Change content of 2 textboxes based on listbox selection - wpf

Question

I am creating a small tool which is split into 2 files:
Form.ps1 - GUI & Button Events
Main.ps1 - All functions
The form itself look likes the following:
When a user is entered and Find User is clicked, if there is only 1 result, then the username and approver are filled (approver is the users line manager) as follows:
However, if more than 1 result is returned, it will then create a listbox of the results.
The part I am struggling with is how to add the approver as well as the username using $listbox.SelectedItem
At the moment I can only get the username like the following example:
I am using the following AD Query to get the Name, Email, Manager and ManagersEmail:
$searchResult = Get-ADUser -Filter "givenName -like ""$Firstname"" -and sn -Like ""$Surname""" -Properties Name, Mail, Manager |
Where { $_.Enabled -eq $True} |
Select-Object Name, Mail, #{Name="ManagersEmail";Expression={(get-aduser -property mail $_.manager).mail}}
The variables $firstname and $surname are taken from the textbox using a split

Answer 1

You can use WPF's element binding feature
I have filled the ListBox1 with Items of string type, therfore it is binds directly no need to get the object's property.
Below is the sample XAML & Code.
XAML:-
<TextBox Text="{Binding ElementName=listbox1, Path=SelectedItem}"
HorizontalAlignment="Left" Height="24" Margin="164,100,0,0"
TextWrapping="Wrap" VerticalAlignment="Top" Width="120"/>
<ListBox x:Name="listbox1"
HorizontalAlignment="Left"
Height="100"
Margin="164,156,0,0"
VerticalAlignment="Top"
Width="100"/>
C#:- Code behind file.
listbox1.Items.Add("ABC");
listbox1.Items.Add("XyZ");
listbox1.Items.Add("123");
You can skip this C# part because you might already fill it by clicking on the Find User button.