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Connect to multiple Tcp Servers

Posted on 2010-09-20
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Last Modified: 2012-06-27

Hello.

I want to connect to multiple TCP/IP servers at the same time.(Different IPs, same port)

When there is one server  my code is like:
TcpClient = new TcpClient()
client.GetStream().BeginRead(readBuffer, 0, 1024, newAsyncCallback(GetFromServer), null);

Now for multiple servers do i need to create  a TcpClient list ? Do i need to worry about thread safety ?

Frankly i could not decide how to design.
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Question by:parabellum
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kris_per earned 500 total points
ID: 33715483
To connect to multiple servers at the same time, you need to create multiple TcpClient instances in a thread.

Folllowing is a model using threads:
public class ServerIno
        {
            public string Address;

            // add any other server info here
        }

        [STAThread]
        static void Main()
        {
            List<ServerIno> listServerInfo = new List<ServerIno>();
            listServerInfo.Add(new ServerIno { Address = "10.10.10.10" });

            for(int s=0; s < listServerInfo.Count; s++)
            {
                Thread t = new Thread(DoWork);
                t.Start(listServerInfo[s]);
            }
        }

        public static void DoWork(object data)
        {
            ServerIno si = (ServerIno)data;

            int portNumber = 25; // use the correct port number here
            TcpClient client = new TcpClient(si.Address, portNumber);

            // use client object to send messages to server and get response from server here
        }

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Expert Comment

by:kris_per
ID: 33715518

Above sample doesn't need to do anything special for thread safety. But depending on further requirement (that will make threads to update a shared variable), then you need to consider thread-safetry issues.
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