How can I replace a string in multiple files with a value from a list, sequentially in Powershell? - string

Question

Lets say I have a bunch of text files with people's names, that all have this as the content:
number
I want to replace "number" with a value from a CSV or text file, sequentially, and based on the file name. CSV has two columns, name and number:
Joe 5551011000
Gary 5551011001
Clark 5551011002
So I want to find the text file named Joe, and replace the "number" with "5551011000", and the text file named Gary, and replace "number" with "5551011001".
Thank you!
I didn't get too far:
Get-ChildItem "C:\test\*.txt" -Recurse | ForEach-Object -Process {
(Get-Content $_) -Replace 'changeme', 'MyValue' | Set-Content $_
}
This gets me party there, but I don't know how to find a specific file, then replace "number" in that file with the correct value that matches the name.
I also tried a different approach, with manual entry, and it works, but I need it to just be automated:
get-childitem c:\Marriott -recurse -include *.txt |
select -expand fullname |
foreach {
$new = Read-Host 'What is the new value you want for ' $_
(Get-Content $_) -replace 'number',$new |
Set-Content $_
}

Answer 1

I would convert your CSV to a hashtable, then this gets pretty simple.
$ReplaceHT = #{}
Import-Csv c:\path\to\file.csv -Delimiter ' ' -Header 'FileName','Number' | ForEach-Object {$ReplaceHT.add($_.FileName,$_.Number)}
Get-ChildItem c:\Marriott -recurse -include *.txt -PipelineVariable 'File'|Where{$_.name -in $ReplaceHT.Keys} |ForEach-Object{
(Get-Content $File.FullName) -replace 'changeme', $ReplaceHT[$File.Name] | Set-Content $File.FullName
}