How to solve the "Method invocation failed" error in script?

Question

Hello,
I'm trying to modify the script that enumerates all the txt (csv) files on folder and deletes empty columns, but with no luck. The script is working when I execute it on single csv file. But when I put script on loop, it generates errors:
Method invocation failed because [System.Management.Automation.PSCustomObject] does not contain a method named 'split'.
At C:\scripts\populate.ps1:25 char:1
+ $b = $line.split(",")
+ ~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (split:String) [], RuntimeException
    + FullyQualifiedErrorId : MethodNotFound
The script looks the following:
$files = Get-ChildItem C:\scripts\Results\csv\* -include *.txt
#Process files by performing a search and replace
foreach ($infile in $files)
$infilen = 'C:\scripts\Results\csv\'+[io.path]::GetFileName($infile)
$infile = import-csv $infilen
##remove blank coloumns##
$cStore = @() # array to store used column numbers
$rNumber = 0
foreach ($line in $infile)
if ($rNumber -eq 0)
{# ignore header
else
$b = $line.split(",")
$fieldNum = 0
foreach ($field in $b)
if ($field -ne '')
if ($cStore -notcontains $fieldNum) {$cStore += $fieldNum}
$fieldNum += 1
$rNumber +=1
# array $cStore now contains column numbers with values
$cStore = $cStore | sort
foreach ($line in $infile)
$nLine = ""
$c = $line.split(",")
foreach ($ar in $cStore)
$nLine += $c[$ar]+","
# remove trailing ,
$nLine = $nLine.Substring(0, $nLine.Length-1)
$fnFriendly = [io.path]::GetFileNameWithoutExtension($infile)
$result=$fnFriendly+'cl.txt'
Write-Output $nLine >> $result
Also I have found the explanation on this error on this
link but it seems this is not the case.  Can you help to solve this?
Thanks!

Answer 1

You are importing a CSV file which implies that you are creating an object (pscustomobject) and each item in that object is represented by $line. The issue is that this $line has multiple properties (for each column of the CSV) that you need to decide
on which one to split:
$c = $line.propertyname.split(",")
I'm not sure, but it seems that if you are trying to split by a comma, then maybe you are assuming that you did something similar to a
get-content on the file in which the original approach that you have done would work.
Boe Prox
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