Calling c# custom actions from PowerShell

Question

I am trying to execute a custom action method from power-shell here is the code I have written in c#

namespace MyCustomAction
{
    public class CustomActions
    {
       [CustomAction]
        public static Session TestResult(Session session)
        {
            session["name"] = "hello";
            return session;
        }
    }
}

After building t he solution here is how I am loading the assemblies

[System.Reflection.Assembly]::LoadFile("C:\Program Files (x86)\WiX Toolset v3.10\SDK\Microsoft.Deployment.WindowsInstaller.dll")

[System.Reflection.Assembly]::LoadFile("D:\CustomAction\\bin\x86\Debug\MyCustomAction.dll") | Out-Null

But I am not getting how to pass session to the method as required I tried the following but no luck

$session = [Microsoft.Deployment.WindowsInstaller.Session]
[MyCustomAction.CustomActions]::TestResult($session)

Have you read this? Seems to be the same, though i've never tried this! stackoverflow.com/questions/22958493/… — Richard Dakin
– Richard Dakin, Commented Jun 29, 2017 at 10:46

Subbu · Accepted Answer · 2017-06-29 12:31:42Z

0

If you are trying to create a new object of your class, you can use the New-Object

$session = New-Object [Microsoft.Deployment.WindowsInstaller.Session]

https://msdn.microsoft.com/en-us/powershell/reference/5.1/microsoft.powershell.utility/new-object

answered Jun 29, 2017 at 12:31

Subbu

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3 Comments

Developer Over a year ago

Getting following error

New-Object : Cannot find type [[Microsoft.Deployment.WindowsInstaller.Session]]: verify that the assembly containing this type is loaded

Subbu Over a year ago

Sorry, you don't need to give the square bracket "[" for your type $session = New-Object Microsoft.Deployment.WindowsInstaller.Session

Developer Over a year ago

Then I am getting following error

New-Object : A constructor was not found. Cannot find an appropriate constructor for type Microsoft.Deployment.WindowsInstaller.Session.

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