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Sorting Two Combo Boxes Differently in WPF

Answer 1

A:

How to sort listbox and comboboxes in WPF http://www.kudzuworld.com/Blogs/Tech/20070815A.en.aspx

Since WPF does not provide a "Sort Order" property for its combo boxes, you need two different collections.

In the link I provided above, a commenter posted the following method using a ListCollectionView object to get a custom sort. This allows a single collection from your data source to be used, while adding an additional layer of collections for sorting:

// Using System.ComponentModel;
ListCollectionView view = new ListCollectionView (channel.Members);
view.SortDescriptions.Add(new SortDescription("lastName", ListSortDirection.Ascending);
view.SortDescriptions.Add(new SortDescription("firstName", ListSortDirection.Ascending); 
view.CustomSort = new IComparerImplementation; //Do this if you want a custom sort;
view.Refresh();

Robert Harvey 2009-09-22 18:10:18

The correct way would be using a CollectionView over the ItemsSource. You could have multiple CollectionView, each with different sort descriptions, over a single source,

decasteljau 2009-09-23 12:09:43

Why is that correct? Does it prevent a second database hit?

Robert Harvey 2009-09-23 14:41:49

@Robert Harvey: Collection stays the same, read once from database or whatever. There would be two CollectionView client-side objects used as ItemsSource as an extra layer between presentation and data collection.

Stanislav Kniazev 2009-09-23 15:10:53

What I did originally (to have two distinct item lists) is that I hit the databse only once, but I made a copy of my first one. It worked out great.

David Brunelle 2009-09-24 15:37:06

Answer 2

+2 A:

CollectionView is made just for that: http://bea.stollnitz.com/blog/?p=38

Stanislav Kniazev 2009-09-23 10:42:06

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Sorting Two Combo Boxes Differently in WPF

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