Export (0) Print
Expand All
This topic has not yet been rated - Rate this topic

ItemContainerGenerator.ContainerFromIndex Method

Returns the container for the item at the specified index within the ItemCollection.

Namespace:  System.Windows.Controls
Assembly:  System.Windows (in System.Windows.dll)
public DependencyObject ContainerFromIndex(
	int index


Type: System.Int32
The index of the item to retrieve.

Return Value

Type: System.Windows.DependencyObject
The container for the item at the specified index within the item collection, if the item has a container; otherwise, null.

If there is no item at the specified index or the item has no container, the ContainerFromIndex method returns null.

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

Run this sample

public MainPage()
    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());

<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"/>


Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

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

Did you find this helpful?
(1500 characters remaining)
Thank you for your feedback

Community Additions

© 2014 Microsoft. All rights reserved.