How to delete lines that start with “#” in a CSV file

问题

Every morning I have a report that generates a CSV file that contains names of computers, as well as additional comments throughout the file. Each line that is a comment starts with "#", and comments are scattered throughout the document, not just at the start of the document so I can't just read over the first couple lines.

Is there any way to search through the CSV file and delete lines that start with "#"? Or is there a way to select lines that don't start with "#", and save them to as a new file?

回答1:

Yes, absolutely.

You could read the file, line by line, and simply filter out anything that starts with #:

Get-Content $csvPath |Where-Object {$_ -notlike '#*'} |Set-Content $newCsvPath

回答2:

foreach ($thing in $csv) {
    if ($thing.StartsWith("#")) {
        continue
     } else {
        #insert what you want to do here
     }
}

回答3:

Your duplicate question mentioned that you also want to filter out empty lines. This will do that:

Get-Content "inputfile.csv" |
  Where-Object { $_ -notmatch '(^\s*$)|(^\s*#)' } |
  Set-Content "outputfile.csv"

来源：https://stackoverflow.com/questions/51710093/how-to-delete-lines-that-start-with-in-a-csv-file