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WebClient.DownloadDataCompleted Event

Occurs when an asynchronous data download operation completes.

Namespace:  System.Net
Assembly:  System (in System.dll)
public event DownloadDataCompletedEventHandler DownloadDataCompleted

This event is raised each time an asynchronous data download operation completes. Asynchronous data downloads are started by calling the DownloadDataAsync methods.

The DownloadDataCompletedEventHandler is the delegate for this event. The DownloadDataCompletedEventArgs class provides the event handler with event data.

For more information about handling events, see Consuming Events.

The following code example demonstrates setting an event handler for this event.

// Sample call : DownLoadDataInBackground ("http://www.contoso.com/GameScores.html");
public static void DownloadDataInBackground (string address)
{
    System.Threading.AutoResetEvent waiter = new System.Threading.AutoResetEvent (false);
    WebClient client = new WebClient ();
    Uri uri = new Uri(address);

    // Specify that the DownloadDataCallback method gets called 
    // when the download completes.
    client.DownloadDataCompleted += new DownloadDataCompletedEventHandler (DownloadDataCallback);
    client.DownloadDataAsync (uri, waiter);

    // Block the main application thread. Real applications 
    // can perform other tasks while waiting for the download to complete.
    waiter.WaitOne ();
}
// Sample call : DownLoadDataInBackground ("http://www.contoso.com/GameScores.html");
void DownloadDataInBackground (String* address)
{
    System::Threading::AutoResetEvent* waiter = new System::Threading::AutoResetEvent (false);
    WebClient* client = new WebClient ();

    // Specify that the DownloadDataCallback method gets called
    // when the download completes.
    client->DownloadDataCompleted += new DownloadDataCompletedEventHandler (DownloadDataCallback);
    client->DownloadDataAsync (address, waiter);

    // Block the main application thread. Real applications
    // can perform other tasks while waiting for the download to complete.
    waiter->WaitOne ();
}

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

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

.NET Framework

Supported in: 3.5, 3.0, 2.0

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