CODEWITHSUNDEEP
windowspowershell
BlacK
BlacK

Reputation: 351

How to compare a folder size in Powershell

I have to apply a command IF the folder size is greater or equal to 600MB.

I tried something like this 

$folders = Get-ChildItem d:\home -exclude *.*
function Get-Size
{
 param([string]$pth)
 "{0:n2}" -f ((gci -path $pth -recurse | measure-object -property length -sum).sum /1mb)
}


ForEach ($subFolder in $folders){

echo $subFolder | select-object fullname
$size = Get-Size $subFolder
echo $size

    if ($size -gt "600") { echo "Not ok." }
    else { echo "OK template." }

}

It doesn't work. It writes the right size of the folder but the IF statement is not respected. How do I do?

Upvotes: 0

Views: 3835

Answers (2)

Ansgar Wiechers
Ansgar Wiechers

Reputation: 200203

The simplest way is to use the FileSystemObject COM object:

function Get-FolderSize($path) {
    (New-Object -ComObject 'Scripting.FileSystemObject').GetFolder($path).Size
}

I'd recommend against doing formatting in a Get-Size function, though. It's usually better to have the function return the raw size, and do calculations and formatting when you actually display the value.

Use it like this:

Get-ChildItem 'D:\home' | Where-Object {
    $_.PSIsContainer -and
    Get-FolderSize $_.FullName -gt 600MB
}

or like this:

Get-ChildItem 'D:\home' | Where-Object {
    $_.PSIsContainer
} | ForEach-Object {
    if (Get-FolderSize $_.FullName -gt 600MB) {
        'Not OK.'
    } else {
        'OK template.'
    }
}

On PowerShell v3 and newer you can use Get-ChildItem -Directory instead of Get-ChildItem | Where-Object { $_.PSIsContainer }.

Upvotes: 2

SavindraSingh
SavindraSingh

Reputation: 961

When you are comparing using $size -gt "600" the value is considered as string. Hence not getting right results.

Try comparison using integers.

Upvotes: 0

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