• socket基础示例(一)


    //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; 
    
    // do 
    
    // { 
    
    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(); 
    
    // } 
    
    // while(byteMessage!=null); 
    
    } 
    
    
    
    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 ); 
    
    } 
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  • 原文地址:https://www.cnblogs.com/mingxuantongxue/p/4015083.html
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