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DownloadDataCompletedEventArgs Class
.NET Framework 3.0
Provides data for the DownloadDataCompleted event.
Namespace: System.Net
Assembly: System (in system.dll)
Assembly: System (in system.dll)
Instances of this class are passed to the DownloadDataCompletedEventHandler.
The following code example demonstrates downloading a user-specified resource.
// 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 (); }
The following method is called when the download completes.
private static void DownloadDataCallback (Object sender, DownloadDataCompletedEventArgs e) { System.Threading.AutoResetEvent waiter = (System.Threading.AutoResetEvent)e.UserState; try { // If the request was not canceled and did not throw // an exception, display the resource. if (!e.Cancelled && e.Error == null) { byte[] data = (byte[])e.Result; string textData = System.Text.Encoding.UTF8.GetString (data); Console.WriteLine (textData); } } finally { // Let the main application thread resume. waiter.Set (); } }
System.Object
System.EventArgs
System.ComponentModel.AsyncCompletedEventArgs
System.Net.DownloadDataCompletedEventArgs
System.EventArgs
System.ComponentModel.AsyncCompletedEventArgs
System.Net.DownloadDataCompletedEventArgs
Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.Community Additions
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