Question

我一直在阅读有关从不同的运行空间（http://learn-powershell.net/2012/10/14/powershell-and-wpf-writing-data-to-a-ui-from-a-different-runspace/）写入UI的博客。

我基本上是想要这样做，所以我可以点击UI中的按钮并运行PowerShell脚本并捕获该脚本的输出，并在不冻结UI的情况下更新WPF UI控件。

我尝试过直接编写一些输出的基本示例，但它似乎挂起了UI。我正在使用运行空间和调度程序，但我似乎陷入困境。

有什么想法吗？

感谢。

Add-Type –assemblyName PresentationFramework
Add-Type –assemblyName PresentationCore
Add-Type –assemblyName WindowsBase


$uiHash = [hashtable]::Synchronized(@{})
$newRunspace.ApartmentState = "STA"
$newRunspace.ThreadOptions = "ReuseThread"
$newRunspace.Open() 
$newRunspace.SessionStateProxy.SetVariable('uiHash',$uiHash)

$psCmd = [PowerShell]::Create().AddScript({
[xml]$xaml = @"
<Window 
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        x:Name="Window" Title="Patcher" Height="350" Width="525" Topmost="True">
    <Grid>
        <Label Content="A Builds" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" Width="88" RenderTransformOrigin="0.191,0.566"/>
        <ListBox HorizontalAlignment="Left" Height="269" Margin="10,41,0,0" VerticalAlignment="Top" Width="88"/>
        <Label Content="New Build" HorizontalAlignment="Left" Margin="387,10,0,0" VerticalAlignment="Top"/>
        <TextBox HorizontalAlignment="Left" Height="23" Margin="387,41,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="120"/>
        <Label Content="B Builds" HorizontalAlignment="Left" Margin="117,10,0,0" VerticalAlignment="Top" RenderTransformOrigin="0.528,-0.672"/>
        <ListBox HorizontalAlignment="Left" Height="269" Margin="103,41,0,0" VerticalAlignment="Top" Width="88"/>
        <Label Content="C Builds" HorizontalAlignment="Left" Margin="185,10,0,0" VerticalAlignment="Top"/>
        <ListBox HorizontalAlignment="Left" Height="269" Margin="196,41,0,0" VerticalAlignment="Top" Width="88"/>
        <Button x:Name="PatchButton" Content="Patch!" HorizontalAlignment="Left" Margin="426,268,0,0" VerticalAlignment="Top" Width="75"/>
        <RichTextBox x:Name="OutputTextBox" HorizontalAlignment="Left" Height="194" Margin="289,69,0,0" VerticalAlignment="Top" Width="218">
            <FlowDocument>
                <Paragraph>
                    <Run Text=""/>
                </Paragraph>
            </FlowDocument>
        </RichTextBox>

    </Grid>
</Window>
"@

$reader = (New-Object System.Xml.XmlNodeReader $xaml)
$uiHash.Window = [Windows.Markup.XamlReader]::Load($reader)

$uiHash.Button = $uiHash.Window.FindName("PatchButton")
$uiHash.OutputTextBox = $uiHash.Window.FindName("OutputTextBox")

$uiHash.OutputTextBox.Dispatcher.Invoke("Render", [Windows.Input.InputEventHandler]    {$uiHash.OutputTextBox.UpdateLayout()}, $null, $null)

$uiHash.Window.ShowDialog() | Out-Null
})
$psCmd.Runspace = $newRunspace
$data = $psCmd.BeginInvoke()

# The next line fails (null-valued expression)
<#
$uiHash.OutputTextBox.Dispatcher.Invoke("Normal", [action]{
    for ($i = 0; $i -lt 10000; $++) {
        $uiHash.OutputTextBox.AppendText("hi")
    }
})#>

Answer 1

我遇到了同样的问题并且看到了一些建议，这些建议要么引用C＃类，要么将UI放在worker中而不是实际的worker任务中。无论如何，在花了相当长的一段时间后我才明白：

Add-Type -AssemblyName PresentationFramework
$Xaml = New-Object System.Xml.XmlNodeReader([XML]@"
<Window
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Test" WindowStartupLocation = "CenterScreen" ShowInTaskbar = "True">
    <Grid>
        <TextBox x:Name = "TextBox"/>
    </Grid>
</Window>
"@)

Function Start-Worker {
    $TextBox = $Window.FindName("TextBox")
    $SyncHash = [hashtable]::Synchronized(@{Window = $Window; TextBox = $TextBox})
    $Runspace = [runspacefactory]::CreateRunspace()
    $Runspace.ThreadOptions = "ReuseThread"         
    $Runspace.Open()
    $Runspace.SessionStateProxy.SetVariable("SyncHash", $SyncHash)          
    $Worker = [PowerShell]::Create().AddScript({
        for($Progress=1; $Progress -le 10; $Progress++){
            $SyncHash.Window.Dispatcher.Invoke([action]{$SyncHash.TextBox.AppendText($Progress)})
            Start-Sleep 1                                                       # Some background work
        }
    })
    $Worker.Runspace = $Runspace
    $Worker.BeginInvoke()
}

$Window = [Windows.Markup.XamlReader]::Load($Xaml)                              # Requires -STA mode
$Window.Add_Loaded({Start-Worker})
[Void]$Window.ShowDialog()

有关Windows控件示例，请参阅：PowerShell: Job Event Action with Form not executed

Answer 2

出于好奇，您是否考虑过而不是 PowerShell 启动 WPF 并显示一些输出，它应该是相反的方式？

也许您应该从 WPF 应用程序中调用 PowerShell ，并捕获要显示的输出？

http://www.codeproject.com/Articles/18229/How-to-run-PowerShell-scripts-from-C

Answer 3

我在你的代码中做了一些调整。我不会在调度程序中运行For循环，而是在For循环中运行调度程序块。我测试了它似乎没有为我锁定（有一些表现不是最好的，但这是预期的）并继续写入窗口。

for ($i = 0; $i -lt 10000; $i++) { $uiHash.OutputTextBox.Dispatcher.Invoke("Normal", [action]{ $uiHash.OutputTextBox.AppendText("hi") }) }

Answer 4

这可能有点晚，但请尝试下载WPFRunspace，它为WPF和Win Forms GUI脚本提供Powershell后台工作cmdlet，该脚本将在后台执行并在收到输出或完成时更新GUI。

将PowerShell输出（实际发生）写入WPF UI Control

4 个答案: