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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 ()
public void Invalidate ()
public function Invalidate ()
Not applicable.

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.

Windows 98, Windows Server 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0
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