How do I access the AccordionItems of an Accordion programatically?

How do I access the AccordionItems of an Accordion programatically?

I am using an accordion in my silverlight app. In the accordionItem I am having a listbox and I need to access the expanded accordion item and this listbox of the accordion.

I am having hard time finding accessing the accordionitem and the listbox it is holding. How do I do this?

What I tried to solve it is to use the following extension class:

public static IEnumerable<DependencyObject> GetVisuals(this DependencyObject root) {   int count = VisualTreeHelper.GetChildrenCount(root);   for (int i = 0; i < count; i++)   {     var child = VisualTreeHelper.GetChild(root, i);     yield return child;     foreach (var descendants in child.GetVisuals())     {       yield return descendants;     }   } } 

and then call it for my accordion:

    foreach (var control in MyAccordion.GetVisuals().OfType<ListBox>())     {       // Do something with the listbox      } 

Unfortunately, even without the OfType extension method the Accordion reports to have 0 when GetChildrenCount is called inside the extension method.

UPDATE:

I found a way to access the AccordionItem using the following code

    int selectedIndex = OrganiChartAccordion.SelectedIndex;     AccordionItem accordionItem = OrganiChartAccordion.ItemContainerGenerator.ContainerFromIndex(selectedIndex) as AccordionItem; 

In the AccordionItem I am using a DataTemplate to render the data. In the DataTemplate I have two listboxes. I need to access the data template in the accordionitem that is selected and inside the datatemplate the two listbox.

Answers & Comments...

Answer: 1

Try this:

<UserControl x:Class="SilverlightApplication10.MainPage"              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"              xmlns:layout="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Layout.Toolkit"              mc:Ignorable="d"              d:DesignHeight="300"              d:DesignWidth="400">      <Grid x:Name="LayoutRoot"           Background="White">         <layout:Accordion x:Name="Accordion1">             <layout:Accordion.Items>                 <layout:AccordionItem Header="Header 1">                     <ListBox>                         <ListBox.Items>                             <ListBoxItem Content="Item 1"></ListBoxItem>                             <ListBoxItem Content="Item 2"></ListBoxItem>                             <ListBoxItem Content="Item 3"></ListBoxItem>                         </ListBox.Items>                     </ListBox>                 </layout:AccordionItem>                 <layout:AccordionItem Header="Header 2">                     <ListBox>                         <ListBox.Items>                             <ListBoxItem Content="Item 1"></ListBoxItem>                             <ListBoxItem Content="Item 2"></ListBoxItem>                             <ListBoxItem Content="Item 3"></ListBoxItem>                         </ListBox.Items>                     </ListBox>                 </layout:AccordionItem>             </layout:Accordion.Items>         </layout:Accordion>     </Grid> </UserControl> 

And the code-behind:

using System; using System.Diagnostics; using System.Linq; using System.Windows; using System.Windows.Controls;  namespace SilverlightApplication10 {     public partial class MainPage : UserControl     {         public MainPage()         {             InitializeComponent();              this.Loaded += MainPage_Loaded;         }          void MainPage_Loaded(object sender, RoutedEventArgs e)         {             Accordion1.Items.ToList().ForEach(item =>                 {                     ((item as AccordionItem).Content as ListBox).Items.ToList().ForEach(listBoxItem =>                         {                             var content = ((ListBoxItem)listBoxItem).Content;                              Debug.WriteLine(content);                         });                 });         }     } } 

by : Henrik Söderlundhttp://stackoverflow.com/users/250605

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