How can I pass an argument to a PowerShell script

Question

There s a PowerShell script named itunesForward ps1 that makes iTunes fast forward 30 seconds   iTunes   New-Object -ComObject iTunes Application  if   iTunes playerstate -eq 1       iTunes PlayerPosition    iTunes PlayerPosition   30    It is executed with a prompt line command  powershell exe itunesForward ps1  Is it possible to pass an argument from the command line and have it applied in the script instead of the hardcoded 30 seconds value

User · Answer

Create a PowerShell script with the following code in the file.

param([string]$path)
Get-ChildItem $path | Where-Object {$_.LinkType -eq 'SymbolicLink'} | select name, target

This creates a script with a path parameter. It will list all symbolic links within the path provided as well as the specified target of the symbolic link.

User · Answer

You can also define a variable directly in the PowerShell command line and then execute the script  The variable will be defined there  too  This helped me in a case where I couldn t modify a signed script   Example    PS C  temp gt   stepsize   30  PS C  temp gt    itunesForward ps1   with iTunesForward ps1 being   iTunes   New-Object -ComObject iTunes Application  if   iTunes playerstate -eq 1       iTunes PlayerPosition    iTunes PlayerPosition    stepsize

User · Answer

Call the script from a batch file    bat  or CMD PowerShell Core pwsh exe -NoLogo -ExecutionPolicy Bypass -Command  quot   Script ps1 -Param1 Hello -Param2 World quot   pwsh exe -NoLogo -ExecutionPolicy Bypass -Command  quot path-to-script Script ps1 -Param1 Hello -Param2 World quot   pwsh exe -NoLogo -ExecutionPolicy Bypass -Command  quot   Script ps1 Hello -Param2 World quot   pwsh exe -NoLogo -ExecutionPolicy Bypass -Command  quot   Script ps1 Hello World quot   pwsh exe -NoLogo -ExecutionPolicy Bypass -Command  quot   Script ps1 -Param2 World Hello quot   PowerShell powershell exe -NoLogo -ExecutionPolicy Bypass -Command  quot   Script ps1 -Param1 Hello -Param2 World quot   powershell exe -NoLogo -ExecutionPolicy Bypass -Command  quot path-to-script Script ps1 -Param1 Hello -Param2 World quot   powershell exe -NoLogo -ExecutionPolicy Bypass -Command  quot   Script ps1 Hello -Param2 World quot   powershell exe -NoLogo -ExecutionPolicy Bypass -Command  quot   Script ps1 Hello World quot   powershell exe -NoLogo -ExecutionPolicy Bypass -Command  quot   Script ps1 -Param2 World Hello quot    Call from PowerShell PowerShell Core or Windows PowerShell  amp  path-to-script Script ps1 -Param1 Hello -Param2 World  amp    Script ps1 -Param1 Hello -Param2 World   Script ps1 - Script Code param       Parameter Mandatory  True  Position 0  ValueFromPipeline  false        System String       Param1        Parameter Mandatory  True  Position 1  ValueFromPipeline  false        System String       Param2    Write-Host  Param1 Write-Host  Param2

User · Answer

Tested as working   Must be the first statement in your script  not coutning comments  param  Int32  step 30     iTunes   New-Object -ComObject iTunes Application  if   iTunes playerstate -eq 1       iTunes PlayerPosition    iTunes PlayerPosition    step    Call it with powershell exe -file itunesForward ps1 -step 15  Multiple parameters syntax  comments are optional  but allowed    lt       Script description       Some notes    gt  param         height of largest column without top bar      int  h   4000             name of the output image      string  image    out png

User · Answer

ENTRY POINT MAIN   Param       Parameter Mandatory  True        String   site       Parameter Mandatory  True        String   application       Parameter Mandatory  True        String   dir       Parameter Mandatory  True        String   applicationPool      Create Web IIS Application function ValidateWebSite   String   webSiteName         iisWebSite   Get-Website -Name  webSiteName     if  Null -eq  iisWebSite                Write-Error -Message  quot Error  Web Site Name     webSiteName  not exists  quot   -Category ObjectNotFound           else               return 1            Get full path from IIS WebSite function GetWebSiteDir   String   webSiteName         iisWebSite   Get-Website -Name  webSiteName     if  Null -eq  iisWebSite                Write-Error -Message  quot Error  Web Site Name     webSiteName  not exists  quot   -Category ObjectNotFound           else               return  iisWebSite PhysicalPath            Create Directory function CreateDirectory  string  fullPath         existEvaluation   Test-Path  fullPath -PathType Any     if  existEvaluation -eq  false                new-item  fullPath -itemtype directory           return 1    function CreateApplicationWeb       Param           String   WebSite           String   WebSitePath           String   application           String   applicationPath           String   applicationPool                fullDir    quot    WebSitePath     applicationPath  quot      CreateDirectory  fullDir      New-WebApplication -Site  WebSite -Name  application -PhysicalPath  fullDir -ApplicationPool  applicationPool -Force     fullWebSiteDir   GetWebSiteDir  Site f  null -ne  fullWebSiteDir        CreateApplicationWeb -WebSite  Site -WebSitePath  fullWebSiteDir -application  application  -applicationPath  dir -applicationPool  applicationPool

User · Answer

Let PowerShell analyze and decide the data type  It internally uses a  Variant  for this  And generally it does a good job    param  x   iTunes   New-Object -ComObject iTunes Application if   iTunes playerstate -eq 1         iTunes PlayerPosition    iTunes PlayerPosition    x    Or if you need to pass multiple parameters  param  x1   x2   iTunes   New-Object -ComObject iTunes Application if   iTunes playerstate -eq 1         iTunes PlayerPosition    iTunes PlayerPosition    x1      iTunes  lt AnyProperty gt      x2

User · Answer

You can use also the  args variable  that s like position parameters    step    args 0    iTunes   New-Object -ComObject iTunes Application  if   iTunes playerstate -eq 1       iTunes PlayerPosition    iTunes PlayerPosition    step    Then it can be called like  powershell exe -file itunersforward ps1 15

[powershell] How can I pass an argument to a PowerShell script?

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