Question

So I’m trying to learn Silverlight so I’ve built a simple demo app that pulls my home feed from FriendFeed and displays the items in a list.

I’ve got a listbox defined:

    <ListBox x:Name="lstItems" Margin="5,61,5,5" Grid.Row="1">            
        <ListBox.ItemTemplate>
            <DataTemplate>
                <StackPanel Margin="8,8,43,8">
                    <TextBlock Text="{Binding Title}" />
                </StackPanel>
            </DataTemplate>
        </ListBox.ItemTemplate>            
    </ListBox>

which is being populated by a web service call

private void LoginButton_Click(object sender, RoutedEventArgs e)
{
    FriendFeedServiceClient client = new FriendFeedServiceClient();
    client.GetHomeCompleted += new EventHandler<GetHomeCompletedEventArgs>(client_GetHomeCompleted);
    client.GetHomeAsync(FfUsername.Text, FfApiKey.Password);
}

void client_GetHomeCompleted(object sender, GetHomeCompletedEventArgs e)
{
    lstItems.DataContext = e.Result;
}

The FriendFeedServiceClient is doing a call to a local webservice that proxies a request to the actual FriendFeed webservice.

The service call works fine, the items are returned, if I debug the call the lstItems.DataContext property is populated with a list of items with data in them, but the list doesn’t display anything, it’s always blank. Have I missed something?

Answer 1

You need to bind your Listbox, something like this

<ListBox x:Name="lstItems" Margin="5,61,5,5" Grid.Row="1" ItemsSource="{Binding}">

and then the TextBlock’s binding to the path Title should work.

EDIT: You are setting the DataContext, which kind of gives a hint that you are probably binding a custom object, have you tried casting the e.GetResult to your custom object,
something to the likes of

YourCustomObject obj = (YourCustomObject) e.GetResult;
lstItems.DataContext = obj;

HTH