ps1 not giving result in dos shell - powershell

Question

My script....
function DirSize {
BEGIN {}
PROCESS
{
$timer = Get-Date -UFormat "%Y%m%d%H%M%S"
$bFile="C:\00mpd\DR\mrv_incr_"+$timer+".txt"
$data = Get-Content "C:\00mpd\DR\vaults.txt"
write-host $data.count total lines read from file
foreach ($line in $data)
{
write-host $line
$a=0
foreach ($file in (Get-ChildItem $line -recurse -Force| where-object {!($_.psiscontainer)} | where { $_.LastWriteTime -ge ((get-date).AddHours(-1))} ))
{
$a+=$file.length/1GB
}
Write-Output "$line :: $a GB"
"$line :: $a GB"| Out-File $bFile -append
}
}
END {}
} # end function Get-DirSize
vaults.txt contents name of the various folders....
d:\Milind_laptop_backup\DDrive\Milind_pst\
d:\Milind_laptop_backup\DDrive\Office\
d:\Milind_laptop_backup\DDrive\personal\
d:\Milind_laptop_backup\DDrive\ToMilind\
Above ps1 give proper result when running in powershell window. But when I'm running same in dos shell, it's not giving any result.
Powershell commands
PS C:\> . "c:\00mpd\dr\dirsize.ps1"
PS C:\> DirSize
But when I tried in Dos shell, no result is coming out.
C:\00mpd\DR>powershell -File "c:\00mpd\dr\DirSize.ps1"

Answer 1

You are running the script as function
This is OK when you are executing it from Inside PowerShell, The Function DirSize Load it and DirSize to Execute it. but when run it from .ps1 file it just loads the function but not executing it.
To Solve this:
Method 1:
Remove the function DirSize { and the last line } # end function Get-DirSize
Method 2:
Dot Source the .ps1 as a command to load the function then run it after
powershell -Command ". c:\00mpd\dr\DirSize.ps1; DirSize"
As Mathias R. Jessen Suggested

Answer 2

As others have said if you remove
function DirSize{ }
and dot source your script, it will solve one issue.
I would personally then change Write-Output to Write-Host. It should give the result that you are looking for.