OnComponentChanging Method
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ITypeDescriptorContext.OnComponentChanging Method ()


Raises the ComponentChanging event.

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

bool OnComponentChanging()

Return Value

Type: System.Boolean

true if this object can be changed; otherwise, false.

Use the OnComponentChanging method to send notification that an instance of an object is about to be changed. This method also returns a value indicating whether this object can be changed. When false is returned, do not change the object.

Raising an event invokes the event handler through a delegate. For more information, see NIB: Raising an Event.

The OnComponentChanging method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.

Notes to Inheritors:

When overriding OnComponentChanging in a derived class, be sure to call the base class’s OnComponentChanging method so that registered delegates receive the event.

.NET Framework
Available since 1.1
Available since 2.0
Windows Phone Silverlight
Available since 7.0
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