WebClient类

Video.wmv在ClientBin目录下：

void Page_Loaded(object sender, RoutedEventArgs e)
        {
            WebClient client = new WebClient();
            client.DownloadProgressChanged += new DownloadProgressChangedEventHandler(client_DownloadProgressChanged);
            client.OpenReadCompleted += new OpenReadCompletedEventHandler(client_OpenReadCompleted);
            client.OpenReadAsync(new Uri("Video.wmv", UriKind.Relative));
        }

        void client_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)
        {
            try
            {
                myMedia.SetSource(e.Result);
                myMedia.Play();
            }
            catch
            {
                myStatus.Text = "Terribly Error!";
            }

        }

        void client_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
        {
            myStatus.Text = string.Format("Progress of {0}%", e.ProgressPercentage);
            System.Threading.Thread.Sleep(100);
        }