ComboBox Items Empty but DataSource Full

Question

After binding a list to combobox, its dataSource.Count is 5 but, combobox item count is 0. how can it be?

I\'m used to Web programming and this is in Windows Forms. So

Answer 1

If you'd expand DataSource items in debuger, you'd probably notice that 1st element on list is null. That is why DataSource does not render ComboBox Items. Removing null items from the list should do all the work;

Answer 2

I had the same problem, but in my case it was caused by calling

combobox.Sorted = True

in InitializeComponent. I guess that call initializes Items, which then prevents the assignment to DataSource from updating it (Items).

Answer 3

After adding ddl.BindingContext = new BindingContext(); before the BindingSource assignment, everything worked fine.