DotNET(C#) Socket基本编程
服务器端：
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);
}
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 );
}
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 ); }