[C#] Socket编程实例

来源:互联网 发布:csgo优化调节画面设置 编辑:程序博客网 时间:2024/04/28 23:34
[C#] Socket编程实例
2008-05-30 23:15

//Socket基本编程
//服务端:
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
Thread mythread ;
Socket socket;

// 清理所有正在使用的资源。
protected override void Dispose( bool disposing )
{
 try
 {   
  socket.Close();//释放资源
  mythread.Abort ( ) ;//中止线程
 }
 catch{ }
 if( disposing )
 {
  if (components != null)
  {
   components.Dispose();
  }
 }
 base.Dispose( disposing );
}

public static IPAddress GetServerIP()
{
 IPHostEntry ieh=Dns.GetHostByName(Dns.GetHostName());
 return ieh.AddressList[0];
}

private void BeginListen()
{
 IPAddress ServerIp=GetServerIP();
 IPEndPoint iep=new IPEndPoint(ServerIp,8000);
 socket=new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
 byte[] byteMessage=new byte[100];
 this.label1.Text=iep.ToString();
 socket.Bind(iep);
 // do
 while(true)
 {
  try
  {
   socket.Listen(5);
   Socket newSocket=socket.Accept();
   newSocket.Receive(byteMessage);
   string sTime = DateTime.Now.ToShortTimeString ( ) ;
   string msg=sTime+":"+"Message from:";
   msg+=newSocket.RemoteEndPoint.ToString()+Encoding.Default.GetString(byteMessage);
   this.listBox1.Items.Add(msg);
 }
  catch(SocketException ex)
  {
   this.label1.Text+=ex.ToString();
  }
 } // while(byteMessage!=null);
}

//开始监听
private void button1_Click(object sender, System.EventArgs e)
{
 try
 {
  mythread = new Thread(new ThreadStart(BeginListen));
  mythread.Start();
 }
 catch(System.Exception er)
 {
  MessageBox.Show(er.Message,"完成",MessageBoxButtons.OK,MessageBoxIcon.Stop);
 }
}

//客户端:
using System.Net;
using System.Net.Sockets;
using System.Text;

private void button1_Click(object sender, System.EventArgs e)
{
 BeginSend();
}

private void BeginSend()
{
 string ip=this.txtip.Text;
 string port=this.txtport.Text;
 IPAddress serverIp=IPAddress.Parse(ip);
 int serverPort=Convert.ToInt32(port);
 IPEndPoint iep=new IPEndPoint(serverIp,serverPort);
 byte[] byteMessage;
 Socket socket=new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
 socket.Connect(iep);
 byteMessage=Encoding.ASCII.GetBytes(textBox1.Text);
 socket.Send(byteMessage);
 socket.Shutdown(SocketShutdown.Both);
 socket.Close();
}

//基于TCP协议的发送和接收端
//TCP协议的接收端
using System.Net.Sockets ; //使用到TcpListen类
using System.Threading ; //使用到线程
using System.IO ; //使用到StreamReader类

int port = 8000; //定义侦听端口号
private Thread thThreadRead; //创建线程,用以侦听端口号,接收信息
private TcpListener tlTcpListen; //侦听端口号
private bool blistener = true; //设定标示位,判断侦听状态
private NetworkStream nsStream; //创建接收的基本数据流
private StreamReader srRead;
private System.Windows.Forms.StatusBar statusBar1;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.ListBox listBox1; //从网络基础数据流中读取数据
private TcpClient tcClient ;

private void Listen ( )
{
 try
 {
  tlTcpListen = new TcpListener ( port ) ; //以8000端口号来初始化TcpListener实例
  tlTcpListen.Start ( ) ; //开始监听
  statusBar1.Text = "正在监听" ;
  tcClient = tlTcpListen.AcceptTcpClient ( ) ; //通过TCP连接请求
  nsStream = tcClient.GetStream ( ) ; //获取用以发送、接收数据的网络基础数据流
  srRead=new StreamReader(nsStream);//以得到的网络基础数据流来初始化StreamReader实例
  statusBar1.Text = "已经连接!";
  while( blistener ) //循环侦听
  {
   string sMessage = srRead.ReadLine();//从网络基础数据流中读取一行数据
   if ( sMessage == "STOP" ) //判断是否为断开TCP连接控制码
   {
    tlTcpListen.Stop(); //关闭侦听
    nsStream.Close(); //释放资源
    srRead.Close();
    statusBar1.Text = "连接已经关闭!" ;
    thThreadRead.Abort(); //中止线程
    return;
   }
   string sTime = DateTime.Now.ToShortTimeString ( ) ; //获取接收数据时的时间
   listBox1.Items.Add ( sTime + " " + sMessage ) ;
  }
 }
 catch ( System.Security.SecurityException )
 {
  MessageBox.Show ( "侦听失败!" , "错误" ) ;
 }
}

