C#最基本的Socket编程

示例程序是同步套接字程序，功能很简单，只是客户端发给服务器一条信息，服务器向客户端返回一条信息，是一个简单示例，也是一个最基本的socket编程流程。

简单步骤说明：

1.用指定的port, ip 建立一个endpoint对象

2.建立一个socket对象；

3.用socket对象的bind()方法绑定endpoint

4.用socket对象的listen()方法开始监听

5.接收到客户端的连接，用socket对象的access()方法创建新的socket对象用于和请求的客户端进行通信

6.通信结束后记得关闭socket

代码：

 1  int port = 2000;
 2             string host = "127.0.0.1";
 3             // create endpoint 
 4             ipaddress ip = ipaddress.parse(host);
 5             ipendpoint ipe = new ipendpoint(ip, port);
 6             socket s = new socket(addressfamily.internetwork, sockettype.stream, protocoltype.tcp);
 7             s.bind(ipe);
 8 
 9             s.listen(0);
10 
11             console.writeline("wait a client to connect..");
12             socket temp = s.accept();
13             console.writeline("create a connection");
14 
15             //receive message
16             string recvstr = "";
17             byte[] recvbytes= new byte[1024];
18             int bytes;
19             bytes = temp.receive(recvbytes, recvbytes.length, 0);
20             recvstr += encoding.ascii.getstring(recvbytes, 0, bytes);
21             console.writeline("server have get message:{0}",recvstr );
22 
23             // send message
24             string sendstr = "ok! client send message cuccessful";
25             byte[] bs = encoding.ascii.getbytes(sendstr);
26             temp.send(bs, bs.length, 0);
27 
28             //end
29             temp.close();
30             s.close();
31         
32             console.writeline("end socket com!");
33             console.readline();

 

 

 

 客户端：

1.用指定的port, ip 建立一个endpoint对象

2.建立一个socket对象

3.用socket对象的connect()方法以上面的endpoint对象作为参数，向服务器发送连接请求；

4.如果连接成功，就用socket对象的send()方法向服务器发送信息

5.用socket对象的receive()方法接收服务器发来的信息

6.通信结束记得关闭socket：

代码：：

//init server port and ip
                int port = 2000;
                string host = "127.0.0.1";
                ipaddress ip = ipaddress.parse(host);

                // create ipendpoint
                ipendpoint ipe = new ipendpoint(ip, port);

                // create client sockets
                socket c = new socket(addressfamily.internetwork, sockettype.stream, protocoltype.tcp);
                console.writeline("connecting...");
                
                // connect to server
                c.connect(ipe);
                
                // send to server
                string sendstr = "hello, this is a socket test";
                byte[] bs = encoding.ascii.getbytes(sendstr);
                console.writeline("send message");
                c.send(bs, bs.length, 0);

                // receive a message from server
                string recvstr = "";
                byte[] recvbytes = new byte[1024];
                int bytes;
                bytes = c.receive(recvbytes, recvbytes.length, 0);

                recvstr += encoding.ascii.getstring(recvbytes, 0, bytes);
                console.writeline("client get message:{0}", recvstr);

                //close client
                c.close();

            }
            catch (argumentexception e)
            {

                console.writeline("argumentnullexception:{0}",e);
            }
            catch (socketexception e)
            {
                console.writeline("socketexception:{0}",e);
            }
            console.writeline("press enter to exit");
            console.readline();

来源：内容来自网络