How can i change listbox itemssource dinamically?

[Vagos]

Hello dear C# coders. Picture this

.It's a simple practice GUI application that handles a library needs. I have a List of members, list for loans that each member does, I also have a "back up" loans list like global, and on MainWindow constructor it's like

 ... lstLoans.ItemsSource = loans; 

.
What I want is, the lstLoans.ItemsSource to be equal to member.Loans (each members list of loans done by this member), meaning, I want only this specific members Loans to appear each time, and not all loans done so far that got from loans (global list).
Is there any way to change dinamically I guess, the listBox items source, or just a way to show a specific members Loans, any other ideas beside list boxes.
Thanks in advance.

[GaryTexmo]

I don't know WPF that well so the best I can offer is a few educated guesses, but lets give it a try.

What are your loan list objects? I'd imagine they're lists of some kind, right?

You're asking if you can change the items dynamically... have you tried adding/removing items based on some GUI input? I'm not entirely sure what your overall goal is here... do you want to keep a master list of all the loans you had originally, but then modify that while preserving the original list? Or do you want something else?

[Vagos]

Loan is a class, containing information about a loan, done by a member. Here is some code from the Mainwindow :

public partial class MainWindow : Window
    {
        List<Member> members;
        Member member;
        ObservableCollection<Loan> loans;
        //CollectionViewSource loans;
 
        public MainWindow()
        {
            InitializeComponent();
            members = GetMembers();
 
            //member = GetMember(textBox1.Text); 
            loans = new ObservableCollection<Loan>();
            List<Title> titles = GetAllTitles();
 
 
            //DataContext = member;
            lstTitles.ItemsSource = titles;
            lstLoans.ItemsSource = loans;
        }

.User enter's the members code to the textbox then press the search button so he gets the secific members info. Pressing the newLoan button, down to the loans Listbox, the loan is added nornally, so you can see 'this' member loans. But, when you enter a new member code to the textbox and press Search button, you can still see the previous members loans, and also 'this' members loans done so far.
Any way to show only 'this' member loans at any time?