title: Reach a TextBlock from a specific ListViewItem from the ListView in Windows Phone 8.1 XAML programmatically
body: <p>I am a new developer on Windows Phone 8.1, I am try to reach a specific ListView item from the ListView collection and be able to color it or color the TextBock inside of it, But I can't reach the item or reach any of items inside of ListView, Please take a look for my below code :</p>
  
  <pre><code>    protected async override void OnNavigatedTo(NavigationEventArgs e)
      {
                     SQLiteRT db1 = new SQLiteRT();
              var db_connection = await db1.Connection("MyDB.sqlite");
  
              List&lt;MyTBL&gt; t_list = db1.GetTable("SELECT * FROM MyTBL LIMIT 4 ORDER BY RANDOM() ;");
              db_connection.Close();
  
            LV_Options.ItemsSource = t_list;
      }
   // my List View called LV_Options
  private void LV_Options_SelectionChanged(object sender, SelectionChangedEventArgs e)
  {
       ListView lv1 = sender as ListView;
       if (lv1 == null)
            return;
  
       MyTBL wrd = lv1.SelectedItem as MyTBL;
       if (wrd == null)
           return;
  
       TextBlock tb = lv1.FindName("TB_AMean1") as TextBlock;
       tb.FontSize = 17; // here I got debug error (it not worked !!!!!!!)
  
       var item =  LV_Options.Items.ElementAt(3); // this seems not work also !!!!
       item.BackColor = Color.LightSteelBlue; 
  
  }
  </code></pre>
  
  <p>As you can see above, I tried to reach a specific item by LV_Options.Items.ElementAt(3) but it doesn't work! I also tried to reach the TextBlock from the selected List view item, but also not worked !</p>
  
  <p>(Updated)
  XAML code :   </p>
  
  <pre><code>&lt;!-- Title Panel --&gt;
          &lt;StackPanel Grid.Row="0" Margin="19,0,0,0"&gt;
              &lt;TextBlock Name="TB_Rslt" Text="Here result of your answer" Style="{ThemeResource TitleTextBlockStyle}" Margin="0,12,0,0"/&gt;
              &lt;TextBlock Text="page title" Margin="0,-6.5,0,26.5" Style="{ThemeResource HeaderTextBlockStyle}" CharacterSpacing="{ThemeResource PivotHeaderItemCharacterSpacing}"/&gt;
          &lt;/StackPanel&gt;
  
          &lt;!--TODO: Content should be placed within the following grid--&gt;
          &lt;Grid Grid.Row="1" x:Name="ContentRoot" Margin="19,10,19,15"&gt;
              &lt;Grid.RowDefinitions&gt;
                  &lt;RowDefinition Height="Auto"/&gt;
                  &lt;RowDefinition Height="*"/&gt;
              &lt;/Grid.RowDefinitions&gt;
              &lt;TextBlock Name="TB_Question" Text="Choose Answer " Margin="0,0,25,0" HorizontalAlignment="Right" FontWeight="Bold" FontSize="22" FontFamily="Verdana" RenderTransformOrigin="0.5,0.5" /&gt;
              &lt;TextBlock Name="TB_EnWord" Text="" Margin="90,0,15,0" HorizontalAlignment="Left" FontWeight="Bold" FontSize="22" FontFamily="Verdana" RenderTransformOrigin="0.5,0.5" TextAlignment="Right" /&gt;
              &lt;StackPanel Grid.Row="1" Margin="5,22,0,0"&gt;
                  &lt;ListView Name="LV_Options" SelectionChanged="LV_Options_SelectionChanged"&gt;
                      &lt;ListView.ItemTemplate&gt;
                          &lt;DataTemplate&gt;
                              &lt;Grid Margin="6"&gt;
                         &lt;StackPanel VerticalAlignment="Top" Margin="10,0,0,0"&gt;
                   &lt;TextBlock Name="TB_AMean1" Text="{Binding AMean1}" TextWrapping="Wrap"/&gt;
                                  &lt;/StackPanel&gt;
                              &lt;/Grid&gt;
                          &lt;/DataTemplate&gt;
                      &lt;/ListView.ItemTemplate&gt;
  
                  &lt;/ListView&gt;
              &lt;/StackPanel&gt;
              &lt;Button Name="Btn_Answer" Content="Ansewr" HorizontalAlignment="Left" Grid.Row="1" VerticalAlignment="Bottom" Click="Btn_Answer_Click"/&gt;
  </code></pre>
  
  <p>My application is a quiz application that offer 4 choices/options as answers for each question, and when user select a true answer, I want to highlight the true answer(true choice) by make its background to green, and if the user selected wrong answer/option I want to make the background of that answer (a specific List View item) with red.</p>
  
  <p>Any help please ?</p>