How can i display ComboboxSelectedItem in Textbox - powershell

Question

I create a GUI with Visual Studio and import the XAML code in Powershell and i have a problem to display in textbox a value from one of 5 combobox selected item.
I learn by myself and i really love it but i dont have the good method for debbug my code alone,
anybody can have a time and a knowledge for help me please ?
I want to display in textbox ($TxtBox) the selected item (or value) from CboPL or CboTG or CboSB....
with powershell.
This is my XAML code beetwen here string in powershell :
<Window x:Name="Main" x:Class="Printers_Ordi.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:Printers_Ordi"
mc:Ignorable="d"
Title="Printers-Ordi" Height="450" Width="728.471">
<Grid x:Name="Wall">
<Grid.Background>
<ImageBrush ImageSource="C:/Users/admsb160365/Desktop/scripts Shell/Imprimantes GHT/Wall.png"/>
</Grid.Background>
<Label x:Name="LabelTitre" Content="Printers-Ordi" HorizontalAlignment="Left" Margin="74,25,0,0" VerticalAlignment="Top" FontFamily="Yu Gothic UI Semibold" FontSize="24" RenderTransformOrigin="0.503,0.76" Height="42" Width="164" Foreground="#FF1346CD"/>
<ComboBox x:Name="CboComputer" HorizontalAlignment="Left" Margin="74,82,0,0" VerticalAlignment="Top" Width="164" FontSize="16" Height="31" IsEditable="True" IsReadOnly="True" Text="Ordinateur"/>
<ComboBox x:Name="CboSites" HorizontalAlignment="Left" Margin="74,118,0,0" VerticalAlignment="Top" Width="164" Height="31" FontSize="16" IsEditable="True" IsReadOnly="True" Text="Sites">
<ComboBox x:Name="CboPL" HorizontalAlignment="Left" VerticalAlignment="Top" Width="154" FontSize="16" IsEditable="True" IsReadOnly="True" Text="Paimpol"/>
<ComboBox x:Name="CboGP" HorizontalAlignment="Left" VerticalAlignment="Top" Width="154" FontSize="16" IsEditable="True" IsReadOnly="True" Text="Guingamp"/>
<ComboBox x:Name="CboSB" HorizontalAlignment="Left" VerticalAlignment="Top" Width="154" FontSize="16" IsEditable="True" IsReadOnly="True" Text="SaintBrieuc"/>
<ComboBox x:Name="CboLN" HorizontalAlignment="Left" VerticalAlignment="Top" Width="154" FontSize="16" IsEditable="True" IsReadOnly="True" Text="Lannion"/>
<ComboBox x:Name="CboTG" HorizontalAlignment="Left" VerticalAlignment="Top" Width="154" FontSize="16" IsEditable="True" IsReadOnly="True" Text="Treguier"/>
</ComboBox>
Thanks by advance for your patience and support ;-)

Answer 1

Continuing from my comments. There are a few ways to deal with your use case. Here is a simple example using Winform. Ultimately, it's still collecting/assigning text from one element(s)/or code results to another.
Add-Type -AssemblyName System.Drawing
$ComboBox = New-Object System.Windows.Forms.ComboBox
$ComboBox.Location = New-Object System.Drawing.Point(10,10)
$ComboBox.Items.AddRange(#('One','Two'))
$RichTextBox = New-Object System.Windows.Forms.RichTextBox
$RichTextBox.Location = New-Object System.Drawing.Point(10,40)
$Form = New-Object System.Windows.Forms.Form
$Form.Controls.Add($ComboBox)
$Form.Controls.Add($RichTextBox)
$ComboBox.Add_TextChanged({
switch($ComboBox.Text){
'One' {$RichTextBox.Text = 'This is one'}
'Two' {$RichTextBox.Text = 'This is two'}
}
})
$Form.ShowDialog()
An example using WPF
[void][System.Reflection.Assembly]::LoadWithPartialName('presentationframework')
[xml]$XAML = #'
<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"
Title="PowerShell Form" Height="310" Width="350" ResizeMode="NoResize">
<Grid Margin="0,0,0,0">
<GroupBox Header="General" HorizontalAlignment="Left" Height="225" Margin="10,10,0,0" VerticalAlignment="Top" Width="320">
<Grid HorizontalAlignment="Left" Height="206" Margin="0,0,0,0" VerticalAlignment="Top" Width="320">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="60*"/>
<ColumnDefinition Width="250*"/>
</Grid.ColumnDefinitions>
<Label Content="Field #1:" HorizontalAlignment="Left" Margin="0,7,0,0" VerticalAlignment="Top" Height="26" Width="93"/>
<Label Content="Field #2:" HorizontalAlignment="Left" Margin="0,35,0,0" VerticalAlignment="Top" Height="26" Width="93"/>
<Label Content="Field #3:" HorizontalAlignment="Left" Margin="0,65,0,0" VerticalAlignment="Top" Height="26" Width="93"/>
<TextBox Name="f1" HorizontalAlignment="Left" Height="23" Margin="10,10,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="229" Grid.Column="1"/>
<ComboBox Name="f2" HorizontalAlignment="Left" Height="23" Margin="10,38,0,0" VerticalAlignment="Top" Width="229" Grid.Column="1">
<ListBoxItem>Test 1</ListBoxItem>
<ListBoxItem>Test 2</ListBoxItem>
<ListBoxItem>Test 3</ListBoxItem>
</ComboBox>
<TextBox Name="f3" HorizontalAlignment="Left" Height="23" Margin="10,66,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="229" Grid.Column="1"/>
</Grid>
</GroupBox>
<Button Name="Clear" Content="Clear Form" HorizontalAlignment="Left" Margin="10,240,0,0" VerticalAlignment="Top" Width="90" Height="30" RenderTransformOrigin="0.522,0.733"/>
<Button Name="Submit" Content="Submit" Margin="234,240,12,0" VerticalAlignment="Top" Height="30"/>
</Grid>
</Window>
'#
$reader = (New-Object System.Xml.XmlNodeReader $xaml)
try{$Form = [Windows.Markup.XamlReader]::Load( $reader )}
catch
{
Write-Host 'Unable to load Windows.Markup.XamlReader.'
break
}
$xaml.SelectNodes('//*[#Name]') |
ForEach-Object {Set-Variable -Name ($_.Name) -Value $Form.FindName($_.Name)}
$Form.Add_Loaded({
if (Test-Path -Path '.\ComboBox.selection')
{
$cbSelection = Get-Content '.\ComboBox.selection'
[int]$cbSelectionInt = -1
[void][int]::TryParse($cbSelection,[ref]$cbSelectionInt)
if ($cbSelectionInt -ge 0)
{$f2.SelectedIndex = $cbSelectionInt}
}
})
$Clear.Add_Click({
$fields = #('f1','f2','f3')
foreach ($field in $fields)
{
$control = $Form.FindName($field)
switch ($control.GetType()) {
'System.Windows.Controls.TextBox' {$control.Clear()}
'System.Windows.Controls.ComboBox' {$control.SelectedIndex = -1}
DEFAULT {'unknown control'}
}
}
})
$f2.add_SelectionChanged({
param($sender,$args)
$f3.Text = ($($sender.SelectedValue) -replace '.*:\s+')
})
$Form.ShowDialog()