socket编程 tcp/ip

客户端代码

using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.IO;
using System.Net.Sockets;
namespace client
{
class Program
{
static void Main(string[] args)
{
try
{
//创建客户端socket，使用tcp通信协议
TcpClient TcpClient = new TcpClient();
TcpClient.Connect("127.0.0.1", 8888);   //指定地址与端口号

Console.WriteLine("Connect Complete");
Console.WriteLine("Input string:");

//Connect方法使用指定的IP地址和端口号将客户端连接到远程TCP主机
//读入控制台输入的文字
String str = Console.ReadLine();

Stream stm = TcpClient.GetStream();

//Unity3D教程手册：www.unitymanual.com
//定义数据流，用于发送和接收数据
ASCIIEncoding AS = new ASCIIEncoding();

//将字符串转换为byte类型
byte[] b = AS.GetBytes(str);

//Write(参数1，参数2，参数3)表示向服务端发送字符串
//参数1指将此数组复制到当前流，参数2指从零开始的字节偏移量，参数3指要写入当前流的字节数(即字符串长度)
stm.Write(b, 0, b.Length);

Console.WriteLine("Send Complete");
//Unity3D教程手册：www.unitymanual.com

//stm.Read在当前流中读入服务端发来的响应信息，其参数与Write方法参数一致，k值为读入字符串的长度
byte[] bb = new byte[100];
int k = stm.Read(bb, 0, 100);
for (int i = 0; i < k; i++)
Console.Write(Convert.ToChar(bb[i]));
TcpClient.Close();

//释放TcpClient实例，并不关闭基础连接
Console.ReadLine();
}
catch (Exception e)
{
Console.WriteLine("Error!" + e.StackTrace);
}
}
}
}
服务端代码

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)
{
try
{
//创建listener，ip-地址，port-端口
IPAddress Ip = IPAddress.Parse("127.0.0.1");
TcpListener TcpList = new TcpListener(Ip, 8888);
TcpList.Start();

Console.WriteLine("Server start!");
Console.WriteLine("Ip address:" + TcpList.LocalEndpoint);
//LocalEndpoint获取服务端(即本地)地址与端口等信息
Console.WriteLine("Wait");

//获取监听到的socket
Socket Soc = TcpList.AcceptSocket();

Console.WriteLine("Received Connection:" + Soc.RemoteEndPoint);

//接收到的信息    //Unity3D教程手册：www.unitymanual.com
byte[] b = new byte[100];
//Soc.Receive(b)从socket接收数据，将数据存入接收缓冲区列表中，k的值为该数据的长度
int k = Soc.Receive(b);
Console.WriteLine("Received data from client:");
for (int i = 0; i < k; i++)
//Convert.ToChar(b)将数组b转换基本数据类型为char的类型并输出
Console.Write(Convert.ToChar(b[i]));

//发送信息
//ASCIIEncoding表示Unicode字符的ASCII字符编码类
ASCIIEncoding AS = new ASCIIEncoding();

//Unity3D教程手册：www.unitymanual.com
//Soc.Send向客户端发送数据，AS.GetBytes()获得括号中字符串的bytes值
Soc.Send(AS.GetBytes("Received data!"));

//关闭连接并释放所有关联的资源
Soc.Close();

//关闭侦听
TcpList.Stop();

//等待输入，起到暂停的作用
Console.ReadLine();

}
catch(Exception e)
{
Console.WriteLine("Error!" + e.StackTrace);
//获取当前异常发生时调用堆栈上的帧的字符串
}
}
}
}