VirtualizingLayoutContext Class

Definition

Namespace:

Microsoft.UI.Xaml.Controls

Represents the base class for layout context types that support virtualization.

This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).

/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
/// [Windows.Foundation.Metadata.ContractVersion(Microsoft.UI.Xaml.XamlContract, 65536)]
class VirtualizingLayoutContext : LayoutContext

[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
[Windows.Foundation.Metadata.ContractVersion(typeof(Microsoft.UI.Xaml.XamlContract), 65536)]
public class VirtualizingLayoutContext : LayoutContext

Public Class VirtualizingLayoutContext
Inherits LayoutContext

Inheritance

DependencyObject

LayoutContext

VirtualizingLayoutContext

Attributes

MarshalingBehaviorAttribute ThreadingAttribute ContractVersionAttribute

Constructors

VirtualizingLayoutContext()

Initializes a new instance of the VirtualizingLayoutContext class. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).

Properties

ItemCount	Gets the number of items in the data. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
LayoutOrigin	Gets or sets the origin point for the estimated content size. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
LayoutOriginCore	Implements the behavior of LayoutOrigin in a derived or custom VirtualizingLayoutContext. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
LayoutState	Gets or sets an object that represents the state of a layout. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces). (Inherited from LayoutContext)
LayoutStateCore	Implements the behavior of LayoutState in a derived or custom LayoutContext. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces). (Inherited from LayoutContext)
RealizationRect	Gets an area that represents the viewport and buffer that the layout should fill with realized elements. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
RecommendedAnchorIndex	Gets the recommended index from which to start the generation and layout of elements. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
RecommendedAnchorIndexCore	Implements the behavior for getting the return value of RecommendedAnchorIndex in a derived or custom VirtualizingLayoutContext. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).

Methods

GetItemAt(Int32)	Retrieves the data item in the source found at the specified index. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
GetItemAtCore(Int32)	When implemented in a derived class, retrieves the data item in the source found at the specified index. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
GetOrCreateElementAt(Int32)	Retrieves a UIElement that represents the data item in the source found at the specified index. By default, if an element already exists, it is returned; otherwise, a new element is created. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
GetOrCreateElementAt(Int32, ElementRealizationOptions)	Retrieves a UIElement that represents the data item in the source found at the specified index using the specified options. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
GetOrCreateElementAtCore(Int32, ElementRealizationOptions)	When implemented in a derived class, retrieves a UIElement that represents the data item in the source found at the specified index using the specified options. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
ItemCountCore()	When implemented in a derived class, retrieves the number of items in the data. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
RealizationRectCore()	When implemented in a derived class, retrieves an area that represents the viewport and buffer that the layout should fill with realized elements. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
RecycleElement(UIElement)	Clears the specified UIElement and allows it to be either re-used or released. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).
RecycleElementCore(UIElement)	When implemented in a derived class, clears the specified UIElement and allows it to be either re-used or released. This documentation applies to WinUI 2 for UWP (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).