Question

This question deals with a dinky little Winforms GUI. Let it be known that I have basic knowledge of data bindings and INotifyPropertyChanged and use both in my ViewModels in WPF. But I don’t know Winforms. This is for a school assignment.

So I have a class that has a DisplayName property. I also have a ListBox whose Items are a sequence of instances of my class. I have pointed myListBox.DisplayMember = "DisplayName"; After changing a value in an instance of my class that will cause the DisplayName property to return a different value, how do I tell my ListBox to pull the DisplayName property again to refresh its value?

Answer 1

Doing it this way probably requires re-binding the listbox, loosing selectedIndex etc.

One workaround is to forget about the DisplayMember property and handle the Format event of the ListBox instead. Something like (from memory) :

 // untested
 e.Value = (e.Item as MyClass).DisplayValue;