[sockets]sending string problem

[vivendi]

Hey, i have an Async nonblocking client/server application which should send strings to each other. Only the problem is that the string comes in in parts.
So i send the following string with the client to the server:

Hello

Then the server recieves it like this:
H
e
l
l
o


But it is important that i can send a complete strings to the server. Anyone any idea why this isn't happening now??


Client, send string button

            try
            {
                Object objData = "Hello";
                byte[] byData = System.Text.Encoding.ASCII.GetBytes(objData.ToString());
                m_socClient.Send(byData);
            }
            catch (SocketException se)
            {
                MessageBox.Show(se.Message);
            }

Server: Receive string and display in messagebox

        public void WaitForData(System.Net.Sockets.Socket soc)
        {
            try
            {
                if (pfnWorkerCallBack == null)
                {
                    pfnWorkerCallBack = new AsyncCallback(OnDataReceived);
                }
                CSocketPacket theSocPkt = new CSocketPacket();
                theSocPkt.thisSocket = soc;
                // now start to listen for any data...
                soc.BeginReceive(theSocPkt.dataBuffer, 0, theSocPkt.dataBuffer.Length, SocketFlags.None, pfnWorkerCallBack, theSocPkt);
            }
            catch (SocketException se)
            {
                MessageBox.Show(se.Message);
            }

        }

        public void OnDataReceived(IAsyncResult asyn)
        {
            try
            {
                CSocketPacket theSockId = (CSocketPacket)asyn.AsyncState;
                //end receive...
                int iRx = 0;
                iRx = theSockId.thisSocket.EndReceive(asyn);
                char[] chars = new char[iRx + 1];
                System.Text.Decoder d = System.Text.Encoding.UTF8.GetDecoder();
                int charLen = d.GetChars(theSockId.dataBuffer, 0, iRx, chars, 0);
                System.String szData = new System.String(chars);

                //Displays the string one letter at a time...
                MessageBox.Show(szData);
                WaitForData(m_socWorker);
            }
            catch (ObjectDisposedException)
            {
                System.Diagnostics.Debugger.Log(0, "1", "\nOnDataReceived: Socket has been closed\n");
            }
            catch (SocketException se)
            {
                MessageBox.Show(se.Message);
            }
        }

[RaleTheBlade]

How large is the byte buffer that your placing the received string into? If its only one byte, you will receive only one byte off of the internal buffer at a time.

EDIT:

Also, I cant help but notice your sending ASCII bytes, but receiving and decoding them into UTF-8. It should work regardless but just for consistency sake have you thought about receiving them and decoding them as ASCII?

[Mutant_Fruit]

But it is important that i can send a complete strings to the server. Anyone any idea why this isn't happening now??

Generally, this is impossible due to how TCP operates. If you send 100 bytes, they can arrive in a single 100 byte chunk or one hundred 1 byte chunks. Your application has to cope with that.