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PONetwork stream stuck on stream.Read(byte[] byte, int offset, int size)
 

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  1. PONetwork stream stuck on stream.Read(byte[] byte, int offset, int size)
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    <p>What I'm trying to do is to received a large number of bytes (about 5MB data) sent from the client side</p> <p>Below is the code where data(byte[]) is received</p> <pre><code> byte[] receivedBytesRaw = new byte[4000]; //first, initialize network stream NetworkStream stream = client.GetStream(); //The bytesNeeded is the size of bytes which is a protocol sent by the client side indicating the size of byte which will be sent int bytesNeeded = 4000; int bytesReceived = 0; do { int bytesRead = stream.Read(receivedBytesRaw, bytesReceived, bytesNeeded - bytesReceived); networkValidation.addBytesToList(receivedBytesRaw, ref receivedBytes); bytesReceived += bytesRead; } while (bytesReceived &lt; bytesNeeded); </code></pre> <p>But now I'm stuck on a problem:</p> <p>Everytime when data arrives, the do while loop loops for the first time, and the return value (i) is 26, then it loops again, this time, when it goes to <code>" i = stream.Read(receivedBytesRaw, 0, receivedBytesRaw.Length);"</code>, the program seems waiting for the client side to send data and have no response, also, when I check "receivedBytesRaw", the data was incomplete, only the first 13 bytes was received, the remaining space in the byte array remains null, and the stream.DataAvailable is false</p> <p>Why the server side received incomplete data? Note: when I try to send small data (a string), it's ok</p> <p>=====================================================================</p> <p>Edited</p> <p>Below is the client side code which sends data:</p> <pre><code> private int sendData(byte[] dataSend, string IP, int portNumber) { TcpClient clientSide = new TcpClient(); int result = -1; try { clientSide.Connect(IP, portNumber); } catch (Exception ex) { return 2; } NetworkStream netStream = clientSide.GetStream(); if (netStream.CanWrite) { byte[] replyMsg = new byte[1024]; netStream.Write(dataSend, 0, dataSend.Length); netStream.Flush(); result = 0; } else { result = 1; } return result; } </code></pre>
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    1. USUser2012384
    1. USUser2012384
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    1. COcand you post the code of the client side ? they need to be in sync about the amount of data that is being sent
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      1. PONetwork stream stuck on stream.Read(byte[] byte, int offset, int size)
      1. USMauricio Gracia Gutierrez
    2. COPlease see my edited code, I've tested the Client side and the data(byte array) being sent is correct
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      1. USUser2012384
    3. COYou simply don't know when to stop reading. TCP is a stream, not a packet format. The sender doesn't indicate how many bytes it is going to send and doesn't close the socket. So the receiver will inevitably get stuck in the loop. Fix this by first writing dataSend.Length. The receiver can now read that first and count off the bytes.
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      1. PONetwork stream stuck on stream.Read(byte[] byte, int offset, int size)
      1. USHans Passant
 

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