如何从 Powershell 运行空间连接回主 Powershell 线程？

Question

我已经开始在 powershell 中考虑运行空间和 我能够做到以下几点

• 创建运行空间
• 将变量传递给它
• 将预先编写的函数传递给它
• GUI/WPF 出现了，我什至可以操作上面的元素（例如，更改文本块中的文本）

问题是按钮之一（BTN_Exit）... 我想在单击时实现这一点，它不仅会关闭 GUI，还会关闭它运行的 RunSpace。我已经到了设法关闭 GUI 甚至调用 Runspace 的关闭序列的地步，但是（我假设）由于被调用的函数在 RunSpace 本身中运行，它只是挂断了（RunSpace 仍然处于“关闭”状态状态） - 显然 Powershell 无法杀死自己 :) 幸运的是，我仍然能够使用 $(Get-Runspace)[-1].Dispose()（手动）从主线程处理它

我相信我需要连接回创建 GUI 运行空间的主线程并从那里关闭它，但我无法在函数中返回那里。如果窗口打开，我可以手动执行 close-runspace 函数中的所有 cmdlet，并达到预期的目标。

我尝试添加$rs.connect($(Get-Runspace).Name -eq "Runspace1") 和$RS.disconnect() 如果我在“句柄”或实例上尝试相同的操作，它会产生相同的结果。如果不将函数传递给 RunSpace，我也无法在单击按钮时调用原始函数。

我如何以编程方式达到在单击按钮时关闭 GUI 并释放运行空间的程度？

代码如下：

#===[___VARIABLES___]===
$GUI = [hashtable]::Synchronized(@{})
$GUI.Host = $host

#===[___FUNCTIONS___]===
function Close-RunSpace {
  if(!($RSI01H.Iscompleted)){
    $GUI.BS.Dispatcher.invoke([action]{
      $GUI.BS.Close()
    })
  }
  $RSI01.EndInvoke($RSI01H)
  $RS.Close()
  $RS.Dispose()
}

#===[__RunSpaceCfg__]===
$RS_ISS = [system.management.automation.runspaces.initialsessionstate]::CreateDefault()
$RS_ISS.Commands.Add((New-Object System.Management.Automation.Runspaces.SessionStateFunctionEntry -ArgumentList 'Close-RunSpace', (Get-Content Function:\Close-RunSpace -ErrorAction Stop)))
$RS = [runspacefactory]::CreateRunspace($RS_ISS)
$RS.ApartmentState = "STA"
$RS.ThreadOptions = "ReuseThread"
$RS.Open()
$RS.SessionStateProxy.SetVariable("GUI",$GUI)
$RS.SessionStateProxy.SetVariable("RS",$RS)
$RS.SessionStateProxy.SetVariable("RSI01",$RSI01)
$RS.SessionStateProxy.SetVariable("RSI01H",$RSI01H)

#===[___EXECUTION___]===
$RSI01 = [powershell]::Create().AddScript(
  {
    [void][System.Reflection.Assembly]::LoadWithPartialName("PresentationCore")
    [void][System.Reflection.Assembly]::LoadWithPartialName("PresentationFramework")
    [void][System.Reflection.Assembly]::LoadWithPartialName("WindowsBase")
    [void][System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms")

    $Def_XAML = DATA {'
      <Window x:Name="BS" x:Class="PST.MainWindow"
        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:PST"
        mc:Ignorable="d"
        Title="BootStrapR" 
        Height="450" 
        Width="800" 
        ResizeMode="NoResize" 
        Topmost="True" 
        FontFamily="Arial" 
        WindowStartupLocation="CenterScreen" 
        WindowStyle="None">
      <Grid>
        <Button x:Name="BTN_Update" 
          Content="Update" 
          HorizontalAlignment="Left" 
          VerticalAlignment="Top" 
          Margin="109,352,0,0" 
          Width="75"/>
        <Button x:Name="BTN_Exit" 
          Content="exit" 
          HorizontalAlignment="Left" 
          Margin="431,352,0,0" 
          VerticalAlignment="Top" 
          Width="75"/>
        <ProgressBar x:Name="pb" 
          HorizontalAlignment="Left" 
          Height="29" 
          Margin="10,150,0,0" 
          VerticalAlignment="Top" 
          Width="780" 
          Background="White" 
          Foreground="Black" 
          BorderBrush="White" 
          Value="0" />
        <TextBlock x:Name="pstext" 
          HorizontalAlignment="Left" 
          Height="266" 
          Margin="26,22,0,0" 
          TextWrapping="Wrap" 
          Text="TextBlock" 
          VerticalAlignment="Top" 
          Width="223"/>
        </Grid>
      </Window>
    '}

    [xml]$XAML = $Def_XAML -replace 'x:Class=*.*','' `
                           -replace 'mc:Ignorable="d"','' `
                           -replace "x:Name",'Name'
    $WPF = [Windows.Markup.XamlReader]::Load((New-Object System.Xml.XmlNodeReader $XAML))
    $XAML.SelectNodes("//*[@Name]") | ForEach-Object{
      $GUI."$($_.Name)" = $WPF.FindName($_.Name)
    }

