Feed XML into XAML/PowerShell WPF Form - wpf

Question

I had a question along a similar topic last week which ultimatly is the same issue but in that scenario I managed to get round this with a PowerShell array on static data thanks to someone on the forum suggesting.
This time round I cant use static so I am somewhat back to my root problem.
I have created a WPF XAML form in Visual Studio and am taking this back to Powershell as my remit with the customer is 'low-code'. The item in question is loading an xml file into the form to populate a list box. Reason for a list box is cleanliness of changing the colour of the background.
Now in VS this works find with a Data Provider but for reasons I cannot find an answer to, this just simply will not work when taken back to PowerShell so I have looked for alternate way.
So I have a simple XML as below:
<?xml version="1.0"?>
<Configuration>
<AllowedAutoStart>Application 1</AllowedAutoStart>
<DenyRemoveAutoStart>Application 2</DenyRemoveAutoStart>
</Configuration>
I want to feed this into my PowerShell/XAML Hybrid Script and simply bind the contents to the appropriate list box (below code is just starting with allowed apps)
I have tried a few different ideas from across the forum before posting but none quite get there. Below is the code I have at present, it doesnt work but doesnt produce any errors either :-)
Appreciate any guidance.
# Load Assembly
Add-Type -AssemblyName PresentationFramework
Add-Type -AssemblyName PresentationCore
Add-Type -AssemblyName WindowsBase
#Declare XAML Code
[xml]$AppGeneratorWindow = #"
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
Title="App Config Generator" Height="350" Width="600" WindowStartupLocation="CenterScreen" Top="5" ResizeMode="NoResize">
<Window.Background>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="Black" Offset="0"/>
<GradientStop Color="#FFAA3D3D" Offset="1"/>
</LinearGradientBrush>
</Window.Background>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="5*"/>
<ColumnDefinition Width="115*"/>
<ColumnDefinition Width="132*"/>
<ColumnDefinition Width="543*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="381*"/>
<RowDefinition Height="241*"/>
</Grid.RowDefinitions>
<Label Name="AllProgramsLabel" Content="All Programs" HorizontalAlignment="Left" Margin="28.333,20,0,0" VerticalAlignment="Top" Foreground="#FFFEFBFB" FontSize="14" FontWeight="Bold" RenderTransformOrigin="2.696,-3.142" Grid.Column="1" Grid.ColumnSpan="2"/>
<Button Name="AddButton" Content="Add >>" HorizontalAlignment="Left" Margin="34,83,0,0" VerticalAlignment="Top" Width="166" FontWeight="Bold" FontSize="14" Height="28" BorderBrush="#FF070606" Background="#FF933838" Foreground="#FFFCFAFA" Grid.Column="3" RenderTransformOrigin="0.416,-0.906"/>
<Label Name="WindowsStartupLabel" Content="Windows Startup" HorizontalAlignment="Left" Margin="236,20,0,0" VerticalAlignment="Top" Foreground="#FFFEFBFB" FontSize="14" FontWeight="Bold" RenderTransformOrigin="2.696,-3.142" Grid.Column="3"/>
<Button Name="RemoveButton" Content="<< Remove" HorizontalAlignment="Left" Margin="34,169,0,0" VerticalAlignment="Top" Width="166" FontWeight="Bold" FontSize="14" Height="28" BorderBrush="#FF070606" Background="#FF933838" Foreground="#FFFCFAFA" Grid.Column="3" Grid.RowSpan="2" RenderTransformOrigin="0.51,-0.503"/>
<ListBox Name="AllProgramsListBox" Grid.ColumnSpan="2" Grid.Column="1" HorizontalAlignment="Left" Height="132" Margin="28,65,0,0" Background="#FFAA3D3D" VerticalAlignment="Top" Width="123" Grid.RowSpan="2"/>
<ListBox Name="StartupListBox" Grid.Column="3" HorizontalAlignment="Left" Height="132" Margin="237,65,0,0" Background="#FFAA3D3D" VerticalAlignment="Top" Width="123" Grid.RowSpan="2"/>
</Grid>
</Window>
"#
#List Boxes
$AllProgramsListBox = $window.FindName("AllProgramsListBox")
$ConfigurationFile = "$env:ProgramData\WindowsStartupTool\AutoStartConfig.XML"
[xml]$ConfigFile = Get-Content $ConfigurationFile
foreach ($entry in $ConfigFile.Configuration.AllowedAutoStart.add)
{
write-host $entry
$AllProgramsListBox.Items.Add($($entry))
}
#Declare & Create the form
$reader=(New-Object System.Xml.XmlNodeReader $AppGeneratorWindow)
$window = [Windows.Markup.XamlReader]::Load($reader)
##########################################
#Launch the User Interface #
[void]$window.ShowDialog() #
##########################################
This is launched from PowerShell which is where I have to get it to work from in some capacity.
Thanks in advance

Answer 1

You're very close. All you really have to do is move the part where you read the config file and do the foreach ($entry.. to below the creation of the window.
As the code is now, you're trying to use variable $window where it is not yet defined.
Directly below the XAML code put:
#Declare & Create the form
$reader = New-Object System.Xml.XmlNodeReader $AppGeneratorWindow
$window = [Windows.Markup.XamlReader]::Load($reader)
#List Boxes
$AllProgramsListBox = $window.FindName("AllProgramsListBox")
$ConfigurationFile = "$env:ProgramData\WindowsStartupTool\AutoStartConfig.XML"
[xml]$ConfigFile = Get-Content $ConfigurationFile -Raw
foreach ($entry in $ConfigFile.Configuration.AllowedAutoStart) {
Write-Host $entry
$AllProgramsListBox.Items.Add($entry)
}
##########################################
#Launch the User Interface #
[void]$window.ShowDialog() #
##########################################