StreamSocket, DataWriter.StoreAsync(), DataReader.LoadAsync() -- Asynchronous problems

Question

I'm creating a Win 8 store app in which I connect to a server, written in Java, using StreamSocket. When I run the app in debug, with breakpoints on StreamSocket.ConnectAsync(...), DataWriter.StoreAsync(), and DataReader.LoadAsync(...), it connects, sends the message, and receives a message back. However, once I remove any one of my breakpoints, that method doesn't do it's job. How can I can fix this issue? Here is my code:

	public async void Connect()
        {
            try
            {
                await socket.ConnectAsync(new Windows.Networking.HostName(ip),
                    "50000", SocketProtectionLevel.PlainSocket);
                Connected = true;
            }
            catch (Exception e)
            {
                if (SocketError.GetStatus(e.HResult) == SocketErrorStatus.Unknown)
                {
                    throw;
                }

                Windows.UI.Popups.MessageDialog md =
                    new Windows.UI.Popups.MessageDialog("Error: " + e.Message);
                return;
            }
            return;

        }
	public async void HandShake()
        {
            try
            {

                //output
                writer = new DataWriter(socket.OutputStream);
                writer.UnicodeEncoding = Windows.Storage.Streams.UnicodeEncoding.Utf8;

                byte[] nameBytes = Encoding.UTF8.GetBytes(Name.ToCharArray());
                writer.WriteBytes(nameBytes);
                await writer.StoreAsync();

                await writer.FlushAsync();
                writer.DetachStream();
                writer.Dispose();


                //input
                reader = new DataReader(socket.InputStream);
                reader.InputStreamOptions = InputStreamOptions.Partial;
                reader.UnicodeEncoding = Windows.Storage.Streams.UnicodeEncoding.Utf8;

                uint bytesAvailable = await reader.LoadAsync(4096);
                byte[] byArray = new byte[bytesAvailable];
                reader.ReadBytes(byArray);
                string temp = Encoding.UTF8.GetString(byArray, 0,
                    Convert.ToInt32(bytesAvailable));

                temp = temp.Substring(0, temp.Length - 1);

                if (temp == "NAME OK")
                {
                    GoodName = true;
                }

                reader.DetachStream();
                reader.Dispose();
            }
            catch (Exception e)
            {
                //await Task.WhenAll(tasks.ToArray());
                if (SocketError.GetStatus(e.HResult) == SocketErrorStatus.Unknown)
                {
                    throw;
                }

                Windows.UI.Popups.MessageDialog md =
                    new Windows.UI.Popups.MessageDialog("Error: " + e.Message);
                md.ShowAsync();
            }
        }

Thanks in advance!

Answer 1

Most likely you call this methods one after another, and because they are both defined as async void, they do not cooperate with each other. You need:

1) Define both methods as async Task, e.g. public async Task Connect() {...}

2) Always call them using await, e.g.await Connect();

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Blog: http://lunarfrog.com/blog

Answer 2

That did it. That fixed my issues. Thank you!