WPF: Bind Collection with Collection to a ListBox with groups

Question

sometimes WPF is too complex for me. I\'ve got my \"Window1\" holding a collection of \"Group\"s. \"Group\" is a class with a collection of \"Person\"s. In the end this should b

Answer 1

If you have a copy of Programming WPF, jump to Page 221. If not I'll summarize (in my inept sort of way)

First you don't need to manually group the Person objects.

If each Person object has a Group property,

People people = // retrieve the List somehow
ICollectionView view = CollectionViewSource.GetDefaultView(people);
view.GroupDescriptions.Add( new PropertyGroupDescription("Group") );

All controls that derive from ItemsControl can display grouped items, so

// the XAML

  
    
  

You can also define a custom GroupStyle and specify the GroupStyle.HeaderTemplate to define a new DataTemplate that shows custom attributes like 'some PropertyValue (Count)' - Bind the one TextBlock to {Binding SomeProperty} and the other to {Binding ItemCount}

HTH