Pass multiple parameters to function by pipeline

Question

I'm having trouble passing two parameters via pipeline to a function.

function Test{
[cmdletbinding()]
param(
[parameter(ValueFromPipeline=$true, Mandatory=$true,Position=0)]
[string]$jeden,
[parameter(ValueFromPipeline=$true, Mandatory=$true,Position=1)]
[string]$dwa
)
Process{write-host "$jeden PLUS $dwa"}
}

"one", "two"|Test

What I expected as an outcome was

one PLUS two

but what I got was

one PLUS one
two PLUS two

I'm obviously doing something wrong, since both parameters get used twice. Please advise.

Nawad-sama · Accepted Answer · 2022-12-27 11:07:57Z

2

I got it to work by creating pscustomobject and piping it to function, where ValueFromPipelineByPropertyName property is set to true for both parameters.

function Test{
[cmdletbinding()]
param(
[parameter(ValueFromPipelineByPropertyName=$true, Mandatory=$true,Position=0)]
[string]$jeden,
[parameter(ValueFromPipelineByPropertyName=$true, Mandatory=$true,Position=1)]
[string]$dwa
)
Process{write-host "$jeden PLUS $dwa"}
}

$Params = [pscustomobject]@{
    jeden = “Hello”
    dwa = “There”
}

$Params |Test

OUTPUT:

Hello PLUS There

Variable assigning can be skipped and [pscustomobject] can be piped directly.

edited Dec 27, 2022 at 11:07

answered Dec 27, 2022 at 10:58

Nawad-sama

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Comments

Raziak · Accepted Answer · 2022-12-27 10:05:21Z

1

Have u tried to pass both strings as single object? Seems its ur pipeline is treating dem as 2 obj...

@("one", "two") | Test

EDIT. Try to define test in order to accept array:

function Test {
    [cmdletbinding()]
    param(
        [parameter(ValueFromPipeline=$true, Mandatory=$true,Position=0)]
        [string[]]$strings
    )
    Process {
        write-host "$($strings[0]) PLUS $($strings[1])"
    }
}

edited Dec 27, 2022 at 10:05

answered Dec 27, 2022 at 9:47

Raziak

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3 Comments

Nawad-sama Over a year ago

I tried that and the result is the same

Raziak Over a year ago

maybe you can try to define your Test function to accept an array and then use the pipeline to pass the array of strings. Check my edited comment and try it

Nawad-sama Over a year ago

With the edited code the outcome is different but not what I need one PLUS two PLUS

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