How can I use an array key in a powershell loop? - powershell

Question

I am using PowerShell to read and loop through a CSV file in order to create a new file for each row of the CSV file. I need to use the header names as part of each new file.
For each row of the CSV, how can I loop through each column and output the key and value for each variable in the output of each new file?
For example, if Master.csv contains
a,b,c
1,2,3
4,5,6
I would like to output a file named file1.txt:
a=1
b=2
c=3
and a file named file2.txt:
a=4
b=5
c=6
Is there an advantage to converting the array into a hash table, and using something like $d.Keys?
I am trying the below, but cannot get the key:
Import-Csv "C:\Master.csv" | %{
$CsvObject = $_
Write-Output "Working with $($CsvObject.a)"
$CsvObject | ForEach-Object {
Write-Output "Key = Value`n"
}
}

Answer 1

this will do the job, it seems. [grin] it uses the hidden .PSObject property to iterate thru the properties of each object.
# fake reading in a CSV file
# in real life, use Import-CSV
$Instuff = #'
a,b,c
1,2,3
4,5,6
'# | ConvertFrom-Csv
$Counter = 1
foreach ($IS_Item in $Instuff)
{
$FileName = "$env:TEMP\HamletHub_File$Counter.txt"
$TextLines = foreach ($Prop in $IS_Item.PSObject.Properties.Name)
{
'{0} = {1}' -f $Prop, $IS_Item.$Prop
}
Set-Content -LiteralPath $FileName -Value $TextLines
$Counter ++
}
HamletHub_File1.txt content ...
a = 1
b = 2
c = 3