How to bind a list of item in CollectionViewSource?

Question

I\'m stuck in this problem for days. Never found a solution. So I\'ve a list of items called Country, in this list I\'ve also another list of items called Lea

Answer 1

I went by the output you want. Please check and tell if this is what you want.

public partial class WinExpander : Window
{
    public WinExpander()
    {
        InitializeComponent();

        this.DataContext = new ViewModel();
    }
} 

public class ViewModel
    {
        public List Countries { get; set; }
        public ViewModel()
        {
            Countries = new List();
        }
    }

public class Country
    {
        public string Name { get; set; }
        public List Leagues { get; set; }

        public Country()
        {
            Leagues = new List();
        }
    }

    public class League
    {
        public string Name { get; set; }
        public List Matches { get; set; }

        public League()
        {
            Matches = new List();
        }
    }

    public class Match
    {
        public string Name { get; set; }
    }

XAML

    

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You can replace any of the ItemsControl with ListBox too.

Another solution using GroupStyle and ListView according to user requirements.

     
         
     

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