学步园

真希望有时间能静下心来写几篇c#、java和c++ socket相互通信的帖子。写写它们的异同点，总结一下。

下面是msdn上的一个例子，

使用TCPClient来处理连接与收发，特别简单。

static void Connect(String server, String message)<br /> {<br /> try<br /> {<br /> // Create a TcpClient.<br /> // Note, for this client to work you need to have a TcpServer<br /> // connected to the same address as specified by the server, port<br /> // combination.<br /> Int32 port = 13000;<br /> TcpClient client = new TcpClient(server, port);<br /> // Translate the passed message into ASCII and store it as a Byte array.<br /> Byte[] data = System.Text.Encoding.ASCII.GetBytes(message);<br /> // Get a client stream for reading and writing.<br /> // Stream stream = client.GetStream();<br /> NetworkStream stream = client.GetStream();<br /> // Send the message to the connected TcpServer.<br /> stream.Write(data, 0, data.Length);<br /> Console.WriteLine("Sent: {0}", message);<br /> // Receive the TcpServer.response.<br /> // Buffer to store the response bytes.<br /> data = new Byte[256];<br /> // String to store the response ASCII representation.<br /> String responseData = String.Empty;<br /> // Read the first batch of the TcpServer response bytes.<br /> Int32 bytes = stream.Read(data, 0, data.Length);<br /> responseData = System.Text.Encoding.ASCII.GetString(data, 0, bytes);<br /> Console.WriteLine("Received: {0}", responseData);<br /> // Close everything.<br /> stream.Close();<br /> client.Close();<br /> }<br /> catch (ArgumentNullException e)<br /> {<br /> Console.WriteLine("ArgumentNullException: {0}", e);<br /> }<br /> catch (SocketException e)<br /> {<br /> Console.WriteLine("SocketException: {0}", e);<br /> }<br /> Console.WriteLine("/n Press Enter to continue...");<br /> Console.Read();<br /> }<br />  

还要注意字符集的选用～

TCPListener的例子

using System;<br /> using System.IO;<br /> using System.Net;<br /> using System.Net.Sockets;<br /> using System.Text;<br /> class MyTcpListener<br /> {<br /> public static void Main()<br /> {<br /> TcpListener server=null;<br /> try<br /> {<br /> // Set the TcpListener on port 13000.<br /> Int32 port = 13000;<br /> IPAddress localAddr = IPAddress.Parse("127.0.0.1");<br /> // TcpListener server = new TcpListener(port);<br /> server = new TcpListener(localAddr, port);<br /> // Start listening for client requests.<br /> server.Start();<br /> // Buffer for reading data<br /> Byte[] bytes = new Byte[256];<br /> String data = null;<br /> // Enter the listening loop.<br /> while(true)<br /> {<br /> Console.Write("Waiting for a connection... ");<br /> // Perform a blocking call to accept requests.<br /> // You could also user server.AcceptSocket() here.<br /> TcpClient client = server.AcceptTcpClient();<br /> Console.WriteLine("Connected!");<br /> data = null;<br /> // Get a stream object for reading and writing<br /> NetworkStream stream = client.GetStream();<br /> int i;<br /> // Loop to receive all the data sent by the client.<br /> while((i = stream.Read(bytes, 0, bytes.Length))!=0)<br /> {<br /> // Translate data bytes to a ASCII string.<br /> data = System.Text.Encoding.ASCII.GetString(bytes, 0, i);<br /> Console.WriteLine("Received: {0}", data);<br /> // Process the data sent by the client.<br /> data = data.ToUpper();<br /> byte[] msg = System.Text.Encoding.ASCII.GetBytes(data);<br /> // Send back a response.<br /> stream.Write(msg, 0, msg.Length);<br /> Console.WriteLine("Sent: {0}", data);<br /> }<br /> // Shutdown and end connection<br /> client.Close();<br /> }<br /> }<br /> catch(SocketException e)<br /> {<br /> Console.WriteLine("SocketException: {0}", e);<br /> }<br /> finally<br /> {<br /> // Stop listening for new clients.<br /> server.Stop();<br /> }</p> <p> Console.WriteLine("/nHit enter to continue...");<br /> Console.Read();<br /> }<br /> }<br />