Powershell – How to call a method with output parameters in PowerShell

powershellremote-registrywmi

I'm working on a script to get started in PowerShell. I'm trying to convert a working VBScript script that enumerates mapped network drives on a remote Windows computer.

One of the tasks is to use remote WMI to read the registry and find the process owner of explorer.exe in order to determine who is logged in. This seems easy enough going by this guide.

However, the WMI method I need to call is GetOwner() from Win32_Process, which requires two output parameters to store its return value.

How can I call a method with output parameters? When I try to give it two strings, I get the error: Cannot find an overload for "GetOwner" and the argument count: "2".. The MSDN page says there are two parameters, so I'm not sure what I'm doing wrong.

Best Answer

Using the [ref] modifier

SomeMethod( [ref] $a );

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Windows – How to run a PowerShell script

Launch Windows PowerShell, and wait a moment for the PS command prompt to appear
Navigate to the directory where the script lives
```
PS> cd C:\my_path\yada_yada\ (enter)
```
Execute the script:
```
PS> .\run_import_script.ps1 (enter)
```

What am I missing??

Or: you can run the PowerShell script from cmd.exe like this:

powershell -noexit "& ""C:\my_path\yada_yada\run_import_script.ps1""" (enter)

according to this blog post here

Or you could even run your PowerShell script from your C# application :-)

Asynchronously execute PowerShell scripts from your C# application

Powershell – How to pass multiple parameters into a function in PowerShell

Parameters in calls to functions in PowerShell (all versions) are space-separated, not comma separated. Also, the parentheses are entirely unneccessary and will cause a parse error in PowerShell 2.0 (or later) if Set-StrictMode -Version 2 or higher is active. Parenthesised arguments are used in .NET methods only.

function foo($a, $b, $c) {
   "a: $a; b: $b; c: $c"
}

ps> foo 1 2 3
a: 1; b: 2; c: 3

Best Answer

Related Solutions

Windows – How to run a PowerShell script

Powershell – How to pass multiple parameters into a function in PowerShell

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