Powershell导出到文本文件

Question

I'm working on a script that checks folders in specific directory. For example, I run the script for first time, it generates me a txt file containing folders in the directory.

I need the script to add any new directories that are found to the previously created txt file when the script is run again.

Does anyone have any suggestions how to make that happen?

Here is my code so far:

$LogFolders = Get-ChildItem -Directory mydirectory ;


If (-Not (Test-Path -path "txtfilelocated")) 

 {

Add-Content txtfilelocated -Value $LogFolders 
break;

}else{

$File = Get-Content "txtfilelocatedt"

$File | ForEach-Object {
$_ -match $LogFolders
}

}
$File

Answer 1

something like this?

You can specify what directory to check adding path to get-childitem cmdlet in first line

$a = get-childitem | ? { $_.psiscontainer } | select -expand fullname #for V2.0 and above
$a = get-childitem -Directory | select -expand fullname #for V3.0 and above

if ( test-path .\list.txt )
{    
  compare-object (gc list.txt) ($a) -PassThru | Add-Content .\list.txt
}
else
{    
 $a | set-content .\list.txt    
}