在StackPanel中加入新的stackpanel，包含图片和文字

private async void Button_Click(object sender, RoutedEventArgs e)
        {
            List<ServiceReference1.Pic> jokes = await this.getFileContentAsync();
            imagepoll.Orientation = Orientation.Vertical;
            imagepoll.Width = 800;
            foreach (ServiceReference1.Pic pic in jokes)
            {
                StackPanel panel = new StackPanel();
                panel.Orientation = Orientation.Horizontal;

                ImageBrush imageBrush = new ImageBrush();
                imageBrush.ImageSource = new BitmapImage(new Uri(pic.URL));
                Image image = new Image();
                image.Source = imageBrush.ImageSource;
                image.Margin = new Thickness(0, 0, 10, 0);
                image.Width = 100;

                panel.Children.Add(image);

                TextBlock block = new TextBlock();
                block.Text = pic.Name;

                panel.Children.Add(block);
                this.imagepoll.Children.Add(panel);
                panel.PointerMoved += Mource_Move;
            }
        }
        private async void Mource_Move(object sender, RoutedEventArgs e)
        {
            StackPanel panel = (StackPanel)sender;
            TextBlock block = (TextBlock)panel.Children[1];
            string message = block.Text;
            MessageDialog dialog = new MessageDialog(message);
            dialog.ShowAsync();
        }