How to concatenate 2 Write-Output on the same line?

Question

I wrote a script that can return you if a software is installed or not.

I would like to give it a bit of colors but I don't know how to concatenate 2 Write-Output on the same line as -NoNewline only works for Write-Host... which in this case I cannot use:

# The function we use to give color

function Positive {
    process { Write-Host $_ -ForegroundColor Green }
    }

function Negative {
    process { Write-Host $_ -ForegroundColor Red }
    }

# Is the software installed?
# '0' = NO, is not installed
# '1' = YES, is installed

$Check = '1'

function Check_Installation($Check){
    if ($Check -eq '0') {return $response =  "No, is not installed" | Negative}
    elseif ($Check -eq '1') {return $response =  "Yes, is installed" | Positive}
    }

$First_Phrase =  "Let's check if the software is installed: "

Write-Output "$First_Phrase", "$response"

Check_Installation($Check)

I know I can concatenate with

[string]::Concat("$First_Phrase", "$response")

but is not working.

If you just want to write something to the screen you should use Write-Host. Especially if you want to have it in another color. — Olaf
– Olaf, Commented Feb 25, 2019 at 0:34
Thank you @Olaf but this is not how it works if you use function as Write-Host will just write in the terminal without respecting the steps — Francesco Mantovani
– Francesco Mantovani, Commented Feb 25, 2019 at 0:43
If you search for powershell write-output colors on Google you will find many examples that shows how this is possible. But they all not apply to my situation because of the function. that's why I asked on StackOverflow — Francesco Mantovani
– Francesco Mantovani, Commented Feb 25, 2019 at 0:55

Owain Esau · Accepted Answer · 2019-02-25 02:01:18Z

2

This works in console only as changing the foreground colour in ISE changes it for every line:

# The function we use to give color

function Set-Output {
    param ($colour, $str1, $str2)

    $t = $host.ui.RawUI.ForegroundColor
    $host.ui.RawUI.ForegroundColor = "$colour"

    $text = "$str1 $str2"

    Write-Output "$text"

    $host.ui.RawUI.ForegroundColor = $t

}

# Is the software installed?
# '0' = NO, is not installed
# '1' = YES, is installed

$Check = '1'

$First_Phrase =  "Let's check if the software is installed: "

Switch ($check) {
    ( 0 ) {Set-Output -colour RED -str1 $First_Phrase -str2 "No, is not installed" }
    ( 1 ) {Set-Output -colour GREEN -str1 $First_Phrase -str2  "Yes, is installed" }
}

Check_Installation($Check)

All that it is doing is concatenating the two strings and changing the foreground colour.

edited Feb 25, 2019 at 2:01

answered Feb 25, 2019 at 1:43

Owain Esau

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4 Comments

Francesco Mantovani Over a year ago

This looks very good. So there is no way to color just Yes, is installed and No, is not installed?

Owain Esau Over a year ago

Unfortunately not that i know of, unless you have them on different lines the colour will be the same for each line. ( stackoverflow.com/questions/3896258/… ) will give you an idea of how Write-Output works. If you must have different colours on the same line you have to use Write-Host with the -nonewline parameter

Owain Esau Over a year ago

What is the reason you cannot use write-host by the way?

Francesco Mantovani Over a year ago

This is the reason that forces me to use Write-Output stackoverflow.com/questions/54344622/…

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