基于TCP Socket的简单网络通信

本实例是一个基于TCP的简单通讯实例，分为服务器端和客户端，服务器端监听客户端的连接请求，客户端将信息发送给服务器端，而服务器端则回复客户端发送的信息以达到通讯测试：

服务器端代码如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;

namespace SimpleTcpServer
{
class Program
{
static void Main(string[] args)
{
//接收到的数据
int receive;
//定义数据缓冲区
byte [] date=new byte[1024];
//设置终端连接，接收任意请求的IP地址客户终端
IPEndPoint MyIpEndpoint = new IPEndPoint(IPAddress.Any, 13000);
//新建一个服务器套接字
Socket MySocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
//绑定服务端套接字
MySocket.Bind(MyIpEndpoint);
//监听
MySocket.Listen(10);
Console.WriteLine("Waitting for a message from client!");

//获取客户端套接字
Socket Client = MySocket.Accept();
//获取客户端终点
IPEndPoint ClientEndPoint =(IPEndPoint)Client.RemoteEndPoint;
Console.WriteLine("Connect with {0} port {1}",ClientEndPoint.Address,ClientEndPoint.Port.ToString());

//将要发送到客户端的信息进行编码
date = Encoding.ASCII.GetBytes("Welcome to my Server");
//发送信息到客户端
Client.Send(date, date.Length, SocketFlags.None);

//如果接收的信息长度为0，则自动退出循环
while (true)
{
receive = Client.Receive(date);
if (receive==0)
{
break;
}
//接收到的字符
string ReceiveString = Encoding.UTF8.GetString(date, 0, receive);
Console.WriteLine(ReceiveString);
//发送信息到客户端
Client.Send(date, receive, SocketFlags.None);
}
Console.WriteLine("DisConnected with {0}", ClientEndPoint.Address);
Client.Close();
MySocket.Close();
}
}
}

客户端代码如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;

namespace SimpleTcpClient
{
class Program
{
static void Main(string[] args)
{
//缓冲区大小
byte[] data=new byte[1024];
string Input, StringData;
int receive;
//设置连接终端
IPEndPoint MyIpEndpoint = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 13000);
//设置连接服务器的套接字
Socket MyServer=new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
try
{
//连接服务器
MyServer.Connect(MyIpEndpoint);
}
catch
{
Console.WriteLine("Fail to connect to the server!");
return;
}
//接收服务器端发来的信息
receive = MyServer.Receive(data);
//将发来的信息进行转码
StringData = Encoding.UTF8.GetString(data, 0, receive);
Console.WriteLine(StringData);

while (true)
{
//从客户端输入信息
Input = Console.ReadLine();
if (Input=="exit")
{
break;
}
//发送信息到服务端
MyServer.Send(Encoding.UTF8.GetBytes(Input));
//接收服务端的信息
receive = MyServer.Receive(data);
StringData = Encoding.UTF8.GetString(data, 0, receive);
Console.WriteLine("Server: {0}", StringData);
}
//释放资源
Console.WriteLine("Disneccted from Server!");
MyServer.Shutdown(SocketShutdown.Both);
MyServer.Close();
}
}
}

本实例是基于TCP协议的同步网络通讯，后面我们将继续学习基于TCP协议的异步网络通讯。同步网络通讯的优点是简单和易于理解，在通讯量不大的情况下，同步通讯的效率要高于异步通讯，但是同步通讯的缺点也是显而易见的。