PowerShell script to read excel and write into text file - powershell

Question

I am trying to write a script in power shell to read the first column value in excel, find the value in text file and replace that value with value in second column of the excel file.I am new to the power shell. Please help. Below is the code:
$excel = Import-Csv -Path C:\Users\abc\Desktop\newnbc.csv
foreach ($ex in $excel)
{
$name = $ex.first
$match = Get-Content -Path 'C:\Users\abc\Desktop\all.txt'
foreach ($ma in $match)
{
if ($match | %{$_ -replace $ex.first,$ex.last})
{
((Get-Content -Path C:\Users\abc\Desktop\all.txt -Raw) -replace $name,$ex.last) | Set-Content -Path C:\Users\abc\Desktop\all.txt
}
}
}

Answer 1

Judging by the info from your comment, it looks like the input CSV is a space-delimited file, something like this:
first last
i3-chq-nbc-dt-comcleanup-cmd i3-chq-nbc-dt-d-com-cleanup
Of course, if the delimiter character is something other than a space, change the value for the -Delimiter parameter.
$fileName = 'C:\Users\abc\Desktop\all.txt'
# get the original content of the text file BEFORE the loop
$content = Get-Content -Path $fileName -Raw
# then, import the csv with the replacement strings and start replacing the content
Import-Csv -Path 'C:\Users\abc\Desktop\newnbc.csv' -Delimiter ' ' | ForEach-Object {
$content = $content -replace $_.first, $_.last
}
# finally, save the updated content to file
$content | Set-Content -Path $fileName