何为协议？先撇开专业术语不说，顾名思义，就是相互合作的暗语（不怕公开的话），
比如，假如我俩商量好了，1+1=22，当我写1+1的时候，你如果写2，那就
违反协议了...
同理，做底层开发的时候，先必须定义好 Client 与 Server(或者 Client) 的协作符号，
比如，
A : 要計算1+1=22；
B: 要計算2+2=44;
exit : 退出；
用C#開發，，代碼如下：
class Program
{
static void Main(string[] args)
{
AppDomain.CreateDomain("socketServer").DoCallBack(
delegate
{
byte[] result = new byte[1024];
int myport = 8889;
IPAddress ip = IPAddress.Parse("192.168.2.136");
IPEndPoint ipe = new IPEndPoint(ip,myport);
Socket serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream,
ProtocolType.Tcp);
serverSocket.Bind(ipe);
serverSocket.Listen(1);
Console.WriteLine("已經啟動監聽！");
Thread myThread = new Thread(new ThreadStart(delegate {
while (true)
{
Socket clientsocket = serverSocket.Accept();
clientsocket.Send(Encoding.UTF8.GetBytes("您好！,您已經與我取得聯繫了！"));
Thread receiveThread = new Thread(delegate(object clientSocket) {
Socket myClientSocket = (Socket)clientSocket;
string casestr ="";
while (true)
{
int receiveNumber = myClientSocket.Receive(result);
//Console.WriteLine("接受客戶端{0}消息{1}", myClientSocket.RemoteEndPoint.ToString(), Encoding.UTF8.GetString(result, 0, receiveNumber));
casestr = Encoding.UTF8.GetString(result, 0, receiveNumber);
switch ( casestr)
{
case "A":
Console.WriteLine("1+1=22");
break;
case "B":
Console.WriteLine("2+2=44");
break;
default:
Console.WriteLine("無此協議");
break;
}
}
});
receiveThread.Start(clientsocket);
}
}));
myThread.Start();
});
IPAddress IPCL = IPAddress.Parse("192.168.2.136");
Socket CLSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
CLSocket.Connect(new IPEndPoint(IPCL,8889));
Console.WriteLine("鏈接服務成功\r\n");
byte[]rs = new byte[1024];
int receivecount = CLSocket.Receive(rs);
Console.WriteLine("接受消息{0}\r\n", Encoding.UTF8.GetString(rs, 0, receivecount));
//CLSocket.Send(Encoding.UTF8.GetBytes("我是客戶端！\r\n"));
string str = "A";
while (true)
{
if (str == "exit") return;
CLSocket.Send(Encoding.UTF8.GetBytes(str ));
str = Console.ReadLine();
}
}