Count items in a folder with PowerShell

问题

I\'m trying to write a very simple PowerShell script to give me the total number of items (both files and folders) in a given folder (c:\\MyFolder). Here\'s what I\'ve done:

Write-Host ( Get-ChildItem c:\\MyFolder ).Count;

The problem is, that if I have 1 or 0 items, the command does not work---it returns nothing.

Any ideas?

回答1:

You should use Measure-Object to count things. In this case it would look like:

Write-Host ( Get-ChildItem c:\MyFolder | Measure-Object ).Count;

or if that's too long

Write-Host ( dir c:\MyFolder | mo).Count;

and in PowerShell 4.0 use the measure alias instead of mo

Write-Host (dir c:\MyFolder | measure).Count;

回答2:

I finally found this link:

https://blogs.perficient.com/microsoft/2011/06/powershell-count-property-returns-nothing/

Well, it turns out that this is a quirk caused precisely because there was only one file in the directory. Some searching revealed that in this case, PowerShell returns a scalar object instead of an array. This object doesn’t have a count property, so there isn’t anything to retrieve.

The solution -- force PowerShell to return an array with the @ symbol:

Write-Host @( Get-ChildItem c:\MyFolder ).Count;

回答3:

If you need to speed up the process (for example counting 30k or more files) then I would go with something like this..

$filepath = "c:\MyFolder"
$filetype = "*.txt"
$file_count = [System.IO.Directory]::GetFiles("$filepath", "$filetype").Count

回答4:

Only Files

Get-ChildItem D:\ -Recurse -File | Measure-Object | %{$_.Count}

Only Folders

Get-ChildItem D:\ -Recurse -Directory | Measure-Object | %{$_.Count}

Both

Get-ChildItem D:\ -Recurse | Measure-Object | %{$_.Count}

回答5:

Recursively count files in directories in PowerShell 2.0

ls -rec | ? {$_.mode -match 'd'} | select FullName,  @{N='Count';E={(ls $_.FullName | measure).Count}}

回答6:

In powershell you can to use severals commands, for looking for this commands digit: Get-Alias;

So the cammands the can to use are:

write-host (ls MydirectoryName).Count

write-host (dir MydirectoryName).Count

write-host (Get-ChildrenItem MydirectoryName).Count

回答7:

To count the number of a specific filetype in a folder. The example is to count mp3 files on F: drive.

( Get-ChildItme F: -Filter *.mp3 - Recurse | measure ).Count

Tested in 6.2.3, but should work >4.

来源：https://stackoverflow.com/questions/14714284/count-items-in-a-folder-with-powershell

标签

powershell-2.0