Comments on: How do I bind the items of a ComboBox? How do I get a ComboBoxItem from a data bound ComboBox?

By: kontrol

kontrol — Wed, 17 Feb 2010 16:37:05 +0000

This explains alot of my problems, thank you. IsSelected="{Binding Path=IsCorrect}" doesn’t work for ComboBox but works for ListBox, now I know why. And now for a work around.

By: Geoff

Geoff — Wed, 25 Nov 2009 20:11:28 +0000

Thanks! That works very nicely.

By: Bea

Bea — Fri, 20 Nov 2009 19:31:03 +0000

Hi Geoff, I wonder if using a CompositeCollection would solve your problem. A CompositeCollection allows you to add a collection and individual items to an ItemsSource, all at the same time. You can read more about it in the MSDN documentation. Bea

By: Geoff

Geoff — Tue, 21 Jul 2009 15:44:14 +0000

I have a ItemsSource that is an ObservableCollection for my ComboBox, and I set SelectedItem to a field in another object. I would like the user to be able to select empty to specify they want the field set to null, but the ComboBox always seems to only display the items in the ObservableCollection.

Any thoughts on how to add the empty item?

I think I could have a separate ObservableCollection dependency property on my control and populate that from the real ObservableCollection + the empty item, but that seems like working around data binding rather than with it.

By: Bea

Bea — Thu, 29 Sep 2005 17:57:08 +0000

Hi Pavan,

I can’t repro that behavior – if I comment out the “comboBox.IsDropDownOpen = true;” line, I get null for the ComboBoxItems, as expected. Maybe you opened the ComboBox manually first to select an item (causing the generation of the items)?

Let me know if this is the case.

Bea

By: Pavan Podila

Pavan Podila — Wed, 28 Sep 2005 17:27:31 +0000

I was trying out your example on the Feb CTP bits and it looks like the API is consistent for both ListBox and ComboBox. No special care (opening/closing the dropdown) needs to be taken for the ComboBox when using the Items property.