Windows PowerShell read lines until no lines left - powershell

Question

I have a powershell that is downloading some XML data over TCP. I need to have all the data written to a file. Each line of the response needs to be written to a new line in the file. The code below only gets the first line. Ignore the extra readline's because the first few lines are garbage data I don't need. How can I continue to write each line of the response until there are none left? Couldn't find anything else on this.
$server = "192.168.1.173"
$port = "45678"
$password = "password"
while (1) {
$tcpConnection = New-Object System.Net.Sockets.TcpClient($server, $port)
$tcpStream = $tcpConnection.GetStream()
$reader = New-Object System.IO.StreamReader($tcpStream)
$writer = New-Object System.IO.StreamWriter($tcpStream)
$writer.AutoFlush = $true
if ($tcpConnection.Connected) {
$writer.Write("<StageDisplayLogin>");
$writer.Write($password);
$writer.WriteLine("</StageDisplayLogin>");
$ProPresenterData = $reader.ReadLine()
$ProPresenterData = $reader.ReadLine()
$ProPresenterData = $reader.ReadLine()
$ProPresenterData | Out-File -Encoding "UTF8" ProPresenter.xml
Start-Sleep -m 200
while ($tcpStream.DataAvailable) {
$ProPresenterData = $reader.ReadLine()
Add-content -Path ProPresenter.xml -Value "$ProPresenterData"
}
}
$reader.Close()
$writer.Close()
$tcpConnection.Close()
"Wrote file ProPresenter.xml"
$ProPresenterData
Start-Sleep -m 500
}

Answer 1

I can only partially answer your problem. The reason why you only get one line is because of your while loop. There is no trigger for it to go back to the beginning and so it does your loop just one time.
With a foreach you can loop through all the lines in your file:
$file = get-content your.xml
foreach($line in $file){
$line # this would print each line , one after the other.
}
Alternativly you can use a for-loop if you can determine the length of the file in advance.
Having said that, is it an option for you to first fully download the file and then write it into a different file? Or, is it a file that is being constantly renewed with lines added on a certain interval?