VirtualizingStackPanel.OnCleanUpVirtualizedItem(CleanUpVirtualizedItemEventArgs) VirtualizingStackPanel.OnCleanUpVirtualizedItem(CleanUpVirtualizedItemEventArgs) VirtualizingStackPanel.OnCleanUpVirtualizedItem(CleanUpVirtualizedItemEventArgs) VirtualizingStackPanel.OnCleanUpVirtualizedItem(CleanUpVirtualizedItemEventArgs) Method

Definition

Called when an item that is hosted by the VirtualizingStackPanel is re-virtualized.

protected:
 virtual void OnCleanUpVirtualizedItem(System::Windows::Controls::CleanUpVirtualizedItemEventArgs ^ e);
protected virtual void OnCleanUpVirtualizedItem (System.Windows.Controls.CleanUpVirtualizedItemEventArgs e);
abstract member OnCleanUpVirtualizedItem : System.Windows.Controls.CleanUpVirtualizedItemEventArgs -> unit
override this.OnCleanUpVirtualizedItem : System.Windows.Controls.CleanUpVirtualizedItemEventArgs -> unit
Protected Overridable Sub OnCleanUpVirtualizedItem (e As CleanUpVirtualizedItemEventArgs)

Parameters

Remarks

The standard layout system creates item containers and computes layout for each item associated with a list control. The word "virtualize" refers to a technique by which a subset of UI elements are generated from a larger number of data items based on which items are visible on-screen. Generating many UI elements when only a few elements might be on the screen can adversely affect the performance of your application. The VirtualizingStackPanel calculates the number of visible items and works with the ItemContainerGenerator from an ItemsControl (such as ListBox or ListView) to create UI elements only for visible items.

Applies to