Не оскудевает копилка примеров MSDN:
The following code example demonstrates setting an event handler for this event. (речь идёт о WebClient..::.DownloadProgressChanged)
| Код | // Sample call : DownLoadFileInBackground2 ("http://www.contoso.com/logs/January.txt");
public static void DownLoadFileInBackground2 (string address)
{
WebClient client = new WebClient ();
Uri uri = new Uri(address);
// Specify that the DownloadFileCallback method gets called
// when the download completes.
client.DownloadFileCompleted += new AsyncCompletedEventHandler (DownloadFileCallback2);
// Specify a progress notification handler.
client.DownloadProgressChanged += new DownloadProgressChangedEventHandler(DownloadProgressCallback);
client.DownloadFileAsync (uri, "serverdata.txt");
} |
The following code example shows an implementation of a handler for this event:
| Код | private static void UploadProgressCallback(object sender, UploadProgressChangedEventArgs e)
{
// Displays the operation identifier, and the transfer progress.
Console.WriteLine("{0} uploaded {1} of {2} bytes. {3} % complete...",
(string)e.UserState,
e.BytesSent,
e.TotalBytesToSend,
e.ProgressPercentage);
}
private static void DownloadProgressCallback(object sender, DownloadProgressChangedEventArgs e)
{
// Displays the operation identifier, and the transfer progress.
Console.WriteLine("{0} downloaded {1} of {2} bytes. {3} % complete...",
(string)e.UserState,
e.BytesReceived,
e.TotalBytesToReceive,
e.ProgressPercentage);
} |
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