NetworkStream.Length Property

NetworkStream.Length Property

• Kamii47

  Ivaylo.Bratoev wrote:

  Try out this article: http://www.yoda.arachsys.com/csharp/readbinary.html

  
  
  Thank your for link, it gave me some idea...
  
  
  

• Recep TARAKÇIOĞLU

  Try out this article:

  http://www.yoda.arachsys.com/csharp/readbinary.html

  
  

• mmmmBeeeer

  Hi Rizwan,
  
  private void Receive(object sender, DoWorkEventArgs e)
  {
  while (true)
  {
  dataTransfer.Reset();
  clientStream.BeginRead(ReceiveBuffer, 0, (int)clientStream.Length,
  new AsyncCallback(AsyncReceiveDataCallback), clientStream);
  dataTransfer.WaitOne();
  }
  }
  
  I want to read all bytes that have came on the first time, the incoming mesagge length is not fixed but it has a maximum value such as 1024 byte. I want to take all the message when it comes, otherwise I have to find message header and then find the length, but if I know the amount of data in the stream buffer, I can assume that it is a message.
  
  

• technoTABLET

  A Better way to know whats coming and how much Read to make sure message is completely received and do not receive contents of next message, you should send length of each message preceeding each message here is send example:

  string message = "this is a message";

  byte[] bytes = Encoding.Ascii.GetBytes(message);

  byte[] length = BitConvertor.GetBytes(bytes.Length); // Convert message bytes' length to bytes (Will always return 4 bytes "Size of int")

  clientStream.Write(length, 0, length.Length); // Send Length

  clientStream.Write(bytes , 0, bytes.Length); // Send the actual message

  On Receiving side you can use mixture of Asyncrhonous and Synchnronous Read methods to get work done efficiently without blocking.

  I writie the steps here, if you face any problem you can contact again.

  1) Read only 4 bytes asynchronously

  2) convert those 4 bytes in to int using BitConvert.ToInt32();

  3) Create a Memory stream to read all the bytes fron NetworkStream into NetworkStream here is snippet

  int messageSize = BitConverter.ToInt32(messageDataLengthBuffer, 0); // it was read from Asynch Read ano now we are converting it back to int
  

  MemoryStream memstrm = new MemoryStream();
  
  readByteCount = 0;
  while (messageSize > 0)
  {
  if (messageSize > messageDataBuffer.Length)
  readByteCount = dataStream.Read(messageDataBuffer, 0, messageDataBuffer.Length);
  else
  readByteCount = dataStream.Read(messageDataBuffer, 0, messageSize);

  
  memstrm.Write(this.messageDataBuffer, 0, readByteCount);
  messageSize -= readByteCount;
  }
  

  It'll exactly read the length of the message (Complete) not 1 bytes less or more.

  I hope this will help.

  Best Regards,

  Rizwan

  
  
  

• lou_1

  Its means that Property exists but there is not any implementation in it and when you call it it raises NotSuported exception because its somehting like:

  public long Length

  {

  get {

  throw new NotSupportedException();

  }

  }

  Tell me what your scenerio and why do you need to get length of the stream, there may be many alternates to get your work done without this property.

  Best Regards,

  Rizwan

  
  
  

• Prashweenet

  Hi Rizwan,
  
  Your suggestion is the procedure that I want to implement but we use DNP protocol and sending the length byte is uncompatible with DNP. I guess, I have to decompose DNP Application header then find the length of the message. This is the most reliable way. Thank you for your suggestions Rizwan...
  
  
  
• NetworkStream.Length Property