Socket.Poll

Socket.Poll

• Priyananth

  :D thanks man!!! u pointed me in the right direction now its working :D
  
  mig16
  
  

• Der Sven

  Sorry for diverting your mind! but why dont you use NetworkStream Why do you want to do all work With Socket

  Try this:

  NetworkStream networkStream = new NetworkStream(clientSocket);

  Now do whatever you want to do with networkStream! Much Much Much easiear and simple to handle, detect disconnection, send and receive data.

  What do you say

  One other thing you better post this question in Networking and Communication Forum to get better answers to your problem.

  Best Regards,

  
  
  

• dhika

  According to the documentation, Socket.Poll (SelectMode.SelectRead) will return true if the connection has been closed, reset or terminated. It returns false when the client is connected, but there are no data to read. Sounds strange at first, but I guess this is made so that you are not kept waiting for a condition that will never be verified.

  Anyway, this can be used in the following way:

  bool isDisconnected = (socket.Poll (100, SelectMode.SelectRead) && (socket.Available == 0));

  HTH
  --mc

  
  

• jamba8

  thanks, i read that before posting, and didnt worked, i never receive 0, im using async recive and never get0 , any ideas guys
  
  mig16
  
  

• MSP.Saami

  a Similar question was answered here:

  http://forums.microsoft.com/MSDN/ShowPost.aspx PostID=761863&SiteID=1

  Best Regards,

  
  
  

• saiet

  rizwansharp can u explain me how i can detecte a disconnection with a networkstream
  
  thx
  
  mig16
  
  

• chaza

  thanks man, but i dont know why it dont works
  
  while (true)
  {
  if (!IsAlive())
  {
  if (ClientOffline != null)
  ClientOffline(this, new ConnectionEventArgs(this));
  break;
  }
  }
  
  public bool IsAlive()
  {
  return clientSocket.Poll(100,SelectMode.SelectRead) && (clientSocket.Available == 0);
  }
  
  i allready made sure that the while loop is running, and it allways reutrn true
  
  i open my server, and await connection , when connection is made, i close the client and the server never detect it, i use the debugger and i allways get true, meaning cliet still connected,
  
  this is very strange :(
  
  mig16
  
  

• Zulbaric

  Sorry, but the logic in the code you posted is reversed.

  As it stands, IsAlive will return true when the client disconnects. Try:

  public bool IsAlive()
  {
  return ! (clientSocket.Poll(100,SelectMode.SelectRead) && (clientSocket.Available == 0));
  }
  
  Keep in mind that you will not be able to detect if the client disconnects until you have emptied the receive buffer.

  This said, you may want to follow the advice of RizwanSharp and move your question to the Networking and Communication forum, as the thread is getting a little off-topic and you will get better assistance there.

  HTH
  --mc

  
  

• SanjaDj

  mig16 wrote:

  rizwansharp can u explain me how i can detecte a disconnection with a networkstream thx mig16

  Yes, Thats What I and Amit Paka Explained in the following post:

  http://forums.microsoft.com/MSDN/ShowPost.aspx PostID=761863&SiteID=1

  Cheers ;-)

  
  
  
• Socket.Poll