<Grid x:Name="LayoutRoot" Background="White"><phone:Pivot x:Name="imagePivot" HorizontalAlignment="Left" VerticalAlignment="Top" Height="800" Width="480" SelectionChanged="imagePanel_SelectionChanged_1"><phone:PivotItem Margin="0"><Image Source="/Assets/start_01.jpg"></Image></phone:PivotItem><phone:PivotItem Margin="0"><Image Source="/Assets/start_02.jpg"></Image></phone:PivotItem><phone:PivotItem Margin="0"><Image Source="/Assets/start_03.jpg"></Image></phone:PivotItem><phone:PivotItem Margin="0"><Image Source="/Assets/start_04.jpg"></Image></phone:PivotItem></phone:Pivot><StackPanel x:Name="ellipsePanel" VerticalAlignment="Bottom" Orientation="Horizontal" HorizontalAlignment="Center"><Ellipse Width="10" Height="10" VerticalAlignment="Bottom" Margin="24" Stroke="#FFBDB8B4"></Ellipse><Ellipse Width="10" Height="10" VerticalAlignment="Bottom" Margin="24" Stroke="#FFBDB8B4"></Ellipse><Ellipse Width="10" Height="10" VerticalAlignment="Bottom" Margin="24" Stroke="#FFBDB8B4"></Ellipse><Ellipse Width="10" Height="10" VerticalAlignment="Bottom" Margin="24" Stroke="#FFBDB8B4"></Ellipse></StackPanel></Grid>

 public partial class MainPage : PhoneApplicationPage{private List<Ellipse> ellipses;private bool phoneLoaded = false;// 构造函数public MainPage(){InitializeComponent();ellipses = new List<Ellipse>();}private void PhoneApplicationPage_Loaded_1(object sender, RoutedEventArgs e){List<UIElement> ellipseList = this.ellipsePanel.Children.ToList();foreach (Ellipse item in ellipseList){if (item.GetType() == typeof(Ellipse)){ellipses.Add(item);}}EllipseFill(0);phoneLoaded = true;}private void EllipseFill(int index){foreach (Ellipse item in ellipses){item.Fill = null;}ellipses[index].Fill = new SolidColorBrush(Color.FromArgb(255, 189, 184, 180));}private void imagePanel_SelectionChanged_1(object sender, SelectionChangedEventArgs e){if (phoneLoaded){EllipseFill(this.imagePivot.SelectedIndex);}}}