在UWP中将数据从服务器发送到客户端

Question

I am trying to create an UWP client and Server application. Both client and server are hosted on Different machines.

Network connection with UWP Apps

Using this link i was able to connect to the server and can send string from client to server. This piece is absolutely fine.

But now question is how to send the data from server to client. I could not find any proper sample . Can some one throw a light on sending data from server to the client.

Any piece of code or link is Much appreciated.

Answer 1

From the code you have mentioned, Modify ConnectSocket() method to read response from server.

I have not run the code. modifications may be required

private async Task ConnectSocket()
    {
        StreamSocket socket = new StreamSocket();

        socket.Control.KeepAlive = false;

        HostName host = new HostName("localhost");

        try
        {
            await socket.ConnectAsync(host, "5463");

            Stream streamOut = socket.OutputStream.AsStreamForWrite();
            StreamWriter writer = new StreamWriter(streamOut);
            string request = "Test Self App \n";
            await writer.WriteLineAsync(request);
            await writer.FlushAsync();
            // Code for reading
            Stream streamIn = socket.OutputStream.AsStreamForRead();
            StreamReader reader = new StreamReader(streamIn);
            char[] result = new char[reader.BaseStream.Length];
            await reader.ReadAsync(result, 0, (int)reader.BaseStream.Length);
            // Your data will be in results
            socket.Dispose();
        }
        catch (Exception ex)
        {
            txb_Events.Text += ex.Message;
            //Logs.Add(ex.Message)
        }


    }

Answer 2

But now question is how to send the data from server to client.

Since you are using StreamSocket to establish the connection between server and client, there is a official Socket activity trigger stream socket sample which include both client app and server app and perfectly shows how to use the Socket Activity Stream Socket API to keep a socket connection alive beyond the lifetime of the application.

For sending data from server to client part, in the StreamSocketListenerServer (server) project:

private async void SendButton_Click(object sender, RoutedEventArgs e)
{
    try
    {
        DataWriter writer = new DataWriter(connectedSocket.OutputStream);
        writer.WriteBytes(Encoding.UTF8.GetBytes(SendMessageTextBox.Text));
        SendMessageTextBox.Text = "";
        await writer.StoreAsync();
        writer.DetachStream();
        writer.Dispose();
    }
    catch(Exception exception)
    {
        rootPage.NotifyUser(exception.Message, NotifyType.ErrorMessage);
    }
}