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VirtualizingStackPanel.AddCleanUpVirtualizedItemHandler Method

Definition

Adds an event handler for the CleanUpVirtualizedItem attached event.

public:
 static void AddCleanUpVirtualizedItemHandler(System::Windows::DependencyObject ^ element, System::Windows::Controls::CleanUpVirtualizedItemEventHandler ^ handler);
public static void AddCleanUpVirtualizedItemHandler (System.Windows.DependencyObject element, System.Windows.Controls.CleanUpVirtualizedItemEventHandler handler);
static member AddCleanUpVirtualizedItemHandler : System.Windows.DependencyObject * System.Windows.Controls.CleanUpVirtualizedItemEventHandler -> unit
Public Shared Sub AddCleanUpVirtualizedItemHandler (element As DependencyObject, handler As CleanUpVirtualizedItemEventHandler)

Parameters

element
DependencyObject

The DependencyObject that is listening for this event.

handler
CleanUpVirtualizedItemEventHandler

The event handler that is to be added.

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