ItemContainerGenerator Class

The ItemContainerGenerator class maintains associations between items controls and their item containers, such as ListBox and ListBoxItem. If a control has an associated ItemContainerGenerator, you will be able to retrieve it through a property on the control

You can use the ItemContainerGenerator to retrieve items based on their index or containers by specifying the data item. For example, if you have a data-bound TreeView, and you want to get a TreeViewItem based on its index, you can use the ContainerFromIndex method. If you want to retrieve the data item, use ItemFromContainer method.

The following example shows how to retrieve an ItemContainerGenerator for a TreeView object and use the ContainerFromIndex method.

Run this sample

public MainPage()
{
    InitializeComponent();
    string[] myItems = new string[]{"Item 1", "Item 2", "Item 3", "Item 4", "Item 5"};
    myTreeView.DataContext = myItems;
}
static int count = 1;
private void Button_Click(object sender, RoutedEventArgs e)
{
    TreeViewItem item = (TreeViewItem)myTreeView.ItemContainerGenerator.ContainerFromIndex(3);
    item.IsExpanded = true;
    if (count < 5)
    {
        item.Items.Add("Child " + count.ToString());
        count++;
    }
}

<StackPanel x:Name="LayoutRoot" Background="White">
    <sdk:TreeView x:Name="myTreeView" Width="200" ItemsSource="{Binding}" Margin="5"/>
    <Button Content="Add Child to Item 4" Width="150" Click="Button_Click"/>
</StackPanel>

Silverlight

Silverlight for Windows Phone

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Reference