The Ninth

Continue to study silverlight

Downloads with WebClient

public Page()
        {
            InitializeComponent();
            this.Loaded += new RoutedEventHandler(Page_Loaded);
        }

        void Page_Loaded(object sender, RoutedEventArgs e)
        {
            WebClient client = new WebClient();

            client.DownloadProgressChanged += new DownloadProgressChangedEventHandler(client_DownloadProgressChanged);
            client.OpenReadCompleted += new OpenReadCompletedEventHandler(client_OpenReadCompleted);

            // Uri need in ClientBin  This means we get file in web root folder
            client.OpenReadAsync(new Uri("..\\MT_B2_Anatomy.wmv", UriKind.Relative));
        }

        void client_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)
        {
            try
            {
                tbStatus.Text = string.Empty;
                myMedia.SetSource(e.Result);
                myMedia.Play();
            }
            catch (Exception exc)
            {
                tbStatus.Text = exc.Message;
            }
        }

        void client_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
        {
            tbStatus.Text = String.Format("Persentage is {0}%", e.ProgressPercentage);
        }

 

<Grid x:Name="LayoutRoot" Background="White" VerticalAlignment="Center">
        <MediaElement x:Name="myMedia" Margin="10" />
        <TextBlock x:Name="tbStatus" Text="Not set yet" HorizontalAlignment="Center" VerticalAlignment="Center"/>
    </Grid>

 

Uploads with WebClient

We need add a handler to test like this:

public void ProcessRequest(HttpContext context)
        {
            System.IO.StreamReader sr =
                new StreamReader(context.Request.InputStream);

            string requestData = sr.ReadToEnd(); // ADD BreakPoint to test, look the data

            context.Response.ContentType = "text/plain";
            context.Response.Write("Hello World");
        }

 

Upload String

private void btnUpload_Click(object sender, RoutedEventArgs e)
        {
            WebClient client = new WebClient();
            client.UploadProgressChanged += new UploadProgressChangedEventHandler(client_UploadProgressChanged);
            client.UploadStringCompleted += new UploadStringCompletedEventHandler(client_UploadStringCompleted);

            client.UploadStringAsync(new Uri("http://localhost:3615/Handler.ashx"), "POST", "Hello World");
        }

        void client_UploadStringCompleted(object sender, UploadStringCompletedEventArgs e)
        {
            tbStatus.Text = "Completed";
        }

        void client_UploadProgressChanged(object sender, UploadProgressChangedEventArgs e)
        {
            tbStatus.Text = String.Format("Persentage is {0}%", e.ProgressPercentage);
        }

Upload file content

private void btnUpload_Click(object sender, RoutedEventArgs e)
        {
            WebClient client = new WebClient();

            OpenFileDialog dialog = new OpenFileDialog();
            if (dialog.ShowDialog() == true)
            {
                client.OpenWriteCompleted += new OpenWriteCompletedEventHandler(client_OpenWriteCompleted);
                client.OpenWriteAsync(new Uri("http://localhost:3615/Handler.ashx", UriKind.Absolute), "POST",
                    dialog.File.OpenRead());
            }
        }

        void client_OpenWriteCompleted(object sender, OpenWriteCompletedEventArgs e)
        {
            Stream inputStream = e.UserState as Stream;
            Stream outputStream = e.Result;

            byte[] buffer = new byte[4096];
            int bufferRead = 0;

            while ((bufferRead = inputStream.Read(buffer, 0, buffer.Length)) > 0)
            {
                outputStream.Write(buffer, 0, bufferRead);
            }
            inputStream.Close();
            outputStream.Close();
        }