Pass parameter from a batch file to a PowerShell script

Question

In my batch file  I call the PowerShell script like this   powershell exe   amp   G  Karan PowerShell Scripts START DEV ps1    Now  I want to pass a string parameter to START DEV ps1  Let s say the parameter is w Dev   How can I do this

User · Answer

Assuming your script is something like the below snippet and named testargs.ps1

param ([string]$w)
Write-Output $w

You can call this at the commandline as:

PowerShell.Exe -File C:\scripts\testargs.ps1 "Test String"

This will print "Test String" (w/o quotes) at the console. "Test String" becomes the value of $w in the script.

User · Answer

Let s say you would like to pass the string Dev as a parameter  from your batch file   powershell -command  G  Karan PowerShell Scripts START DEV ps1 Dev    put inside your powershell script head    w    args 0           w would be set to  Dev    This if you want to use the built-in variable  args  Otherwise    powershell -command  G  Karan PowerShell Scripts START DEV ps1 -Environment   Dev      and inside your powershell script head   param  string  Environment    This if you want a named parameter   You might also be interested in returning the error level   powershell -command  G  Karan PowerShell Scripts START DEV ps1 Dev  exit  LASTEXITCODE    The error level will be available inside the batch file as  errorlevel

User · Answer

Add the parameter declaration at the top of ps1 file  test ps1  param      Our preferred encoding    parameter Mandatory  false      ValidateSet  UTF8   Unicode   UTF7   ASCII   UTF32   BigEndianUnicode       string  Encoding    UTF8     write   Encoding    0   -f  Encoding    Result  C  temp gt    test ps1 -Encoding ASCII Encoding   ASCII

User · Answer

The answer from  Emiliano is excellent  You can also pass named parameters like so   powershell exe -Command  G  Karan PowerShell Scripts START DEV ps1  -NamedParam1  SomeDataA  -NamedParam2  SomeData2    Note the parameters are outside the command call  and you ll use    parameter Mandatory  false      string  NamedParam1   parameter Mandatory  false      string  NamedParam2

User · Answer

When a script is loaded  any parameters that are passed are automatically loaded into a special variables  args  You can reference that in your script without first declaring it   As an example  create a file called test ps1 and simply have the variable  args on a line by itself  Invoking the script like this  generates the following output   PowerShell exe -File test ps1 a b c  Easy as one  two  three  a b c Easy as one  two  three   As a general recommendation  when invoking a script by calling PowerShell directly I would suggest using the -File option rather than implicitly invoking it with the  amp  - it can make the command line a bit cleaner  particularly if you need to deal with nested quotes

[powershell] Pass parameter from a batch file to a PowerShell script

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