[sockets]sending string problem

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

Code:

---

            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

Code:

---

        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);
            }
        }

---

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?

Quote:

---

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.