PowerShell progress Bar invocation fails in Runspace - wpf

Question

I am creating a PowerShell script with a GUI, that copies user profiles from a selected source disk to a destination disk. I've created the GUI in XAML, with VS Community 2019.
My copy function is called from a runspace and works fine. I would like to put a progress bar inside this runspace so that it increases for each folder copied, but I can't figure out how.
Here is my runspace :
function RunspaceBackupData {
$Runspace = [runspacefactory]::CreateRunspace()
$Runspace.ApartmentState = "STA"
$Runspace.ThreadOptions = "ReuseThread"
$Runspace.Open()
$Runspace.SessionStateProxy.SetVariable("syncHash",$syncHash)
$Runspace.SessionStateProxy.SetVariable("SelectedFolders",$global:SelectedFolders)
$Runspace.SessionStateProxy.SetVariable("SelectedUser",$global:SelectedUser)
$Runspace.SessionStateProxy.SetVariable("ReturnedDiskSource",$global:ReturnedDiskSource)
$Runspace.SessionStateProxy.SetVariable("ReturnedDiskDestination",$global:ReturnedDiskDestination)
$code = {
foreach ($item in $global:SelectedFolders) {
copy-item -Path "$global:ReturnedDiskSource\Users\$global:SelectedUser\$item" -Destination "$global:ReturnedDiskDestination\Users\$global:SelectedUser\$item" -Force -Recurse
}
}
$PSinstance = [powershell]::Create().AddScript($Code)
$PSinstance.Runspace = $Runspace
$job = $PSinstance.BeginInvoke()
}
Here is my event-handler :
$var_btnStart.Add_Click( {
RunspaceBackupData -syncHash $syncHash -SelectedFolders $global:SelectedFolders -SelectedUser $global:SelectedUser -ReturnedDiskSource $global:ReturnedDiskSource -ReturnedDiskDestination $global:ReturnedDiskDestination
})
Can you please help me ?

Answer 1

Ok i've managed to get my progress bar working. First you gotta add it to your hashtable variable :
$syncHash.ProgressBar = $syncHash.Window.FindName("ProgressBar")
Then you can create your event-handler like this :
$var_btnStart.Add_Click( {
$Runspace = [runspacefactory]::CreateRunspace()
$Runspace.ApartmentState = "STA"
$Runspace.ThreadOptions = "ReuseThread"
$Runspace.Open()
$Runspace.SessionStateProxy.SetVariable("syncHash",$syncHash)
$Worker =
[PowerShell]::Create().AddScript({$syncHash.ProgressBar.Dispatcher.Invoke([action]
{$SyncHash.ProgressBar.IsIndeterminate = $true }, "Normal")}
##YOUR CODE HERE
$syncHash.Error = $Error
$syncHash.ProgressBar.Dispatcher.Invoke([action]{$SyncHash.ProgressBar.IsIndeterminate = $false }, "Normal")
})
$Worker.Runspace = $Runspace
$Worker.BeginInvoke()})
Note that in this example your progress bar is indeterminate, so it starts looping when you click on the button, and stops when you code ends.
Don't forget to dispose your runspace then :
$Runspace.PowerShell.Close($Runspace) $Runspace.PowerShell.Dispose($Runspace)

Answer 2

Inside $code you need to keep the count, so I suggest a for-loop.
Inside the loop you can call the dispatcher in the window-object:
$syncHash.Window.Dispatcher.Invoke([action]{$syncHash.Progressbar.Value = [double] <code for finished percentage>}, "Normal")
I suspect you have window and progressbar in $syncHash