgabe'
Get-ChildItem $folder_csv -File -Filter *.csv | ForEach-Object {
foreach($line in $_ | Import-csv -Delimiter ';') {
# update the Id property of this object
$line.Id = $line.Id + '-001'
# output the updated object
$line
}
} | Export-Csv "$folder_fileout\test.txt" -Delimiter ";" -NoTypeInformation -Encoding UTF8