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POFind control inside Listbox.ItemTemplate (WPF C#)
 

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  1. POFind control inside Listbox.ItemTemplate (WPF C#)
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    <p>I have some problems finding the right <code>TextBlock</code> control inside a <code>StackPanel</code>. My markup:</p> <pre><code>&lt;ListBox Name="lstTimeline" ItemContainerStyle="{StaticResource TwItemStyle}" MouseDoubleClick="lstTimeline_MouseDoubleClick"&gt; &lt;ListBox.ItemTemplate&gt; &lt;DataTemplate&gt; &lt;DockPanel MaxWidth="{Binding ElementName=lstTimeline, Path=ActualWidth}"&gt; &lt;Border Margin="10" DockPanel.Dock="Left" BorderBrush="White" BorderThickness="1" Height="48" Width="48" HorizontalAlignment="Center"&gt; &lt;Image Source="{Binding ThumbNail, IsAsync=True}" Height="48" Width="48" /&gt; &lt;/Border&gt; &lt;StackPanel Name="stkPanel" Margin="10" DockPanel.Dock="Right"&gt; &lt;TextBlock Text="{Binding UserName}" FontWeight="Bold" FontSize="18" /&gt; &lt;TextBlock Text="{Binding Text}" Margin="0,4,0,0" FontSize="14" Foreground="#c6de96" TextWrapping="WrapWithOverflow" /&gt; &lt;TextBlock Text="{Binding ApproximateTime}" FontSize="14" FontFamily="Georgia" FontStyle="Italic" Foreground="#BBB" /&gt; &lt;TextBlock Text="{Binding ScreenName}" Name="lblScreenName" FontSize="14" FontFamily="Georgia" FontStyle="Italic" Foreground="#BBB" Loaded="lblScreenName_Loaded" /&gt; &lt;/StackPanel&gt; &lt;/DockPanel&gt; &lt;/DataTemplate&gt; &lt;/ListBox.ItemTemplate&gt; &lt;/ListBox&gt; </code></pre> <p>My double click code:</p> <pre><code>private void lstTimeline_MouseDoubleClick(object sender, MouseButtonEventArgs e) { ListBoxItem lbi = (lstTimeline.SelectedItem as ListBoxItem); StackPanel item = lbi.FindName("stkPanel") as StackPanel; if (item != null) MessageBox.Show("StackPanel null"); TextBlock textBox = item.FindName("lblScreenName") as TextBlock; if (textBox != null) MessageBox.Show("TextBlock null"); MessageBox.Show(textBox.Text); } </code></pre> <p>But the <code>StackPanel</code> is null. How do find the right <code>TextBlock</code> in <code>SelectedItem</code>?</p> <p>Thanks for your help.</p>
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    1. COHow are you binding the ItemsSource of your ListBox? I don't see it being set in XAML. Are there actually items in your ListBox? If not then you will always get a null with the code you have
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