VirtualizationMode Enumeration
[This documentation is for preview only, and is subject to change in later releases. Blank topics are included as placeholders.]
Specifies the method the VirtualizingStackPanel uses to manage virtualizing its child items.
Namespace: System.Windows.Controls
Assembly: PresentationFramework (in PresentationFramework.dll)
By default, a VirtualizingStackPanel creates an item container for each visible item and discards it when it is no longer needed (such as when the item is scrolled out of view). When an ItemsControl contains a many items, the process of creating and discarding item containers can negatively affect performance. When VirtualizationMode is set to Recycling, the VirtualizingStackPanel reuses item containers instead of creating a new one each time.
When VirtualizingStackPanel cannot recycle item containers, it uses the standard mode of virtualization, which is to create and discard item containers for each item. The following list describes cases when the VirtualizingStackPanel cannot recycle item containers:
The ItemsControl contains item containers of different types. For example, a Menu might have items that use both MenuItem and Separator objects as the item containers.
You explicitly create the item containers for the ItemsControl.
The following example creates a ListBox and sets the VirtualizationMode attached property to Recycling.
<StackPanel> <StackPanel.Resources> <src:LotsOfItems x:Key="data"/> </StackPanel.Resources> <ListBox Height="150" ItemsSource="{StaticResource data}" VirtualizingStackPanel.VirtualizationMode="Recycling" /> </StackPanel>
The following example shows the data used in the previous example.
Windows 8 Consumer Preview, Windows Server 8 Beta, Windows 7, Windows Server 2008 SP2, Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
