Powershell query works in prompt, but not in script

Question

I am trying to make a script that takes input of a hostname and tells me the current logged on user. It works when I run the command one by one on the powershell prompt (as an admin), but doesn't produce the expected output when I run the actual script itself.

Here is the relevant code:

$Row.Hostname = $Hostname
$getwmiobject = Get-WmiObject -class Win32_computersystem -computername $Hostname
$Username = $Getwmiobject.username

    if($UserName -eq $NULL) {
    $Row.Username = "No Current Logged on User"
    }
        else {$Row.Username = $Username
    }

$csvfile += $Row

$csvfile |sort-object Hostname | Export-Csv "foo.csv

When ran in the command line, I get the correct user. When ran as a script, I get "No Current logged on user". I have no clue why this is happening.

EDIT: I suppose it's important to mention that I have the output writing out to a file, made the changes in the code above.

Answer 1

Check whatever input you have for the $Hostname variable for extra characters, such as a newline `n. When you type it out, it may not give you an error and work because it doesn't have to process things like that.