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[]; 

} 

private void BeginListen() 

{ 

IPAddress ServerIp=GetServerIP(); 

IPEndPoint iep=new IPEndPoint(ServerIp,); 

socket=new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp); 

byte[] byteMessage=new byte[]; 

this.label1.Text=iep.ToString(); 

socket.Bind(iep); 

// do 

while(true) 

{ 

try 

{ 

socket.Listen(); 

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 = ; //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,);//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 ); 

}