ListBox Eventhandler for Powershell-Script needed - powershell

Question

Im trying to make a powershellscript using XAML Objects, that can be used to configure AD-Users.
My goal right now is to add a live search for a specific textbox. The script uses the input from the textbox, compares it to AD-Users and displays the output in a listbox. What I need is an eventhandler, that activates when I click any Item in the listbox
The last part is the relevant piece.
I'm grateful for any help.
$inputXML = #"
<Window x:Class="WpfApplication3.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:WpfApplication3"
mc:Ignorable="d"
Title="HHI Helpdesk Helper" Height="350" Width="654.604" Icon="C:\Users\hoesl\Pictures\logo.png" WindowStartupLocation="CenterScreen">
<Grid Background="#FFA0A0A0">
<TabControl x:Name="tabControl" HorizontalAlignment="Left" Height="301" Margin="10,10,0,0" VerticalAlignment="Top" Width="628">
<TabItem Header="Enable Admin Account">
<Grid Background="#FFE5E5E5">
<Label x:Name="label" Content="User : " HorizontalAlignment="Left" Margin="47,10,0,0" VerticalAlignment="Top"/>
<Label x:Name="label1" Content="Service-Tag : " HorizontalAlignment="Left" Margin="10,53,0,0" VerticalAlignment="Top"/>
<Label x:Name="label2" Content="Set Password : " HorizontalAlignment="Left" Margin="2,95,0,0" VerticalAlignment="Top"/>
<TextBox x:Name="textBox1" HorizontalAlignment="Left" Height="23" Margin="95,57,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="120"/>
<TextBox x:Name="textBox2" HorizontalAlignment="Left" Height="23" Margin="95,99,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="120"/>
<Calendar HorizontalAlignment="Left" Margin="434,10,0,0" VerticalAlignment="Top"/>
<TextBlock x:Name="textBlock" HorizontalAlignment="Left" Margin="10,127,0,0" TextWrapping="Wrap" Text="TextBlock" VerticalAlignment="Top" Height="116" Width="410">
<TextBlock.Background>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="Black" Offset="0"/>
<GradientStop Color="#FFA3A3A3"/>
</LinearGradientBrush>
</TextBlock.Background>
</TextBlock>
<TextBlock x:Name="textBlock1" HorizontalAlignment="Left" Margin="434,182,0,0" TextWrapping="Wrap" Text="TextBlock" VerticalAlignment="Top" RenderTransformOrigin="0.482,0.542" Height="27" Width="178" OpacityMask="White">
<TextBlock.Background>
<RadialGradientBrush>
<GradientStop Color="Black" Offset="0"/>
<GradientStop Color="#FFE0DFDF"/>
</RadialGradientBrush>
</TextBlock.Background>
</TextBlock>
<Label x:Name="label3" Content="Valid Until : " HorizontalAlignment="Left" Margin="346,11,0,0" VerticalAlignment="Top"/>
<CheckBox x:Name="checkBox" Content="Keep old password" HorizontalAlignment="Left" Margin="220,108,0,0" VerticalAlignment="Top"/>
<Button x:Name="button" Content="Apply" HorizontalAlignment="Left" Margin="435,215,0,0" VerticalAlignment="Top" Width="178" Height="29" BorderBrush="White" Background="#FFA6A5A5"/>
<ListBox x:Name="listBox" HorizontalAlignment="Left" Height="125" Margin="95,32,0,-0.2" VerticalAlignment="Top" Width="120" Visibility="Hidden" IsSynchronizedWithCurrentItem="True"/>
<TextBox x:Name="textBox" HorizontalAlignment="Left" Height="23" Margin="95,14,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="120" />
</Grid>
</TabItem>
<TabItem Header="Re-Activate Admin Account">
<Grid Background="#FFE5E5E5">
<Label x:Name="label4" Content="User : " HorizontalAlignment="Left" Margin="85,10,0,0" VerticalAlignment="Top"/>
<TextBox x:Name="textBox3" HorizontalAlignment="Left" Height="23" Margin="133,13,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="120"/>
<Calendar HorizontalAlignment="Left" Margin="420,10,0,0" VerticalAlignment="Top" Height="168" Width="188"/>
<Button x:Name="button1" Content="Button" HorizontalAlignment="Left" Margin="420,214,0,0" VerticalAlignment="Top" Width="193" Height="29"/>
</Grid>
</TabItem>
<TabItem Content="New User" Header="New User"/>
<TabItem Header="Unlock User"/>
<TabItem Header="New Extern User">
<Grid Background="#FFE5E5E5">
<TextBox x:Name="textBox4" HorizontalAlignment="Left" Height="23" Margin="111,14,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="120"/>
<TextBox x:Name="textBox5" HorizontalAlignment="Left" Height="23" Margin="111,49,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="120"/>
