WebClient.OnOpenWriteCompleted(OpenWriteCompletedEventArgs) 方法

  • 参考

定义

命名空间:
System.Net
程序集:
System.Net.WebClient.dll
程序集:
System.dll
程序集:
netstandard.dll
Source:
WebClient.cs
Source:
WebClient.cs
Source:
WebClient.cs

引发 OpenWriteCompleted 事件。

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

参数

e
OpenWriteCompletedEventArgs

包含事件数据的 OpenWriteCompletedEventArgs 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 OnOpenWriteCompleted( OpenWriteCompletedEventArgs ^ e ) override
{
   // Here you can perform any custom actions before the event is raised
   // and event handlers are called...
   WebClient::OnOpenWriteCompleted( e );

   // Here you can perform any post event actions...
}

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

    base.OnOpenWriteCompleted (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 OpenWriteCompleted 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。

OnOpenWriteCompleted 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 OnOpenWriteCompleted(OpenWriteCompletedEventArgs) 时，请务必调用基类的 OnOpenWriteCompleted(OpenWriteCompletedEventArgs) 方法，以便注册的委托接收事件。

适用于