Powershell/testrunspaces at master · kunaludapi/Powershell · GitHub

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<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfApp6"

        Title="MainWindow" Height="261.787" Width="779.468" Topmost="True">
    <Grid>
        <ProgressBar Name="ProgressBar" HorizontalAlignment="Left" Height="121" VerticalAlignment="Top" Width="497" Margin="115,29,0,0" Background="{x:Null}">
            <ProgressBar.OpacityMask>
                <ImageBrush ImageSource="c:\temp\completed.png"/>
            </ProgressBar.OpacityMask>
        </ProgressBar>
        <TextBlock Name="TextBox" HorizontalAlignment="Left" Margin="330,155,0,0" TextWrapping="Wrap" VerticalAlignment="Top"/>
        <Button Name="Button" Content="Button" HorizontalAlignment="Left" Margin="686,201,0,0" VerticalAlignment="Top" Width="75"/>
    </Grid>
</Window>

#Load required libraries
Add-Type -AssemblyName PresentationFramework, PresentationCore, WindowsBase, System.Windows.Forms, System.Drawing

$Runspace = [runspacefactory]::CreateRunspace()
$Runspace.ApartmentState = "STA"
$Runspace.ThreadOptions = "ReuseThread"
$Runspace.Open()

$code = {
    #$Path = Join-Path $PSScriptRoot -ChildPath 'Temp'
    $XamlPath = 'C:\Temp\Form.xaml'
    [xml]$xaml = Get-Content $XamlPath

    #Read the form
    $syncHash = [hashtable]::Synchronized(@{})
    $Reader = (New-Object System.Xml.XmlNodeReader $xaml)
    $syncHash.Form = [Windows.Markup.XamlReader]::Load($reader)

    #AutoFind all controls
    $xaml.SelectNodes("//*[@*[contains(translate(name(.),'n','N'),'Name')]]")  | ForEach-Object {
        #New-Variable -Name $syncHash.($_.Name) -Value $syncHash.Form.FindName($_.Name) -Force
        $syncHash.Add($_.Name, $syncHash.Form.FindName($_.Name))
    }

    function ProgressBar {
        param($syncHash,$Count = 100,$miliseconds = 100)
        $syncHash.Host = $host
        $Runspace = [runspacefactory]::CreateRunspace()
        $Runspace.ApartmentState = "STA"
        $Runspace.ThreadOptions = "ReuseThread"
        $Runspace.Open()
        $Runspace.SessionStateProxy.SetVariable("syncHash",$syncHash)
        $Runspace.SessionStateProxy.SetVariable("Count",$Count)
        $Runspace.SessionStateProxy.SetVariable("miliseconds",$miliseconds)

        $code = {
            $syncHash.form.Dispatcher.invoke([action]{ $syncHash.ProgressBar.Value = 0})
            for ($i=0; $i -lt $Count; $i++) {
                $syncHash.form.Dispatcher.invoke([action]{$syncHash.ProgressBar.value = $i})
                $syncHash.form.Dispatcher.invoke([action]{$syncHash.TextBox.Text = "$i%"})
                Start-Sleep -Milliseconds $miliseconds
            }
        }

        $PSinstance = [powershell]::Create().AddScript($Code)
        $PSinstance.Runspace = $Runspace
        $job = $PSinstance.BeginInvoke()
    }


    $syncHash.Button.Add_Click({
        ProgressBar -Count 100 -Milliseconds 100
    })

    $syncHash.Form.ShowDialog() | Out-Null
    $syncHash.Error = $Error
    $Runspace.Close()
    $Runspace.Dispose()
}

$PSinstance1 = [powershell]::Create().AddScript($Code)
$PSinstance1.Runspace = $Runspace
$job = $PSinstance1.BeginInvoke()