ITypeDescriptorContext.OnComponentChanging Method
Definition
Important
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Raises the ComponentChanging event.
public:
bool OnComponentChanging();public bool OnComponentChanging ();abstract member OnComponentChanging : unit -> boolPublic Function OnComponentChanging () As BooleanReturns
true if this object can be changed; otherwise, false.
Remarks
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 Handling and Raising Events.
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 Implementers
When overriding OnComponentChanging() in a derived class, be sure to call the base class' OnComponentChanging() method so that registered delegates receive the event.
