OnDownloadProgressChanged Method

WebClient.OnDownloadProgressChanged Method (DownloadProgressChangedEventArgs)


Raises the DownloadProgressChanged event.

Namespace:   System.Net
Assembly:  System (in System.dll)

protected virtual void OnDownloadProgressChanged(
	DownloadProgressChangedEventArgs e


Type: System.Net.DownloadProgressChangedEventArgs

A DownloadProgressChangedEventArgs object containing event data.

Classes that inherit from this class can override this method to perform additional tasks when the DownloadProgressChanged event occurs.

Raising an event invokes the event handler through a delegate. For more information, see NIB: Raising an Event.

The OnDownloadProgressChanged 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 OnDownloadProgressChanged in a derived class, be sure to call the base class’s OnDownloadProgressChanged method so that registered delegates receive the event.

The following code example shows an implementation of this method that can be customized by a class derived from WebClient.

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

    base.OnDownloadProgressChanged (e);

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

.NET Framework
Available since 2.0
Available since 2.0
Windows Phone Silverlight
Available since 7.0
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