导入Excel，使用PowerShell导出CSV

Question

Due to restrictions I either need to use VB or PowerShell for this task.

I have an Excel that looks like:

ColumA,              ColumB,ColumC,ColumD,ColumE,ColumF
000|Txt,MoreTxt ,    ColumB,ColumC,ColumD,ColumE,ColumF

I read about import_csv -header, but I'm under to successfully do it. I'll post my script below. The export I expect is:

ColumA, ColumB, ColumC, ColumD, ColumE, ColumF
000,    ColumB, ColumC, ColumD, ColumE, ColumF

Only Colum gets modified, and I -only- need the digits from before that pipe. It also has to stay three digits, so 1 becomes 001, etc.

This is the script I modified based on some previous inquiries I saw, and the MS Tutorial.

   $file = import-csv "C:\path\to\my\file\test.csv"
    foreach ($row in $file){
        $tempfile = New-Object psobject -Property @{
            ColumA = $row. 'ListName'.substring(0,2)
            ColumB = $row. 'ColumB'
            ColumC = $row. 'ColumC'
            ColumE = $row. 'ColumE'
            ColumF = $row. 'ColumF'
        }
        $expandfile = @()
        $expandfile += $tempfile | select ColumA, ColumB, ColumC, ColumD,  ColumE, ColumF
    }

PS gives me both errors on not liking everything I have in quotes (Which I thought was the column name, but I guess not. And also a parse error on the entire array. Essentially the entire script.

UPDATE Providing real examples of source.

"Tiam
Name",SiamName,Siam,Ciam,Piam,Liam,Niam,Diam
"002|City, State","City, State - Some text (15092)",1,"3,408",99,"3,408",780,22.89%
"009|City, State","City, State - Some Text (E) (15450)",1,"1,894",81,"1,894",543,28.67%

Answer 1

Edit:

$expandfile = Import-Csv "C:\path\to\my\file\test.csv" | ForEach-Object {
    $_."Tiam`r`nName" = $_."Tiam`r`nName".SubString(0,3)
    $_
}