WebClient.OnUploadStringCompleted(UploadStringCompletedEventArgs) 方法

定义

引发 UploadStringCompleted 事件。Raises the UploadStringCompleted event.

protected:
 virtual void OnUploadStringCompleted(System::Net::UploadStringCompletedEventArgs ^ e);
protected virtual void OnUploadStringCompleted (System.Net.UploadStringCompletedEventArgs e);
abstract member OnUploadStringCompleted : System.Net.UploadStringCompletedEventArgs -> unit
override this.OnUploadStringCompleted : System.Net.UploadStringCompletedEventArgs -> unit
Protected Overridable Sub OnUploadStringCompleted (e As UploadStringCompletedEventArgs)

参数

e
UploadStringCompletedEventArgs

包含事件数据的 UploadStringCompletedEventArgs 对象。An UploadStringCompletedEventArgs object containing event data.

示例

下面的代码示例演示了此方法的一个实现,该实现可由派生自的类进行自定义 WebClientThe following code example shows an implementation of this method that can be customized by a class derived from WebClient.

virtual void OnUploadStringCompleted( UploadStringCompletedEventArgs ^ e ) override
{
   // Here you can perform any custom actions before the event is raised
   // and event handlers are called...
   WebClient::OnUploadStringCompleted( e );

   // Here you can perform any post event actions...
}
protected override void OnUploadStringCompleted (UploadStringCompletedEventArgs e)
{
    // Here you can perform any custom actions before the event is raised
    // and event handlers are called...

    base.OnUploadStringCompleted (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,以便在事件发生时执行其他任务 UploadStringCompletedClasses that inherit from this class can override this method to perform additional tasks when the UploadStringCompleted event occurs.

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.

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

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

适用于