Set powershell variable in ps1 script by a paramater

Question

How to set Powershell variable into ps1 script before the execution of the script

example:

application execution path: powershell.exe -ExecutionPolicy Bypass -File "C:/script.ps1"

paramater: $WhichSite= "StackOverflow"

ps1 contains: curl -UseBasicParsing "http://www.$WhichSite.com"

I tried the example above to set the $WhichSite = "stackoverflow"

But it did not work

result expected of executing powershell.exe -ExecutionPolicy Bypass -File "C:/script.ps1": curl -UseBasicParsing "http://www.stackoverflow.com"

tomarbs · Accepted Answer · 2023-02-16 02:22:02Z

1

If I understand your question correctly, the best thing would be to pass a parameter to the script and then call the curl function from within. You might consider something like this inside of script.ps1:

    [CmdletBinding()]
    param (
        [Parameter(Mandatory=$true)]
        [System.String]
        $WhichSite
    )
    
    Invoke-WebRequest -UseBasicParsing "Http://$WhichSite.com"

Then, to run the script from a PowerShell window, you can do:

./script.ps1 -WhichSite "stackoverflow"

You can set the execution policy for PowerShell for the current session by running:

Set-ExecutionPolicy -ExecutionPolicy Bypass -Scope Process

So that you don't have to add it in front of your script execution everytime time.

edited Feb 16, 2023 at 2:22

answered Feb 16, 2023 at 1:44

tomarbs

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6 Comments

Name F Over a year ago

Thanks for the reply and the execution policy tip, Will it work also for numeric value and should I execute all together or separate the app execution path than the parameter C:\script.ps1 -WhichSite "stackoverflow" or app exec path: C:\script.ps1 parameter: -WhichSite "stackoverflow" cause I tried both did not work maybe cause the the value is number that's why it did not work

tomarbs Over a year ago

Apologies, I mistyped the execution string - if you change directory to be in the C:\ directory, the execution is ./script.ps1 -WhichSite "stackoverflow" It should be executed as I just typed it. Numbers should work as well, they'll just be converted to strings, not integers.

tomarbs Over a year ago

On second thought, you are probably better off using Invoke-WebRequest, I've updated my answer to reflect that. Eliminates potential PATH issues with curl.exe

Name F Over a year ago

Thanks for the help I tried it but still did not work, note that the parameter is numeric. the Invoke-WebRequest will not work since Internet explorer is disabled by GPO.

tomarbs Over a year ago

If you pass the parameter in quotes, such as "123", then it will be interpreted as a string. Invoke-WebRequest does not have a dependency on IE, I'm running the above snippet on a machine without IE installed it is appropriately returning the request data. How are you executing this script?

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