WP8.1 Panoramaitem Viewbox选定的索引

Question

How can I get the selected index or item on WP8.1 from a ViewBox in a PanoramaItem? Here is my xaml and my c# code

XAML

<phone:PanoramaItem Orientation="Horizontal" Background="White">
                <!--Double wide Panorama with large image placeholders-->
                <Viewbox x:Name="Myitem" Height="800" Margin="0,-30,0,0" Width="912" >
                    <Border Height="800" Width="912">
                        <ScrollViewer Margin="0,0,0,177">
                            <StackPanel Margin="0,0,16,0" Orientation="Vertical" VerticalAlignment="Top" Height="1722">
                                <StackPanel HorizontalAlignment="Left" Orientation="Horizontal">
                                    <Border Height="100" Width="100" Margin="12,0,0,0">
                                        <Border.Background>
                                            <ImageBrush Stretch="Fill" ImageSource="Assets/Tiles/stib-pic0.gif"/>
                                        </Border.Background>
                                    </Border>
                                </StackPanel>
                                <StackPanel HorizontalAlignment="Left" Orientation="Horizontal" Margin="0,12,0,0">
                                    <Border Height="100" Width="100" Margin="12,0,0,0" Tap="Border_Tap">
                                        <Border.Background>
                                            <ImageBrush Stretch="Fill" ImageSource="Assets/Tiles/stib-pic1.gif"/>
                                        </Border.Background>
                                    </Border>
                                    <Border Height="100" Width="100" Margin="12,0,0,0">
                                        <Border.Background>
                                            <ImageBrush Stretch="Fill" ImageSource="Assets/Tiles/stib-pic2.gif"/>
                                        </Border.Background>
                                    </Border>
                                    <Border Height="100" Width="100" Margin="12,0,0,0">
                                        <Border.Background>
                                            <ImageBrush Stretch="Fill" ImageSource="Assets/Tiles/stib-pic3.gif"/>
                                        </Border.Background>
                                    </Border>
                                    <Border Height="100" Width="100" Margin="12,0,0,0">
                                        <Border.Background>
                                            <ImageBrush Stretch="Fill" ImageSource="Assets/Tiles/stib-pic4.gif"/>
                                        </Border.Background>
                                    </Border>
                                </StackPanel>
                            </StackPanel>
                        </ScrollViewer>
                    </Border>
                </Viewbox>
            </phone:PanoramaItem>

C# Tap event

private void Border_Tap(object sender, System.Windows.Input.GestureEventArgs e)
        {

            MessageBox.Show("Tapped!: " + "(number) item");
        }

I could find some tips on internet but they were all about LongListSelector

Answer 1

For which control do you want to get the selected item? If it is the Panorama, then you can give a name to the Panorama control containing the PanoramaItem and use Panorama.SelectedIndex property.

I don't any other control on the posted XAML that has a notion of a selected item...

Answer 2

first of all you will have to provide header name of panorama item to easily get the selected header. and then call this snippet on panorama selection changed event.

var selectedItem = (PanoramaItem)(sender as Panorama).SelectedItem;
string item=selectedItem.Header.ToString();