ViewEvent Class (System.Web.UI.Design)

A ViewEvent object is provided to the designer component by the design host, for example Visual Studio 2005, when raising an event caused by certain user actions on the design-time view of a control. The IControlDesignerView.ViewEvent event is handled by a ViewEventHandler delegate method, which takes a ViewEventArgs object as a parameter. The EventType property of the ViewEventArgs class is a ViewEvent object. The ViewEventHandler delegate method compares the EventType property to the static ViewEvent fields to determine which type of action raised the event. For example, an event is raised under the following circumstances:

• You click a region on the design surface.

• The designer draws a control on the design surface.

• You enter or exit template editing mode for a control.

The ControlDesigner class supplies a default delegate to handle the IControlDesignerView.ViewEvent event. Custom control designers override the OnClick, OnPaint, and OnTemplateModeChanged methods to process those events for the control on the design surface.

The designer host initializes a ViewEventArgs object for the type of action on the design surface, and then passes the object to the ViewEventHandler delegate. The EventType property of the ViewEventArgs object indicates which type of action:

• A Click event.

• A Paint event.

• A TemplateModeChanged event.

The EventArgs property supplies the event arguments that are specific to the type of action.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

.NET Framework

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