无法使用Powershell合并所有csv文件

Question

I would like to combine all the csv files in my local folder but it shows empty results. I am trying to take the header of the first file and skip all the headers in the rest of the files in the folder and join them.

get-childItem "C:\Users\*.csv" | foreach {[System.IO.File]::AppendAllText
 ("C:\Users\finalCSV.csv", [System.IO.File]::ReadAllText($_.FullName))}

$getFirstLine = $true

get-childItem "C:\Users\*.csv" | foreach {
    $filePath = $_

    $lines =  $lines = Get-Content $filePath  
    $linesToWrite = switch($getFirstLine) {
           $true  {$lines}
           $false {$lines | Select -Skip 1}

    }

    $getFirstLine = $false
    Add-Content "C:\Users\finalCSV.csv" $linesToWrite
    }

My end result is that when I open finalCSV.csv it shows no results.

Answer 1

I think you are trying to overwork your solution. Just use Import-Csv and append to an array. Something like this:

$a = @(); ls *.csv | % {$a += (Import-Csv $_.FullName)}; $a

Works even if the columns are in a different order.