Hi,
i already asked the question
here
i have a problem with shared variables in runspaces with wpf forms.
I habe a wpf form with a button and a listbox. On the listbox i have a menuitem to export the results from the listbox.
When i click on the button i start a runspace, that gets some information (in the example i just do a get-service) and writes them to the listbox.
To have the possiblity to do an export of the items in the list box with all of the attributes i want to write the results of the command (get-service) to a shared variable that i can use in the wpf form later.
How it should work:
- Click Button
--> Start Runspace and call get-service (Search Button and Export-csv will be set to isenabled=false)
--> Write the results to a shared variable
--> Add the results to the listbox within the runspace
--> When runspace finished set search Button and Export-csv to isenabled=true
- Click ExportCSV
--> export the results from the shared variable with all attributes
Within the runspace i can see that the variable is filled correctly and i can add the results to the listbox or a text field in the wpf gui. The problem is, that when i try to use the shared variable outside the runspace it is empty.
If i do a similar thing without wpf gui the sharedvariable is accesible from my powershell session but wpf it wont work.
I am really stuck here and don't get a way to manage it. Can you please provide some help/ideas how to do it.
The global variable handle just was for testing issues.
Thanks in advance.
Regards,
Tom
[void][System.Reflection.Assembly]::LoadWithPartialName('presentationframework')
[void][System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms")
#region Load XAML
[xml]$script:XAMLTest = @"
<Window x:Class="Test.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:Test"
mc:Ignorable="d"
Title="Test" Height="479.303" Width="320.697" ResizeMode="NoResize" WindowStartupLocation="CenterScreen" Background="White">
<Grid Margin="0,1,2,-1" Background="#FFF0F0F0">
<Button x:Name="btn_search" Content="Search" HorizontalAlignment="Left" Margin="111,204,0,0" VerticalAlignment="Top" Width="75" FontSize="12" RenderTransformOrigin="3.108,9.031"/>
<ListBox x:Name="lst_search" HorizontalAlignment="Left" Height="189" Margin="27,10,0,0" VerticalAlignment="Top" Width="269">
<ListBox.ContextMenu>
<ContextMenu AllowDrop="True">
<MenuItem x:Name="lmi_exportcsv" Header="Export to CSV" IsEnabled="True"/>
</ContextMenu>
</ListBox.ContextMenu>
</ListBox>
<TextBox x:Name="txt_message" HorizontalAlignment="Left" Height="155" Margin="10,270,0,0" TextWrapping="NoWrap" VerticalAlignment="Top" Width="286" IsReadOnly="True" Background="#FFF0F0F0" VerticalScrollBarVisibility="Auto"/>
</Grid>
</Window>
"@ -replace 'mc:Ignorable="d"', '' -replace "x:N", 'N' -replace '^<Win.*', '<Window'
#region Load Form
try {
$TestForm = [Windows.Markup.XamlReader]::Load( (New-Object System.Xml.XmlNodeReader $XAMLTest) )
}
catch {
Write-Host "Cannot load Windows.Markup.XamlReader"
}
$XAMLTest.SelectNodes("//*[@Name]") | ForEach-Object {Set-Variable -Name ($_.Name) -Value $TestForm.FindName($_.Name)}
#endregion Load Form
#region variables
$services = @()
$script:sharedData = [HashTable]::Synchronized(@{})
#endregion variables
#region functions
function Invoke-ServiceSearch{
[CmdletBinding()]
param (
[parameter(Position=0,
Mandatory=$false)]
$Testform,
[parameter(Position=1,
Mandatory=$false)]
$lst_search,
[parameter(Position=2,
Mandatory=$false)]
$btn_search,
[parameter(Position=3,
Mandatory=$false)]
$txt_message,
[parameter(Position=4,
Mandatory=$false)]
$lmi_exportcsv,
[parameter(Position=5,
Mandatory=$false)]
$services
)
$code = {
$shareddata.services = Get-Service
$sharedData.testform.Dispatcher.invoke([action]{$null = $sharedData.lst_search.ItemsSource = $sharedData.services},'Normal')
$sharedData.testform.Dispatcher.invoke([action]{$null = $sharedData.txt_message.AppendText("Runspace: $($Shareddata.services.Name)")})
#$sharedData.testform.Dispatcher.invoke([action]{$null = $sharedData.lmi_exportcsv.IsEnabled="True"})
}
#region adding variables for use in new runspace
$shareddata = @{
testform = $testform
lst_search = $lst_search
btn_search = $btn_search
txt_message = $txt_message
services = $services
error = $error
}
#endregion adding variables
#generate a new runspace
$runspace = [RunSpaceFactory]::CreateRunspace()
$runspace.ApartmentState = 'STA'
$runspace.ThreadOptions = 'ReuseThread'
$runspace.Open()
#add shared variable to runspace
$runspace.SessionStateProxy.setVariable("sharedData", $sharedData)
#generate a new psthread and add script code
$ps = [PowerShell]::Create().AddScript($code)
$ps.Runspace = $runspace
$global:handle = $ps.BeginInvoke()
}
#endregion functions
$btn_search.Add_Click{
$SearchParams = @{
testform = $TestForm
btn_search = $btn_search
lst_search = $lst_search
txt_message = $txt_message
lmi_exportcsv = $lmi_exportcsv
services = $services
}
Invoke-ServiceSearch @SearchParams
}
$lmi_exportcsv.Add_Click{
$txt_message.AppendText("`nMain: $($shareddata.services.Name)")
}
$null = $TestForm.ShowDialog()