//开始监听
private void button1_Click(object sender, System.EventArgs e)
{
 thThreadRead = new Thread ( new ThreadStart ( Listen ) );
 thThreadRead.Start();//启动线程
 button1.Enabled=false;
}

// 清理所有正在使用的资源。
protected override void Dispose( bool disposing )
{
 try
 {
  tlTcpListen.Stop(); //关闭侦听
  nsStream.Close();
  srRead.Close();//释放资源
  thThreadRead.Abort();//中止线程
 }
 catch{}
 if( disposing )
 {
  if (components != null)
  {
   components.Dispose();
  }
 }
 base.Dispose( disposing );
}

//TCP协议的发送端
using System.Net.Sockets; //使用到TcpListen类
using System.Threading; //使用到线程
using System.IO; //使用到StreamWriter类
using System.Net; //使用IPAddress类、IPHostEntry类等

private StreamWriter swWriter; //用以向网络基础数据流传送数据 
private NetworkStream nsStream; //创建发送数据的网络基础数据流 
private TcpClient tcpClient;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.TextBox textBox2;
private System.Windows.Forms.StatusBar statusBar1;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.Label label2; //通过它实现向远程主机提出TCP连接申请 
private bool tcpConnect = false; //定义标识符,用以表示TCP连接是否建立

//连接 
private void button1_Click(object sender, System.EventArgs e)
{
 IPAddress ipRemote ;
 try
 {
  ipRemote = IPAddress.Parse ( textBox1.Text ) ;
 }
 catch //判断给定的IP地址的合法性
 {
  MessageBox.Show ( "输入的IP地址不合法!" , "错误提示!" ) ;
  return ;
 }
 IPHostEntry ipHost ;
 try
 {
  ipHost = Dns.Resolve ( textBox1.Text ) ; 
 }
 catch //判断IP地址对应主机是否在线
 {
  MessageBox.Show ("远程主机不在线!" , "错误提示!" ) ;
  return ;
 }
 string sHostName = ipHost.HostName ;
 try
 {
  TcpClient tcpClient = new TcpClient(sHostName,8000);//对远程主机的8000端口提出TCP连接申请
  nsStream = tcpClient.GetStream();//通过申请,并获取传送数据的网络基础数据流  
  swWriter = new StreamWriter(nsStream);//使用获取的网络基础数据流来初始化StreamWriter实例
  button1.Enabled = false ;
  button2.Enabled = true ;
  tcpConnect = true ;
  statusBar1.Text = "已经连接!" ;
 }
 catch
 {
  MessageBox.Show ( "无法和远程主机8000端口建立连接!" , "错误提示!" ) ;
  return ;
 }
}

//发送
private void button2_Click(object sender, System.EventArgs e)
{
 if (textBox2.Text !="")
 {
  swWriter.WriteLine(textBox2.Text);//刷新当前数据流中的数据
  swWriter.Flush();
 }
 else
 {
  MessageBox.Show("发送信息不能为空!","错误提示!");
 }
}

// 清理所有正在使用的资源。
protected override void Dispose( bool disposing )
{
 if ( tcpConnect )
 {
  swWriter.WriteLine ( "STOP" ) ; //发送控制码  
  swWriter.Flush (); //刷新当前数据流中的数据  
  nsStream.Close (); //清除资源
  swWriter.Close ();
 }
 if( disposing )
 {
  if (components != null)
  {
   components.Dispose();
  }
 }
 base.Dispose( disposing );
}

(完)

原创粉丝点击