我如何在Powershell的参数中像C＃那样声明出来

Question

I have c# code and i want to find alternative of this code in PowerShell . I found something like [ref]$parameter but it's doesn't work . My code is :

private static bool testfunction(string param1, out string param 2)
{
    param1 = "";
    param2 += "Hello";
    return true;
}

Please give me alternative code in PowerShell.

i try this :

class tst 
{

    static test([ref]$param)
    {
        $param.Value  = "world "

    }
}

$test = "ddd"
$test

[tst]::test($test)
$test

this is doesn't work.

Answer 1

function testfunction {
   param (
       [string]
       $param1,
       [ref]
       $param2
   )

   $param2.value= "World"
   return $true
}

PS C:\> $hello = "Hello"

PS C:\> testfunction "someString" ([ref]$hello)
True

PS C:\> $hello
World

Powershell supports ref parameters. Be sure to call the ref parameter in brackets (eg ([ref] $parameter ). Be also be aware to only declare [ref] as type in the param block. Further details:

stackoverflow

ss64

hope that helps

UPDATE

You've to call your test method with the ref keyword -> use [tst]::test([ref]$test) instead of `[tst]::test($test)

PS C:\> $test = "ddd"

PS C:\> $test
ddd

PS C:\> [tst]::test([ref]$test)

PS C:\> $test
world 

Answer 2

use [ref] when you use class :

class tst 
{

    static test([ref]$param)
    {
        $param.Value  = "world "

    }
}

$test = "ddd"
$test

[tst]::test([ref]$test)
$test