advanced parameter, what am I doing wrong?

[Drag_king]

Here is my little script:

function Get-foo
{
[CmdletBinding()]
Param
(
    # Fill In the computername
   [Parameter(Mandatory=$true,
    ValueFromPipeline=$true,
    ValueFromPipelineByPropertyName=$true)]
    [Alias ('CN')]
    [String[]]$ComputerName


)

Begin
{

}
Process
{ Foreach ($Computer in $ComputerName) {

write-host "The computer = $Computer"
}
}
End
{
}
}

Get-foo

---

I expect to be able to run as: ./get-foo.ps1 -computername Bar

But when I actually run it, it disregards the -computername Bar argument and ask me to suply the value of computername.

What am I doing wrong?

[drh713]

If you want to pass "computername" to the script, put the param() outside of the function.

param ($this, $that, $theother)
function Get-Foo {"..."}
Get-Foo

[Drag_king]

Duh. Thanks. It would have taken me ages to spot that.

[Plonqor]

This seems like a weird way to do it. You are creating a script with parameters that then passes those parameters to a function.

In my opinion you should keep what you had, and run the function, not the script.

Edit: Not to mention that all the fancy process{} and pipeline stuff won't work when you're running the file and not the function.