    $GUI.Error = $Error

    $GUI.BTN_Exit.Add_Click({
      #$GUI.BS.Close()
      Close-RunSpace
    })

    $GUI.BTN_Update.Add_Click({
      $GUI.pb.Value+=1
    })

    $GUI.BS.ShowDialog() | Out-Null
  }
)
$RSI01.Runspace = $RS
$RSI01.Runspace.Name = "GUI"
$RSI01H = $RSI01.BeginInvoke()

Answer 1

哦，我忘记了这篇文章！ 我找到的解决方案/解决方法在 this 文章中。

基本上，本地 RunSpace 也需要传递到运行 GUI 的 RunSpace。 （我做了:)）然后可以引发在主线程中调用函数/脚本块等的事件。 这个事件触发器然后做家务并清理/删除 GUI Runspace 注意：窗口本身需要从 GUI RunSpace 内关闭/@按钮单击，否则 Runspace 不会进入 IsComplete 状态并且被调用的函数将挂起（等到RS完成）

#===[___VARIABLES___]===
$Global:GUI = [hashtable]::Synchronized(@{})
$Global:VAR = [hashtable]::Synchronized(@{})
$VAR.Host = $Host

#===[______XAML_____]===
$XAML_BS = @"
<Window x:Name="BootStrapper" x:Class="SIT_SDM.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:SIT_SDM"
  mc:Ignorable="d"
  Height="450" Width="800" Background="#FF2F1333" WindowStyle="None">
 <Grid>
   <Button Name="BS_BTN_X" Content="Close" Margin="600,0,25,0" VerticalAlignment="Top" Width="75"/>
 </Grid>
</Window>
"@

#===[___FUNCTIONS___]===
function BS_Close {
  begin {
    $Global:GUI.BootStrapper.Add_Closing({$_.Cancel = $true})
  }

  process {
    if ($BS_Handle.IsCompleted) {
      $BS.EndInvoke($BS_Handle)
      $BS.RunSpace.Close()
      $BS.RunSpace.Dispose()
    } else {
      Write-Error -Text "Runspace job not complete!"
    }
    Unregister-Event -SourceIdentifier "BS_Close"
  }

  end {
    if ((Get-Runspace).count -ge 2) {
      $(Get-Runspace)[-1].Dispose()
    }
  }
}

function Initialize-XAML {

  [CmdletBinding()]
  Param(
    [Parameter()]
    [string]$File,
    [string]$Variable
  )
  [void][System.Reflection.Assembly]::LoadWithPartialName("PresentationCore")
  [void][System.Reflection.Assembly]::LoadWithPartialName("PresentationFramework")

  if (!([string]::IsNullOrEmpty($File))) {
    $inputXAML = Get-Content -Path $File -ErrorAction Stop
  } elseif (!([string]::IsNullOrEmpty($Variable))) {
    $inputXAML = $Variable 
  } else {
    #Write-Error "Neither File nor Variable has been declared"
    break
  }

   #Clean XAML for PowerShell compatibilty
   [xml]$XAML = $inputXAML -replace 'x:Class=*.*','' -replace 'mc:Ignorable="d"','' -replace "x:Name",'Name'

  #Create the XAML reader using XML node reader 
  $ReadR = [Windows.Markup.XamlReader]::Load((New-Object System.Xml.XmlNodeReader $XAML))

  #Grab named objects from tree and put in a flat structure using Xpath
  $NamedNodes = $XAML.SelectNodes("//*[@*[contains(translate(name(.),'n','N'),'Name')]]")
  $NamedNodes | ForEach-Object {
    $Script:GUI.Add($_.Name, $ReadR.FindName($_.Name))
  }
}

#===[___EXECUTION___]===
$InitialSessionState = [System.Management.Automation.Runspaces.InitialSessionState]::CreateDefault()
$Functions = Get-Command -Module SITSD #Script is being used with import-module

foreach($Function in $Functions){
  $functionDefinition = Get-Content function:\$Function
  $functionEntry = New-Object System.Management.Automation.Runspaces.SessionStateFunctionEntry -ArgumentList $Function.Name, $functionDefinition
  $InitialSessionState.Commands.Add($functionEntry)
}

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

#Passing variables to Runspace
$RS.SessionStateProxy.SetVariable("GUI",$GUI)
$RS.SessionStateProxy.SetVariable("VAR",$VAR)
$RS.SessionStateProxy.SetVariable("XAML_BS",$XAML_BS)

Register-EngineEvent -SourceIdentifier "BS_Close" -Action {BS_Close}

$BS = [PowerShell]::Create().AddScript({
  Initialize-XAML -Variable $XAML_BS

  $GUI.BS_BTN_X.Add_Click({
     $Global:VAR.host.UI.Write("Button pressed")
     $GUI.BootStrapper.Close()
     $Global:VAR.Host.Runspace.Events.GenerateEvent( "BS_Close", $GUI.BS_BTN_X, $null, "BS_Close")
  })

  $GUI.BootStrapper.Showdialog()|Out-Null
})

$BS.RunSpace = $RS
$BS_Handle = $BS.BeginInvoke()