C-Sharp网络编程案例解析（Socket类的使用）
Server端：
using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.Net.Sockets;
namespace Server
{
class Program
{
static void Main(string[] args)
{
//用于表示客户端发送的信息的长度
int recvLenth;
//用于缓存客户端所发送的信息，通过socket传递的信息必须为字节数组
byte[] data=new byte[1024];
//本机预使用的IP和端口
IPEndPoint iend = new IPEndPoint(IPAddress.Any,9999);
Socket newsock = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
newsock.Bind(iend);
newsock.Listen(10);
Console.WriteLine("waiting for a client !");
Socket client = newsock.Accept();
//当有可用的客户端连接尝试时执行，并返回一个新的socket，用于与客户端之间的通信
IPEndPoint clientAdd = (IPEndPoint)client.RemoteEndPoint;//获取远程终结点
Console.WriteLine("连接："+clientAdd.Address+"端口："+clientAdd.Port);//获取或设置终结点端口号
string welcome = "welcome here !";
data = Encoding.ASCII.GetBytes(welcome);
client.Send(data,data.Length,SocketFlags.None);//指定套接字的发送和接收行为
while(true)
{
data=new byte[1024];
recvLenth = client.Receive(data);
if(recvLenth==0)//信息长度为0，说明客户端连接断开
{
break;
}
Console.WriteLine(Encoding.ASCII.GetString(data,0,recvLenth));
client.Send(data,recvLenth,SocketFlags.None);
}
Console.WriteLine("断开连接"+clientAdd.Address);
client.Close();
newsock.Close();
}
}
}
Client端：
using System;
using System.Collections.Generic;
using System.Text;
using System.Net.Sockets;
using System.Net;
namespace Client
{
class Program
{
static void Main(string[] args)
{
byte[] data=new byte[1024];
Socket newclient = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
Console.WriteLine("输入服务器地址：");
string ipadd = Console.ReadLine();
Console.WriteLine();
Console.Write("输入服务器端口：");
int port = Convert.ToInt32(Console.ReadLine());
IPEndPoint ie = new IPEndPoint(IPAddress.Parse(ipadd),port);//服务器的ip和端口
try
{
//因为客户端只是用来向特定的服务器发送信息，所以不需要绑定本机的ip和端口，也不需要监听
newclient.Connect(ie);
}
catch(SocketException ex)
{
Console.WriteLine("不能连接");
Console.WriteLine(ex.ToString());
return;
}
int recv = newclient.Receive(data);
string stringdata = Encoding.ASCII.GetString(data,0,recv);
Console.WriteLine(stringdata);
while(true)
{
string input = Console.ReadLine();
if(input=="exit")
{
break;
}
newclient.Send(Encoding.Default.GetBytes(input));
data=new byte[1024];
recv = newclient.Receive(data);
stringdata = Encoding.Default.GetString(data,0,recv);
Console.WriteLine(stringdata);
}
Console.WriteLine("断开连接");
newclient.Shutdown(SocketShutdown.Both);
newclient.Close();
}
}
}
