Powershell get extension files within a given path

Question

The main idea of this post is that, given a path to folder or disk. Then powershell will search all file and folder inside this path and list all the extension file current stored in this path (docx, xlsx, jpg,...)

The final results will be stored in csv file.

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– Jeff Zeitlin, Commented Feb 28, 2019 at 14:59
Hi, welcome Stackoverflow, we are willing to help you, but as Jeff mentioned, don't rely we will make your homework, that's not how SO works :) — xxxvodnikxxx
– xxxvodnikxxx, Commented Feb 28, 2019 at 15:11

Sergio Tanaka · Accepted Answer · 2019-02-28 22:02:23Z

1

I've made a little fix in the svanzundert solution

$Folder = "C:\Temp\"
Get-ChildItem $Folder | Select Extension -Unique | Where-Object{$_.Extension -ne ""} | Export-Csv -Path C:\Temp\YourCSV.csv -NoTypeInformation

You just have to use -Unique parameter in the Select-Object

answered Feb 28, 2019 at 22:02

Sergio Tanaka

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1 Comment

ABCD Over a year ago

Oh thanks. Now it doesn't repeat same extension anymore!

svanzundert · Accepted Answer · 2019-02-28 15:18:26Z

1

I think you want something like this, but could be I misunderstood your question.

$Folder = "C:\Temp\"
Get-ChildItem $Folder | Select Extension | Where-Object{$_.Extension -ne ""} | Export-Csv -Path C:\Temp\YourCSV.csv -NoTypeInformation

answered Feb 28, 2019 at 15:18

svanzundert

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2 Comments

ABCD Over a year ago

Thanks! That's exactly what I want! But it still have a small problem is that if I have 2 pdf file, it will list 2 extension pdf and pdf in CSV file?

xxxvodnikxxx Over a year ago

There should be something like Get-Unique @ABCD check docs

xxxvodnikxxx · Accepted Answer · 2019-02-28 15:37:22Z

For sure there will be better ways, like use filter to get from childs files onlz but zou can do something like follows:

#will load directory content
$files = Get-ChildItem "C:\Users\fooo\Documents\" 

#empty array for extensions preparation
$extensions = New-Object System.Collections.ArrayList($null)

#iterate over items= files and directories
for ($i=0; $i -lt $files.Count; $i++) {
    #print all (once by one of course)
    #Write-Host $files[$i].FullName
    #print extension only
    #Write-Host $files[$i].Extension

    #store extensions by unique, if its a file
    if( ($files[$i].GetType().Name -eq "FileInfo" ) -and !$extensions.Contains($files[$i].Extension) ){
        $extensions.Add($files[$i].Extension)
    }
}

Write-Host $extensions

my output:

.gitattributes .gitignore .mailmap .yml .cmd .fsx .sh .md .dependencies .lock .sln .DotSettings

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