Powershell - IO.Directory - Find file types in all subdirectories

Question

I ran across this code in another post that almost does what I need, but can\'t figure out how to modify it to look for specific file types, i.e. *.bak, .txt, etc. I\'m

Answer 1

This will loop through each extension searching for all files in the root and sub-directories. Ensure you have the correct privileges on all the directories especially when you're running from C:\ as the root.

$Extensions = @(".bak",".csv",".txt")

Foreach ( $Extension in $Extensions )
{
   [System.IO.Directory]::EnumerateFiles("C:\","*$Extension","AllDirectories")
}

This method will only work with Powershell running .Net 4.0 or higher. To check and update the version of .Net:

$PSVersionTable

Name                           Value
----                           -----
CLRVersion                     2.0.50727.4971
BuildVersion                   6.1.7600.16385
PSVersion                      2.0
WSManStackVersion              2.0
PSCompatibleVersions           {1.0, 2.0}
SerializationVersion           1.1.0.1
PSRemotingProtocolVersion      2.1

The CLRVersion value is the .net version.

Update the config file as follows:

$Config = @"
<?xml version="1.0"?>
<configuration>
    <startup useLegacyV2RuntimeActivationPolicy="true">
        <supportedRuntime version="v4.0.30319"/>
        <supportedRuntime version="v2.0.50727"/>
    </startup>
</configuration>
"@

$Config > $PSHOME\Powershell.exe.config

Restart the Powershell session and verify the CLRVersion value in the $PSVersionTable variable.

Answer 2

This worked after creating a config file to use the .NET 4.0 Framework:

try{
    $path = "\\$Server\$($drive.replace(':','$'))"
    foreach ($filepath in [System.IO.Directory]::EnumerateFiles($path,"*.bak","AllDirectories"))
       {
          $file = New-Object System.IO.FileInfo($filepath)
          write-host $file
          # insert file into database table
       }
  }
catch [UnauthorizedAccessException]
  {
     $exception = $_.Exception.Message #I don't need to write/insert exception
  }

Answer 3

Here's a simple PowerShell script to move many files from a directory into a structured directory by year, month and day. This is very fast, I had over 500K files.

$listofFiles =   [System.IO.Directory]::EnumerateFiles("D:\LotsOfFiles","*.*","TopDirectoryOnly")

$listofFiles |% {
   $file = New-Object System.IO.FileInfo($_)    
   $date = Get-Date ($file.CreationTime)
   $filepath = ("{0}\{1:00}\{2:00}-{3}\{4:00}\" -f "D:\LotsOfFiles", $date.year, 
   $date.month, $date.toString("MMM"), $date.day)
   Write-Output ("Move: {0} to {1}" -f $file.Fullname, $filepath)

   if (! (Test-Path $filepath)) {       
      new-item -type Directory -path $filepath      
   }

   move-item $file $filepath
}   

This probably can be improved but it works.