c# socket 实例

下面是一个完整的例子，client向server发送一段测试字符串，server接收并显示出来，给予client成功响应。

//client.cs

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

namespace client
{
       class class1

      {
           static void Main(string[] args)
           {
              try
              {
                int port = 2000;
                string host = "127.0.0.1";
                IPAddress ip = IPAddress.Parse(host);
                IPEndPoint ipe = new IPEndPoint(ip,port);//把ip和端口转化为IPEndPoint实例
                Socket c = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);//创建一个Socket
                Console.WriteLine("Conneting...");
                c.Connect(ipe);//连接到服务器
                string sendStr="hello!This is a socket test";
                byte[] bs=Encoding.ASCII.GetBytes(sendStr);
                Console.WriteLine("SendMessage");
                c.Send(bs,bs.Length,0);//发送测试信息
                string recvStr="";
                byte[]recvBytes = newbyte[1024];
                int bytes;
                bytes = c.Receive(recvBytes,recvBytes.Length,0);//从服务器端接受返回信息
                recvStr += Encoding.ASCII.GetString(recvBytes,0,bytes);
                Console.WriteLine("ClientGetMessage:{0}",recvStr);//显示服务器返回信息
                c.Close();
              }
              catch(ArgumentNullException e)
              {
                Console.WriteLine("ArgumentNullException:{0}",e);
              }
              catch(SocketException e)
              {
                Console.WriteLine("SocketException:{0}",e);
              }
              Console.WriteLine("PressEntertoExit");
              Console.ReadLine();
            }       
       }
}

 

//server.cs

//server端
using System;
using System.Text;
using System.IO;
using System.Net;
using System.Net.Sockets;
namespace sever{
class Class2
{
static void Main()
{
try
{
int port = 2000;
string host = "127.0.0.1";
IPAddress ip = IPAddress.Parse(host);
IPEndPoint ipe = new IPEndPoint(ip,port);
Socket s = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);//创建一个Socket类
s.Bind(ipe);//绑定2000端口
s.Listen(0);//开始监听
Console.WriteLine("Wait for connect");
Socket temp = s.Accept();//为新建连接创建新的Socket。
Console.WriteLine("Get a connect");
string recvStr = "";
byte[] recvBytes = new byte[1024];
int bytes;
bytes = temp.Receive(recvBytes,recvBytes.Length,0);//从客户端接受信息
recvStr += Encoding.ASCII.GetString(recvBytes,0,bytes);
Console.WriteLine("ServerGetMessage:{0}",recvStr);//把客户端传来的信息显示出来
string sendStr = "Ok! Client Send Message Sucessful!";
byte[] bs = Encoding.ASCII.GetBytes(sendStr);
temp.Send(bs,bs.Length,0);//返回客户端成功信息
temp.Close();
s.Close();
}
catch(ArgumentNullException e)
{
Console.WriteLine("ArgumentNullException:{0}",e);
}
catch(SocketException e)
{
Console.WriteLine("SocketException:{0}",e);
}
Console.WriteLine("Press Enter to Exit");
Console.ReadLine();
}
}
}