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DesignerRegion Class

Note: This class is new in the .NET Framework version 2.0.

Defines a region of content within the design-time markup for the associated control.

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

public class DesignerRegion : DesignerObject
public class DesignerRegion extends DesignerObject
public class DesignerRegion extends DesignerObject

The DesignerRegion object represents a region of content within the design-time markup that is generated by a ControlDesigner implementation. A control developer uses designer regions in a custom ControlDesigner implementation to define separate areas within the design-time markup for the associated control and to provide editing and event handling for the area. A visual designer, such as Visual Studio 2005, can use designer regions to display the separate areas of a control on the design surface and to raise user events for the region to the control designer. Designer regions can simplify a control designer implementation because many region-based features are provided by the base designer classes and the visual designer.

The DesignerRegion class provides the base functionality for designer regions, such as the ability to click, select, and highlight a region in the design surface. Use a DesignerRegion object in a control designer implementation to define a region that does not require editing. Use the derived EditableDesignerRegion class in a control designer implementation to define a region with editable content at design time. Use the derived TemplatedEditableDesignerRegion class in a control designer implementation to define an editable region that represents a template in a control.

To support regions within a class that is derived from the ControlDesigner, override the GetDesignTimeHtml method and add one or more initialized DesignerRegion objects to the DesignerRegionCollection collection. Optionally, you can handle mouse clicks in the regions on the design surface by overriding the OnClick method.

Use the properties of a DesignerRegion object to determine how the region is displayed by the visual designer. Override the Selectable property to indicate that the region can be selected by the user on the design surface. Use the Highlight property to highlight the designer region in the visual designer; for example, you can highlight a region after a user has clicked to select it. Use the DisplayName and Description properties to store or retrieve additional details about the region. In particular, the Description property is used by the visual designer to display ToolTip information when the user moves the mouse pointer over the designer region. Use the Designer property to access the methods and properties of the control designer object that contains the designer region.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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

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

.NET Framework

Supported in: 2.0