Indirect binding to child collections in XAML

Question

Hi folks,

I am currently using a Linq template with SubSonic3 to create my models. I have a simple Member class, which has a collection of Notes. A Note class has a PublishedDate and Title properties.

I have a UserControl which has a collection of Members for its DataContext. There are two ListBoxes and a bunch of TextBoxes and other controls on it. The first ListBox (membersList) gets its ItemsSource from the UserControl DataContext and it displays a few Member properties in each item. I would like the second ListBox (notesList) to display the Notes collection of the Member selected in the first ListBox.

So far on notesList I have:

<ListBox ... ItemsSource="{Binding Notes}"...>
    <DataTemplate>
        <TextBox Text="{Binding Title}"/>
    </DataTemplate>

It partially works. When I selected a Member which has Note items there is the correct number of items in notesListBox but this is only visible in the alternating row colours - nothing else! The DataTemplate fails to render the Title of the Note. Basically all the visual styles in the ListBox and ListBoxItem works - alternating colours, selection border, mouseover, etc. but the content is not shown. I have a feeling the problem is my Binding syntax but I can't figure out what's wrong.

Any suggestions would be greatly appreciated.

Cheers, Dany.

Answer 1

Make sure your template includes a ContentPresenter. It sounds like you may have left this out when you templated your list box.

Leaving this out could lead to the behavior you're experiencing - full template, but no "content", since there's no place for it to place the actual items that should go in each list box item.