Component.CanRaiseEvents Property

Gets a value indicating whether the component can raise an event.

Namespace:  System.ComponentModel
Assembly:  System (in System.dll)

'Declaration
Protected Overridable ReadOnly Property CanRaiseEvents As Boolean

Property Value

Type: System.Boolean
true if the component can raise events; otherwise, false. The default is true.

The default implementation of this property always returns true. Classes that inherit from the Component class should override this property to provide the ability to disable the raising of events. For example, in the Control class, if the control is being hosted as an ActiveX control, the CanRaiseEvents property returns false if the ActiveX control has its events frozen.

Notes to Inheritors

If you override this method in a deriving class and change it to return false, the EventHandlerList collection returned by the Events property returns Nothing for an event. Events can still be added and removed from the collection, but the collection's Item property will always return Nothing.

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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.

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