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When I use Write-Host within a Foreach-Object, I get an unnecessary space in the output.
write-host "http://contoso.com/personal/"$_.ADUserName
Output:
http://contoso.com/personal/ john.doe
How can I remove the space before john? Trim does not work because there is no space in $_.ADUserName
520
It's always been recommended to avoid using Write-Host because it outputs only to the console and not to any of the standard output streams. As of PowerShell 5.0, Write-Host is just a wrapper for Write-Information and thus outputs to the standard output streams similar to the other Write-* cmdlets.
Write-Host sends the objects to the host. It does not return any objects. However, the host displays the objects that Write-Host sends to it.
In a nutshell, Write-Host writes to the console itself. Think of it as a MsgBox in VBScript. Write-Output , on the other hand, writes to the pipeline, so the next command can accept it as its input.
Write-Output sends objects to the primary pipeline, also known as the "output stream" or the "success pipeline." To send error objects to the error pipeline, use Write-Error . This cmdlet is typically used in scripts to display strings and other objects on the console.
This is happening because Write-Host is considering your constant string and your object to be two separate parameters -- you aren't actually joining the strings together the way you're calling it. Instead of calling it this way, actually concatenate the strings:
write-host "http://contoso.com/personal/$($_.ADUserName)"
or
write-host ("http://contoso.com/personal/" + $_.ADUserName)
or
write-host ("http://contoso.com/personal/{0}" -f $_.ADUserName)
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