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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)

protected virtual void OnViewportOffsetChanged(
	Vector oldViewportOffset,
	Vector newViewportOffset


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, 3.5 SP1, 3.0 SP2

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.