Powershell -replace not replacing content

Question

I am trying to replace a line in a text file. Here is my text file and Powershell script

Text File

String^ m5 = ss.FileMD5(a, salt);
    if (m5 != "e11621cc4370a5203423cc1d1ee8c2a7") {
        return 6;       //mismatch
    }

Powershell Script

$fl = "G:\tmp\test\test.txt"
$find = "m5 !="
$repl = 'if (m5 != "aaaaaaaa") {'
$content = (Get-Content $fl)

$line = $content | Select-String $find | Select-Object -ExpandProperty Line
if ($line -eq $null) {
  "Match Not Found"
  exit
} else {
  $content = $content | ForEach-Object { $_ -replace $line, $repl }
  $content  # print replaced content
}

It is always printing old content without replacement.

What the wrong i am doing in this script ?

Daniel · Accepted Answer · 2021-06-07 05:50:11Z

4

When trying the replace your $line variable if (m5 != "e11621cc4370a5203423cc1d1ee8c2a7") { contains special regex characters that need to be escaped.

Change

$content = $content | ForEach-Object { $_ -replace $line, $repl }

to

$content = $content | ForEach-Object { $_ -replace [regex]::Escape($line), $repl }

answered Jun 7, 2021 at 5:50

Daniel

5,1422 gold badges9 silver badges25 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Drew Over a year ago

Alternatively you can use $content = ($content).replace($line,$repl) which treats it as plain text and not regex. String.replace() is a method where -replace is an operator

SamTech Over a year ago

@Drew ($content).replace($line,$repl) also working fine. I will remember it.

Collectives™ on Stack Overflow

Powershell -replace not replacing content

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related