PictureBox.OnLoadProgressChanged(ProgressChangedEventArgs) 方法

定义

引发 LoadProgressChanged 事件。Raises the LoadProgressChanged event.

protected:
 virtual void OnLoadProgressChanged(System::ComponentModel::ProgressChangedEventArgs ^ e);
protected virtual void OnLoadProgressChanged (System.ComponentModel.ProgressChangedEventArgs e);
abstract member OnLoadProgressChanged : System.ComponentModel.ProgressChangedEventArgs -> unit
override this.OnLoadProgressChanged : System.ComponentModel.ProgressChangedEventArgs -> unit
Protected Overridable Sub OnLoadProgressChanged (e As ProgressChangedEventArgs)

参数

e
ProgressChangedEventArgs

包含事件数据的 ProgressChangedEventArgsA ProgressChangedEventArgs that contains the event data.

注解

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.

OnLoadProgressChanged 方法还允许派生类对事件进行处理而不必附加委托。The OnLoadProgressChanged 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.

继承者说明

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

适用于