<TextBox x:Name="textBox6" HorizontalAlignment="Left" Height="23" Margin="111,88,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="120"/>
<TextBox x:Name="textBox7" HorizontalAlignment="Left" Height="23" Margin="111,127,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="120"/>
<TextBox x:Name="textBox8" HorizontalAlignment="Left" Height="23" Margin="111,167,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="120"/>
<Label x:Name="label5" Content="Firstname :" HorizontalAlignment="Left" Margin="36,10,0,0" VerticalAlignment="Top"/>
<Label x:Name="label6" Content="Lastname :" HorizontalAlignment="Left" Margin="36,45,0,0" VerticalAlignment="Top"/>
<Label x:Name="label7" Content="E-Mail-Address :" HorizontalAlignment="Left" Margin="6,85,0,0" VerticalAlignment="Top"/>
<Label x:Name="label8" Content="Manager :" HorizontalAlignment="Left" Margin="39,124,0,0" VerticalAlignment="Top"/>
<Label x:Name="label9" Content="Ticketnumber :" HorizontalAlignment="Left" Margin="15,163,0,0" VerticalAlignment="Top"/>
<TextBlock x:Name="textBlock2" HorizontalAlignment="Left" Margin="295,14,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Height="175" Width="318" Background="#FF323131" Foreground="White" Cursor="Wait"/>
<Button x:Name="button2" Content="Button" HorizontalAlignment="Left" Margin="503,212,0,0" VerticalAlignment="Top" Width="110" Height="31"/>
</Grid>
</TabItem>
</TabControl>
</Grid>
</Window>
"#
$inputXML = $inputXML -replace 'mc:Ignorable="d"','' -replace "x:N",'N' -replace '^<Win.*', '<Window'
[void][System.Reflection.Assembly]::LoadWithPartialName('presentationframework')
[xml]$XAML = $inputXML
#Read XAML
$reader=(New-Object System.Xml.XmlNodeReader $xaml)
try{
$Form=[Windows.Markup.XamlReader]::Load( $reader )
}
catch{
Write-Warning "Unable to parse XML, with error: $($Error[0])`n Ensure that there are NO SelectionChanged or TextChanged properties in your textboxes (PowerShell cannot process them)"
throw
}
#===========================================================================
# Load XAML Objects In PowerShell
#===========================================================================
$xaml.SelectNodes("//*[#Name]") | %{"trying item $($_.Name)";
try {Set-Variable -Name "WPF$($_.Name)" -Value $Form.FindName($_.Name) -ErrorAction Stop}
catch{throw}
}
Function Get-FormVariables{
if ($global:ReadmeDisplay -ne $true){Write-host "If you need to reference this display again, run Get-FormVariables" -ForegroundColor Yellow;$global:ReadmeDisplay=$true}
write-host "Found the following interactable elements from our form" -ForegroundColor Cyan
get-variable WPF*
}
Get-FormVariables
#===========================================================================
# Use this space to add code to the various form elements in your GUI
#===========================================================================
#setzt die Variablen auf bestimmte Objekte, wodurch das Verändern der Objekte sehr flexibel ist
$OutputBox = $Form.FindName('textBlock')
$InputBox = $Form.FindName('textBox')
$ListBox = $Form.FindName('listBox')
#Eventhandler
$InputBox.Add_TextChanged({
$input = $InputBox.Text
if($input.length -gt 3){
$ListBox.Visibility ="Visible"
$input = "*" + $input + "*"
$user = #(Get-ADUser -Filter ' Name -like $input ' | Select -ExpandProperty Name)
#debug $OutputBox.Text = ($user | ForEach {"{0}`r" -f $_})
$ListBox.itemsSource = $user
---> Here should be the eventhandler for clicking an item in the listbox <---
# $listuser = Get-ADUser -Filter ' Name -like $ListBox.SelectedItem '
# $OutputBox.Text = $ListBox.SelectedItem
}
})
$Form.ShowDialog()

Answer 1

The answer:
$ListBox.add_SelectionChanged({$OutputBox.Text = $ListBox.SelectedItem})
Personally I prefer creating special function with events and call it before $Form.ShowDialog(). Add as much events as you need. Example:
function event_handler
{
$textbox_name.add_TextChanged({$textbox_Login.Text = Construct-Login $textbox_name.Text $textbox_LastName.Text})
}
In this example when you type something to the textbox textbox_name, function Construct-Login is invoked and result is written to another textbox.
By the way, you don't need extra
$OutputBox = $Form.FindName('textBlock')
$ListBox = $Form.FindName('listBox')
since $xaml.SelectNodes does the thing for you. Just make sure you have unique names for all controls at your form.