How do I write a PowerShell script that accepts pipeline input?

Question

I am trying to write a PowerShell script that can get pipeline input (and is expected to do so), but trying something like

ForEach-Object {    # do something } 

doesn't actually work when using the script from the commandline as follows:

1..20 | .\test.ps1 

Is there a way?

Note: I know about functions and filters. This is not what I am looking for.

Answer 1

In v2 you can also accept pipeline input (by propertyName or byValue), add parameter aliases etc:

function Get-File{     param(       [Parameter(         Position=0,          Mandatory=$true,          ValueFromPipeline=$true,         ValueFromPipelineByPropertyName=$true)     ]     [Alias('FullName')]     [String[]]$FilePath     )       process {        foreach($path in $FilePath)        {            Write-Host "file path is: $path"        }     } }   # test ValueFromPipelineByPropertyName  dir | Get-File  # test ValueFromPipeline (byValue)   "D:\scripts\s1.txt","D:\scripts\s2.txt" | Get-File   - or -  dir *.txt | foreach {$_.fullname} | Get-File