Sorting in window datacontext in WPF

Question

Another question related to this one.

I have a List that is the datacontext of my MainWindow. I use that list to populate a ListBox and a ComboBox. When I sort the items, both the ComboBox and the ListView get updated all right. But now I need the combobox to be sorted in a different way than the ListView. I. E. If the object were a Person, in the ComboBox, I'd need to sort them by LastName, but in the ListView, by birthday. How can I achieve this?

Thanks!

Answer 1

Use CollectionViewSources for each of the separate orderings you want:

<UserControl.Resources>
    <CollectionViewSource x:Key="ComboBoxSource" Source="{Binding YourUnderlyingCollection}">
        <CollectionViewSource.SortDescriptions>
            <scm:SortDescription PropertyName="SomeProperty"/>
        </CollectionViewSource.SortDescriptions>
    </CollectionViewSource>

    <CollectionViewSource x:Key="ListBoxSource" Source="{Binding YourUnderlyingCollection}">
        <CollectionViewSource.SortDescriptions>
            <scm:SortDescription PropertyName="SomeOtherProperty"/>
        </CollectionViewSource.SortDescriptions>
    </CollectionViewSource>
</UserControl.Resources>

<ComboBox ItemsSource="{Binding Source={StaticResource ComboBoxSource}}"/>

<ListBox ItemsSource="{Binding Source={StaticResource ListBoxSource}}"/>

HTH, Kent