WebClient.OnUploadValuesCompleted(UploadValuesCompletedEventArgs) 方法
定义
重要
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引发 UploadValuesCompleted 事件。
protected:
virtual void OnUploadValuesCompleted(System::Net::UploadValuesCompletedEventArgs ^ e);
protected virtual void OnUploadValuesCompleted (System.Net.UploadValuesCompletedEventArgs e);
abstract member OnUploadValuesCompleted : System.Net.UploadValuesCompletedEventArgs -> unit
override this.OnUploadValuesCompleted : System.Net.UploadValuesCompletedEventArgs -> unit
Protected Overridable Sub OnUploadValuesCompleted (e As UploadValuesCompletedEventArgs)
参数
包含事件数据的 UploadValuesCompletedEventArgs 对象。
示例
下面的代码示例演示此方法的实现,该方法可由派生自 WebClient的类进行自定义。
virtual void OnUploadValuesCompleted( UploadValuesCompletedEventArgs ^ e ) override
{
// Here you can perform any custom actions before the event is raised
// and event handlers are called...
WebClient::OnUploadValuesCompleted( e );
// Here you can perform any post event actions...
}
protected override void OnUploadValuesCompleted (UploadValuesCompletedEventArgs e)
{
// Here you can perform any custom actions before the event is raised
// and event handlers are called...
base.OnUploadValuesCompleted (e);
// Here you can perform any post event actions...
}
注解
从此类继承的类可以重写此方法,以在事件发生时 UploadValuesCompleted 执行其他任务。
引发事件时,将通过委托调用事件处理程序。 有关详细信息,请参阅 处理和引发事件。
OnUploadValuesCompleted 方法还允许派生类对事件进行处理而不必附加委托。 这是在派生类中处理事件的首选技术。
继承者说明
在派生类中重写 OnUploadValuesCompleted(UploadValuesCompletedEventArgs) 时,请务必调用基类的 OnUploadValuesCompleted(UploadValuesCompletedEventArgs) 方法,以便注册的委托接收 事件。
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