Redirect the output of a PowerShell script to a file using command prompt

Question

How to redirect the output of a PowerShell 5.0 script to a file using cmd in Windows 10? I tried the following:

powershell ".\myscript.ps1 | Out-File outfile.txt"

and:

powershell .\myscript.ps1 > outfile.txt

to no avail. The outfile.txt is created but remains empty. The command prompt window is run with Administrator privileges.

In a script I use:

Write-Host $MyVar
Write-Host $SomeOtherVar

to output the values to a screen.

I'm not an expert, but isn't there the option -Command missing? — aschipfl
– aschipfl, Commented Jul 11, 2019 at 9:29
@I.TDelinquent Some internal info. It works as expected when run as-is and displays the output in the powershell console as expected. I would like to redirect this output to a file using cmd. — Ron
– Ron, Commented Jul 11, 2019 at 9:32
@Ron Does myscript.ps1 make use of Write-Host? That won't be redirected in any case — Mathias R. Jessen
– Mathias R. Jessen, Commented Jul 11, 2019 at 9:44

iRon · Accepted Answer · 2019-07-11 15:53:30Z

3

Use the specific PowerShell redirection operators:
_{(they appear to work at the (cmd) command prompt as wel)}

Redirect the success stream (1>):

powershell .\myscript.ps1 1> outfile.txt

Redirect all streams (*>):

powershell .\myscript.ps1 *> outfile.txt

edited Jul 11, 2019 at 15:53

answered Jul 11, 2019 at 11:12

iRon

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Comments

Mathias R. Jessen · Accepted Answer · 2019-07-11 09:52:09Z

1

In a script I use:
Write-Host $MyVar
Write-Host $SomeOtherVar
to output the values to a screen.

Yeah, that's your problem right there! Write-Host writes the information straight to the screen buffer of the host application, so the standard output stream will never actually see anything.

Change your Write-Host statements to Write-Output (or just remove them):

Write-Output $MyVar
Write-Output $SomeOtherVar
# or simply
$MyVar
$SomeOtherVar

answered Jul 11, 2019 at 9:52

Mathias R. Jessen

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