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WebClient.OnDownloadDataCompleted Method

Raises the DownloadDataCompleted event.

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

protected virtual void OnDownloadDataCompleted(
	DownloadDataCompletedEventArgs e
)

Parameters

e
Type: System.Net.DownloadDataCompletedEventArgs
A DownloadDataCompletedEventArgs object that contains event data.

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 Raising an Event

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 in a derived class, be sure to call the base class’s OnDownloadDataCompleted 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 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...
}


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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