ITypeDescriptorContext.OnComponentChanged Method

Definition

引发 ComponentChanged 事件。Raises the ComponentChanged event.

public:
 void OnComponentChanged();
public void OnComponentChanged ();
abstract member OnComponentChanged : unit -> unit
Public Sub OnComponentChanged ()

Remarks

使用 OnComponentChanged 方法发送有关对象实例已更改的通知。Use the OnComponentChanged method to send notification that an instance of an object has changed.

引发事件时,将通过委托调用事件处理程序。Raising an event invokes the event handler through a delegate. 有关详细信息,请参阅处理和引发事件For more information, see Handling and Raising Events.

OnComponentChanged 方法还允许派生类对事件进行处理而不必附加委托。The OnComponentChanged method also allows derived classes to handle the event without attaching a delegate. 这是在派生类中处理事件的首选技术。This is the preferred technique for handling the event in a derived class.

Notes to Implementers

当在派生类中重写 OnComponentChanged() 时,请确保调用基类的 "OnComponentChanged() 方法,以便注册的委托接收事件。When overriding OnComponentChanged() in a derived class, be sure to call the base class' OnComponentChanged() method so that registered delegates receive the event.

Applies to

See also