Defines the attribute that indicates whether a control is treated as a visual or non-visual control during design time. This class cannot be inherited.
Assembly: System.Web (in System.Web.dll)
Thetype exposes the following members.
|Equals||Returns a value that indicates whether this instance is equal to a specified object. (Overrides Attribute.Equals(Object).)|
|GetHashCode||Returns the hash code for this instance. (Overrides Attribute.GetHashCode().)|
|GetType||Gets the Type of the current instance. (Inherited from Object.)|
|IsDefaultAttribute||Returns a value indicating whether the current instance is equivalent to a default instance of the class. (Overrides Attribute.IsDefaultAttribute().)|
|Match||When overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.)|
|ToString||Returns a string that represents the current object. (Inherited from Object.)|
|Default||Returns a instance that represents the application-defined default value of the attribute. This field is read-only.|
|NonVisual||Returns a instance that is applied to a Web control to be treated as a non-visual control during design time. This field is read-only.|
|Visual||Gets a instance that is applied to a Web control to be treated as a visual control during design time.|
|_Attribute.GetIDsOfNames||Maps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute.)|
|_Attribute.GetTypeInfo||Retrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute.)|
|_Attribute.GetTypeInfoCount||Retrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute.)|
|_Attribute.Invoke||Provides access to properties and methods exposed by an object. (Inherited from Attribute.)|
The attribute is applied to controls that are not rendered to the client, such as data source controls and the WebPartManager control. During design time, a page developer might decide to hide all non-visual controls. The designer would mark as invisible all of the controls with the attribute set to true.
The following code example demonstrates how you can apply the attribute to a class. In this example, the default attribute is applied to a data source control. This is equivalent to the NonVisual field.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.