Script which contains a Yes/No message box to close an application is not working

Question

I am attempting to write a script that will display a message box with yes/no buttons. I am wanting “Yes” to close an open application & “No” to end the script.

I have written a few mutations of the code below but the best I could get was both yes & no closed the application. Here’s my code:

Add-Type -AssemblyName PresentationCore,PresentationFramework
[System.Windows.MessageBox]::Show('Do you want to close TAS?',‘WARNING’,‘YesNo’)
[System.Windows.MessageBoxImage]::Warning

$msgBoxInput = [System.Windows.MessageBoxButton]::Show(‘YesNo’)

   switch  ($msgBoxInput) {
       ‘Yes’ {
           Stop-Process -Name ATIS-Broadcaster2 
           ‘YES’
        }

        ‘No’ {
           Exit-PSSession
           ‘NO’
        }
}

Answer 1

Try the following:

Add-Type -AssemblyName PresentationCore, PresentationFramework

switch (
  [System.Windows.MessageBox]::Show(
    'Do you want to close TAS?',
    'WARNING',
    'YesNo',
    'Warning'
  )
) {
  'Yes' {
    'YES'
    #  Stop-Process -Name ATIS-Broadcaster2 
  }
  'No' {
    'NO'
    #  Exit-PSSession
  }
}

^{Note: I've also converted your "curly" single quotes to regular, ASCII-range ones; while PowerShell accepts both types, it's better to stick with the latter.}

See the System.Windows.MessageBox docs.

Note that the parameters to which 'YesNo' and 'Warning' are passed, as well as the .Show() method's return value, expect / return enumeration values^[1].

However, PowerShell's automatic type conversions conveniently allow just specifying the value names as strings, such as 'YesNo', 'Warning' or 'Yes' in lieu of [System.Windows.MessageBoxButton]::YesNo, [System.Windows.MessageBoxImage]::Warning, and [System.Windows.MessageBoxResult]::Yes, which simplifies the code.

---

^{[1] That is, instances of value types derived from System.Enum, which define discrete numeric values under symbolic names.}