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VirtualizingStackPanel.OnViewportOffsetChanged Method

Called when the offset of the viewport changes as a user scrolls through content.

Namespace:  System.Windows.Controls
Assembly:  PresentationFramework (in PresentationFramework.dll)

abstract OnViewportOffsetChanged : 
        oldViewportOffset:Vector * 
        newViewportOffset:Vector -> unit  
override OnViewportOffsetChanged : 
        oldViewportOffset:Vector * 
        newViewportOffset:Vector -> unit


Type: System.Windows.Vector

The old offset of the viewport.

Type: System.Windows.Vector

The new offset of the viewport

Use this method, in a derived class, to detect and respond to changes in the viewport location.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5 SP1, 3.0 SP2

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), 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.

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