title: get Values of one listbox item selected
body: <p>I'm Coding windows 10 universal app.
  I Have a List box:</p>
  
  <pre><code>&lt;ListBox.ItemTemplate&gt;
      &lt;DataTemplate&gt;
          &lt;StackPanel Orientation="Horizontal"&gt;
              &lt;TextBlock FontFamily="Segoe UI Symbol" Text="&amp;#x26FD;" FontSize="25"/&gt;
              &lt;StackPanel Orientation="Vertical"&gt;
                  &lt;TextBlock Name="txtDate" Text="{Binding Date}" FontSize="15" Margin="20,0,0,0"/&gt;
                  &lt;TextBlock Name="txtDitance" Text="{Binding Distance}" FontSize="15" Margin="20,5,0,0"/&gt;
              &lt;/StackPanel&gt;
              &lt;TextBlock Name="txtPrice" Text="{Binding Price}" FontSize="15" Margin="30,0,0,0"/&gt;
          &lt;/StackPanel&gt;
      &lt;/DataTemplate&gt;
  &lt;/ListBox.ItemTemplate&gt;
  </code></pre>
  
  <p>When I click an item of the listbox, how do I can get the txtDate Text Value of that item?
  I need get txtDate Text Value of Selected Item as a String.</p>