C#.NET Socket编程例程.doc

/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.AddressList0; private void BeginListen() IPAddress ServerIp=GetServerIP(); IPEndPoint iep=new IPEndPoint(ServerIp,8000); socket=new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp); byte byteMessage=new byte100; 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！);