c# - WPF Filter a ListBox

Question

I have a ListBox with binding to a list of strings. I want to filter the list when I enter text in a TextBox. How can I do it?

public void ListLoad()
{
    ElementList = new List<string>(); // creation a list of strings
    ElementList.Add("1"); // add a item of string
    ElementList.Add("2"); // add a item of string

    DataContext = this; // set the data context
}

I'm binding it in XAML with:

ItemsSource="{Binding ElementList}"

Answer 1

CollectionViewSource class can help here. As far as I can tell it has many capabilities to filter, sort and group collections.

ICollectionView view = CollectionViewSource.GetDefaultView(ElementList);
view.Filter = (o) => {return o;}//here is the lambda with your conditions to filter

When you don't need any filter just set view.Filter to null. Also check out this article on filtering