Databound Listbox SelectedItem

[SLH]

I have a listbox bound to a datasource, which gets updated.

When it does the selected index remains the same. Meaning, that the selected item is different, since the order/number of items could change as the datasource is updated.

Is there any way round this?

[jmcilhinney]

Exactly what is the control bound to? Can you provide some example code we can execute to demonstrate the issue?

[SLH]

It's bound to a class derived from BindingList of custom objects, which only every has items added or removed (the list isn't cleared and repopulated).

All i did was add AddRange / RemoveRange functions as below:

public void AddRange(IEnumerable<T> Items, IEqualityComparer<T> Comparer)
        {
            foreach (T Item in Items)
            {
                if (!this.Items.Contains(Item, Comparer))
                    this.Items.Add(Item);
            }
            OnListChanged(new ListChangedEventArgs(ListChangedType.Reset, 0));
        }

I may have answered my own question. Is this issue caused by me using the Reset listchangedtype enumeration value?
I used that figuring no others were appropriate since it wasn't just one index that was changing.