Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

Can a script determine where "show-output" is going?

Posted on 2014-03-19
2
274 Views
Last Modified: 2014-03-19
Hi

I am running a script, sometimes using "out-file" to catch messages, sometimes not.
In my script is a "write-host" cmdlt so I can see the messages and then I do a write-output cmdlt to ensure it is also in the out-file.

If I have not used an "out-file", I get the information twice on the screen.
To avoid this, can I detect if a running script is using  "out-file"?
Then I could supress "write-output" when there is no out-file.
Thanks.
0
Comment
Question by:dreadman2k
2 Comments
 
LVL 40

Accepted Solution

by:
footech earned 500 total points
ID: 39941466
Why not just use Write-Output and skip the Write-Host commands?  Then if you if you have the Out-File it will go to a file, and if not then it will display on screen.  Then you're just choosing which you want.

Another option is to create your script using a parameter that you set as desired for whether you want to display output or not.  For example, setting a variable like $display=$false, and checking throughout the script if $display -eq $false then skipping the Write-Host commands.

Third option would be instead of piping to Out-File, pipe to Out-Null instead.

In short, I haven't heard of nor can I think of any way to detect the use of Out-File (and what about any other cmdlets that produce files like Set-Content, Export-CSV, etc.).  A script is processed in a synchronous/serial (i.e. one thing after another) fashion.  A pipeline isn't going to know what is at the end of it until it gets to it.
0
 
LVL 2

Author Closing Comment

by:dreadman2k
ID: 39941548
Thanks footech,

I will go with the parameter & send write-output to out-null if no parameter is specified.
Your last paragraph makes sense - I guess I was approaching this from the wrong direction.
Cheers!
0

Featured Post

Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Microsoft Windows Server Update Service (WSUS) is free for everyone, but it lacks of some desirable features like send an e-mail to the administrator with the status of all computers on the WSUS server. This article is based on my PowerShell script …
The following article is intended as a guide to using PowerShell as a more versatile and reliable form of application detection in SCCM.
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…
In a recent question (https://www.experts-exchange.com/questions/29004105/Run-AutoHotkey-script-directly-from-Notepad.html) here at Experts Exchange, a member asked how to run an AutoHotkey script (.AHK) directly from Notepad++ (aka NPP). This video…

791 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question