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POCan't Access 2+ Child of Databound Pivot
 

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  1. POCan't Access 2+ Child of Databound Pivot
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    <p>Ok, this is my first post here, so I'm not sure how detailed I need to be and I'm not the best at describing things, but I'll give it a shot.</p> <p>So on the main page of my App, when a user click on a textblock it sends them to the next page which is a dynamic pivot page:</p> <pre><code>&lt;Grid x:Name="LayoutRoot" Background="Transparent" DataContext="{Binding Products}"&gt; &lt;!--Pivot Control--&gt; &lt;controls:Pivot x:Name="Pivot" Title="{Binding name}" ItemsSource="{Binding pivots}"&gt; &lt;controls:Pivot.HeaderTemplate&gt; &lt;DataTemplate&gt; &lt;TextBlock Text="{Binding title}" /&gt; &lt;/DataTemplate&gt; &lt;/controls:Pivot.HeaderTemplate&gt; &lt;controls:Pivot.ItemTemplate&gt; &lt;DataTemplate&gt; &lt;ListBox Margin="0,0,-12,0" ItemsSource="{Binding partners}"&gt; &lt;ListBox.ItemTemplate&gt; &lt;DataTemplate&gt; &lt;StackPanel Margin="0,0,0,17" Width="432" Height="58"&gt; &lt;TextBlock Text="{Binding name}" TextWrapping="Wrap" Tap="showDetails" Style="{StaticResource PhoneTextExtraLargeStyle}"/&gt; &lt;/StackPanel&gt; &lt;/DataTemplate&gt; &lt;/ListBox.ItemTemplate&gt; &lt;/ListBox&gt; &lt;/DataTemplate&gt; &lt;/controls:Pivot.ItemTemplate&gt; &lt;/controls:Pivot&gt; &lt;/Grid&gt; </code></pre> <p>It passes a parameter that specifies what DataContext should be used on the page, and which pivot should be selected. OnNavigation, it then parse those parameters:</p> <pre><code>protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e) { base.OnNavigatedTo(e); string selectedType = this.NavigationContext.QueryString["type"]; string selectedPivot = this.NavigationContext.QueryString["pivot"]; int selectedIndex = 0; switch (selectedType) { case "product": LayoutRoot.DataContext = App.ViewModel.Products; selectedIndex = Array.IndexOf(App.ViewModel.ProductTypes, selectedPivot); break; case "service": LayoutRoot.DataContext = App.ViewModel.Services; selectedIndex = Array.IndexOf(App.ViewModel.ServiceTypes, selectedPivot); break; default: LayoutRoot.DataContext = App.ViewModel.Products; break; } Pivot.SelectedIndex = selectedIndex; PivotItem pivotItem = Pivot.ItemContainerGenerator.ContainerFromItem(Pivot.SelectedItem) as PivotItem; this.selectedList = FindFirstElementInVisualTree&lt;ListBox&gt;(pivotItem); } </code></pre> <p>The <a href="http://windowsphonegeek.com/tips/how-to-access-a-control-placed-inside-listbox-itemtemplate-in-wp7" rel="nofollow">FindFirstElementInVisualTree</a> is from <a href="http://windowsphonegeek.com/tips/how-to-access-a-control-placed-inside-listbox-itemtemplate-in-wp7" rel="nofollow">here</a></p> <p><strong>So here's my problem:</strong> This all works fine when I select the first dataset and the first pivot, otherwise it says that pivotItem doesn't have any children and throws an error.</p> <p>Any Idea's what I can do to get around this? Maybe I'm going about this all wrong. If you need more details, just let me know.</p>
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