how can i change the event while closing my powershell gui? - powershell

Question

I'm currently working on a powershell gui and i wanted to add a command to the closing event.
While starting the gui, i'm loading a session and i want to close it when leaving.
here is the part of my script:
Add-Type -AssemblyName System.Windows.Forms
Add-Type -AssemblyName System.Drawing
[System.Windows.Forms.Application]::EnableVisualStyle()
$Form = New-Object System.Windows.Forms.Form
$Form.ClientSize = '1300,700'
$Form.Text = "Test close event"
$Form.Add_Closing({
Param($sender,$e)
$result = [System.Windows.Forms.MessageBox]::show(`
"wish to quit?",`
"quit",[System.Windows.Forms.MessageBoxButtons]::YesNoCancel)
If($result -ne [System.Windows.Forms.DialogResult]::Yes)
{
Get-PSSession |Remove-PSSession
$e.Cancel = $true
}
})
$session = New-PSSession -ConfigurationName Microsoft.exchange -URI "server" -Authentication Kerberos
Import-PSSession $session | Out-Null
... Rest of the script ...
$Form.ShowDialog()
The rest work fine but this part seems to pose problem.
If someone has an idea i'm interested.

Answer 1

If I understood correctly, your form on closing displays the "wish to quit?" question successfully, then it successfully executes Get-PSSession | Remove-PSSession. But once all finished you see your Exchange connection is still active.
If that's the case, the following approach should work - use "script:" scope for your $session variable.
code fragments:
$script:session = New-PSSession -ConfigurationName Microsoft.exchange -URI "server" -Authentication Kerberos
Import-PSSession $script:session | Out-Null
Remove-PSSession $script:session
Full code:
Add-Type -AssemblyName System.Windows.Forms
Add-Type -AssemblyName System.Drawing
[System.Windows.Forms.Application]::EnableVisualStyle()
$Form = New-Object System.Windows.Forms.Form
$Form.ClientSize = '1300,700'
$Form.Text = "Test close event"
$Form.Add_Closing({
Param($sender,$e)
$result = [System.Windows.Forms.MessageBox]::show(`
"wish to quit?",`
"quit",[System.Windows.Forms.MessageBoxButtons]::YesNoCancel)
If($result -ne [System.Windows.Forms.DialogResult]::Yes)
{
Remove-PSSession $script:session
$e.Cancel = $true
}
})
$script:session = New-PSSession -ConfigurationName Microsoft.exchange -URI "server" -Authentication Kerberos
Import-PSSession $script:session | Out-Null
... Rest of the script ...
$Form.ShowDialog()
Note Since we are referencing session variable using "script:" prefix, you shall save your code in *.ps1 file and run it as a script, e.g. PS> C:\scripts\myscript.ps1
Reference:
about_Scopes