WebClient.OnDownloadDataCompleted(DownloadDataCompletedEventArgs) Method
Definition
Important
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Raises the DownloadDataCompleted event.
protected:
virtual void OnDownloadDataCompleted(System::Net::DownloadDataCompletedEventArgs ^ e);protected virtual void OnDownloadDataCompleted (System.Net.DownloadDataCompletedEventArgs e);abstract member OnDownloadDataCompleted : System.Net.DownloadDataCompletedEventArgs -> unit
override this.OnDownloadDataCompleted : System.Net.DownloadDataCompletedEventArgs -> unitProtected Overridable Sub OnDownloadDataCompleted (e As DownloadDataCompletedEventArgs)Parameters
A DownloadDataCompletedEventArgs object that contains event data.
Examples
The following code example shows an implementation of this method that can be customized by a class derived from WebClient.
virtual void OnDownloadDataCompleted( DownloadDataCompletedEventArgs ^ e ) override
{
// Here you can perform any custom actions before the event is raised
// and event handlers are called...
WebClient::OnDownloadDataCompleted( e );
// Here you can perform any post event actions...
}
protected override void OnDownloadDataCompleted (DownloadDataCompletedEventArgs e)
{
// Here you can perform any custom actions before the event is raised
// and event handlers are called...
base.OnDownloadDataCompleted(e);
// Here you can perform any post event actions...
}
Remarks
Caution
WebRequest, HttpWebRequest, ServicePoint, and WebClient are obsolete, and you shouldn't use them for new development. Use HttpClient instead.
Classes that inherit from this class can override this method to perform additional tasks when the DownloadDataCompleted event occurs.
Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.
The OnDownloadDataCompleted method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.
Notes to Inheritors
When overriding OnDownloadDataCompleted(DownloadDataCompletedEventArgs) in a derived class, be sure to call the base class' OnDownloadDataCompleted(DownloadDataCompletedEventArgs) method so that registered delegates receive the event.
