在网上看了一个简单的例子,编译运行一切正常,但我在服务器端使用/*************************/
Socket temp = s.Accept();//为新建连接创建新的Socket。
Console.WriteLine("remoteEndpoin {0}",temp.RemoteEndPoint.ToString());
/*************************/输出客户端的ip地址和端口号时,ip地址是对的 127.0.0.1
但端口号却是个随机值 ,这是什么原因?代码如下
/******************************************************************/
服务器端:
using System;
using System.Collections.Generic;
using System.Text;using System.IO;
using System.Net;
using System.Net.Sockets;namespace socket
{
class serverApp
{
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);
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("remoteEndpoin {0}",temp.RemoteEndPoint.ToString());
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("Server Get Message:{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(); }
}
}/******************************************************************/
客户端
using System;
using System.Collections.Generic;
using System.Text;using System.IO;
using System.Net;
using System.Net.Sockets;namespace client
{
class clientApp
{
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("Send Message");
c.Send(bs, bs.Length, 0);//发送测试信息
string recvStr = "";
byte[] recvBytes = new byte[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("Client Get Message:{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("Press Enter to Exit");
Console.ReadLine(); }
}
}
Socket temp = s.Accept();//为新建连接创建新的Socket。
Console.WriteLine("remoteEndpoin {0}",temp.RemoteEndPoint.ToString());
/*************************/输出客户端的ip地址和端口号时,ip地址是对的 127.0.0.1
但端口号却是个随机值 ,这是什么原因?代码如下
/******************************************************************/
服务器端:
using System;
using System.Collections.Generic;
using System.Text;using System.IO;
using System.Net;
using System.Net.Sockets;namespace socket
{
class serverApp
{
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);
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("remoteEndpoin {0}",temp.RemoteEndPoint.ToString());
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("Server Get Message:{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(); }
}
}/******************************************************************/
客户端
using System;
using System.Collections.Generic;
using System.Text;using System.IO;
using System.Net;
using System.Net.Sockets;namespace client
{
class clientApp
{
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("Send Message");
c.Send(bs, bs.Length, 0);//发送测试信息
string recvStr = "";
byte[] recvBytes = new byte[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("Client Get Message:{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("Press Enter to Exit");
Console.ReadLine(); }
}
}
string host = "127.0.0.1";
服务端的代码是指定要监听哪个IP和端口,客户端的代码是指定要连接哪个IP和端口。