Invalidate Method
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ControlDesigner.Invalidate Method

Invalidates the whole area of the control that is displayed on the design surface and signals the control designer to redraw the control.

Namespace:  System.Web.UI.Design
Assembly:  System.Design (in System.Design.dll)

public void Invalidate()

To enable the control designer to handle paint events, use the SetViewFlags method in the Initialize method.

The Invalidate method provides the design host with a way to instruct the control designer to redraw the control. Essentially, this is the same as calling UpdateDesignTimeHtml method, because it causes the whole control to be redrawn.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, 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.

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