Question

I have a listbox with a bunch of contols in each list item.

<ListBox x:Name='projectList' IsSynchronizedWithCurrentItem='True'>     <ListBox.ItemTemplate>         <DataTemplate>             <StackPanel>                 <TextBlock Text='{Binding Name}' />                 <ListBox x:Name='taskList' ItemsSource='{Binding Tasks}'>                     <ListBox.ItemTemplate>                         <DataTemplate>                             <StackPanel>                                 <TextBlock Text='{Binding Name}' />                             </StackPanel>                         </DataTemplate>                     </ListBox.ItemTemplate>                 </ListBox>                 <TextBox x:Name='textBoxTask' />                 <Button                     x:Name='ButtonAddNewTask'                     Content='Test'                     CommandParameter='{Binding RelativeSource={RelativeSource TemplatedParent}, Path=DataContext}'                     Click='ButtonAddNewTask_Click'                     />             </StackPanel>         </DataTemplate>     </ListBox.ItemTemplate> </ListBox> 

When I click on the button in the listbox i want to add a new item to the listbox within the listbox. I’ve come this far. So my question is how do I get hold of the textbox and how do I update the listbox?

Here is my click event

private void ButtonAddNewTask_Click(object sender, RoutedEventArgs e) {     Button button = (Button)sender;     Project proj = button.DataContext as Project;     if(proj.Tasks == null)         proj.Tasks = new List<Task>();      proj.Tasks.Add(new Task('Added Task')); } 

Thanx

Answer 1

This solution worked for the task at hand so to speak.

    private void ButtonAddNewTask_Click(object sender, RoutedEventArgs e)     {         Button button = (Button)sender;         DependencyObject obj = LogicalTreeHelper.GetParent(button);         StackPanel item = obj as StackPanel;         TextBox textBox = item.FindName('textBoxTask') as TextBox;         ListBox listBox = item.FindName('taskList') as ListBox;          Project proj = button.DataContext as Project;         if(proj.Tasks == null)             proj.Tasks = new List<Task>();          listBox.ItemsSource = proj.Tasks;         listBox.Items.Refresh();     }