CODEWITHSUNDEEP
c#wpfstringlistbox
John V Dole
John V Dole

Reputation: 321

Why isnt my listbox getting updated with new items when i add them?

I'm trying to add a new item to the listbox everytime I press the add button but for some reason it only adds the first one, and if I press it again, it doesnt add the second one.

How I am seeing the code right now is that I create a new list named _items and then I add what ever is in my textbox everytime I press the button then I update the ItemSource aswell.

How do I make it add a new item everytime I press the AddBtn?

List<string> _items = new List<string>();


private void addBtn_Click(object sender, RoutedEventArgs e)
{
    _items.Add(recipentTextbox.Text);
    recipientLb.ItemsSource = _items;
}

Upvotes: 0

Views: 46

Answers (2)

Peter
Peter

Reputation: 684

Try using an ObservableCollection<string> instead of List<string>. The ObservableCollection supports data binding, and will update the target property.

Upvotes: 2

15ee8f99-57ff-4f92-890c-b56153
15ee8f99-57ff-4f92-890c-b56153

Reputation: 37059

ObservableCollection<string> _items = new ObservableCollection<string>();

//  Or whatever your constructor is
public MainWindow()
{
    recipientLb.ItemsSource = _items;
}

private void addBtn_Click(object sender, RoutedEventArgs e)
{
    _items.Add(recipentTextbox.Text);
}

Upvotes: 0

Related Questions