Remove only commas in quotations from a CSV in PowerShell

Question

My end goal is to convert/export data in some CSV files into an Excel workbook with multiple sheets using PowerShell. I have it about 90% working but I cannot seem to remove some commas in the contents of the CSV files.

I've tried some regular expressions but they didn't work.

My luck so far is that it either removes nothing or it removes every single comma in the CSV and then breaks the export to Excel by putting everything into a single column or it removes everything in the cell that has the comma in it.

Here's an example of some of the content of the CSV that I am trying to work with.

Software Name     Vendor

Software A        Vendor A
Software B        Vendor B
Software C        Vendor, C
Software D        Vendor D
Software E        Vendor, E

Here is a snippet of code from a script that I am putting together.

$Excel = new-object -comobject Excel.Application
$Excel.SheetsInNewWorkbook = $GetCSV.Count
$AddWorkBook = $Excel.Workbooks.Add()
$NewWorkSheet=1

foreach ($CSV in $GetCSV) {
    (Get-Content $CSV | Select-Object -Skip 1) | Set-Content $CSV
    $Row=1
    $Column=1
    $WorkSheet = $AddWorkBook.WorkSheets.Item($NewWorkSheet)
    $Name = $CSV.Name -replace ('.CSV','')
    $WorkSheet.Name = $Name
    $GetFile = (Get-Content $CSV)

    foreach($Line in $GetFile) {
        $LineContens=$Line -split ‘,(?!\s*\w+”)’
        foreach($Cell in $LineContens) {
            $WorkSheet.Cells.Item($Row,$Column) = $Cell
            $Column++
        }
        $Column=1
        $Row++
    }
    $NewWorkSheet++
}
$AddWorkBook.SaveAs($WorkBookName)

Answer 1

Description

,(?!(?<=",)")

Replace With: nothing

This regular expression will do the following:

• find all commas which are not separating quote delimited value strings
• assumes all values are contained inside quotes

Example

Live Demo

https://regex101.com/r/uY6iG1/2

Sample text

"Software Name","Vendor"
"Software A","Vendor A"
"Software B","Vendor B"
"Software C","Vendor, C"
"Software D,","Vendor D"
"Soft,ware E","Vendor, E"

After Replacement

"Software Name","Vendor"
"Software A","Vendor A"
"Software B","Vendor B"
"Software C","Vendor C"
"Software D","Vendor D"
"Software E","Vendor E"

Explanation

NODE                     EXPLANATION
----------------------------------------------------------------------
  ,                        ','
----------------------------------------------------------------------
  (?!                      look ahead to see if there is not:
----------------------------------------------------------------------
    (?<=                     look behind to see if there is:
----------------------------------------------------------------------
      ",                       '",'
----------------------------------------------------------------------
    )                        end of look-behind
----------------------------------------------------------------------
    "                        '"'
----------------------------------------------------------------------
  )                        end of look-ahead
----------------------------------------------------------------------