//Socket基本編程
//服務端：
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資源。
protected override void Dispose( bool disposing )
{
try
{
socket.Close();//釋放資源
mythread.Abort ( ) ;//中止線程
}
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);
}
//開始監聽
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);
}
}
//客戶端：
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);
}
基於TCP協議的發送和接收端
TCP協議的接收端
using System.Net.Sockets ; //使用到TcpListen類
using System.Threading ; //使用到線程
using System.IO ; //使用到StreamReader類
int port = 8000; //定義偵聽端口號
private Thread thThreadRead; //創建線程，用以偵聽端口號，接收信息
private TcpListener tlTcpListen; //偵聽端口號
private bool blistener = true; //設定標示位，判斷偵聽狀態
private NetworkStream nsStream; //創建接收的基本數據流
private StreamReader srRead;
private System.Windows.Forms.StatusBar statusBar1;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.ListBox listBox1; //從網絡基礎數據流中讀取數據
private TcpClient tcClIEnt ;
private void Listen ( )
{
try
{
tlTcpListen = new TcpListener ( port ) ; //以8000端口號來初始化TcpListener實例
tlTcpListen.Start ( ) ; //開始監聽
statusBar1.Text = "正在監聽" ;
tcClient = tlTcpListen.AcceptTcpClIEnt ( ) ; //通過TCP連接請求
nsStream = tcClIEnt.GetStream ( ) ; //獲取用以發送、接收數據的網絡基礎數據流
srRead=new StreamReader(nsStream);//以得到的網絡基礎數據流來初始化StreamReader實例
statusBar1.Text = "已經連接！";
while( blistener ) //循環偵聽
{
string sMessage = srRead.ReadLine();//從網絡基礎數據流中讀取一行數據
if ( sMessage == "STOP" ) //判斷是否為斷開TCP連接控制碼
{
tlTcpListen.Stop(); //關閉偵聽
nsStream.Close(); //釋放資源
srRead.Close();
statusBar1.Text = "連接已經關閉！" ;
thThreadRead.Abort(); //中止線程
return;
}
string sTime = DateTime.Now.ToShortTimeString ( ) ; //獲取接收數據時的時間
listBox1.Items.Add ( sTime + " " + sMessage ) ;
}
}
catch ( System.Security.SecurityException )
{
MessageBox.Show ( "偵聽失敗！" , "錯誤" ) ;
}
}
//開始監聽
private void button1_Click(object sender, System.EventArgs e)
{
thThreadRead = new Thread ( new ThreadStart ( Listen ) );
thThreadRead.Start();//啟動線程
button1.Enabled=false;
}
// 清理所有正在使用的資源。
protected override void Dispose( bool disposing )
{
try
{
tlTcpListen.Stop(); //關閉偵聽
nsStream.Close();
srRead.Close();//釋放資源
thThreadRead.Abort();//中止線程
}
catch{}
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
TCP協議的發送端
using System.Net.Sockets; //使用到TcpListen類
using System.Threading; //使用到線程
using System.IO; //使用到StreamWriter類
using System.Net; //使用IPAddress類、IPHostEntry類等
private StreamWriter swWriter; //用以向網絡基礎數據流傳送數據
private NetworkStream nsStream; //創建發送數據的網絡基礎數據流
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; //通過它實現向遠程主機提出TCP連接申請
private bool tcpConnect = false; //定義標識符，用以表示TCP連接是否建立
//連接
private void button1_Click(object sender, System.EventArgs e)
{
IPAddress ipRemote ;
try
{
ipRemote = IPAddress.Parse ( textBox1.Text ) ;
}
catch //判斷給定的IP地址的合法性
{
MessageBox.Show ( "輸入的IP地址不合法！" , "錯誤提示！" ) ;
return ;
}
IPHostEntry ipHost ;
try
{
ipHost = Dns.Resolve ( textBox1.Text ) ;
}
catch //判斷IP地址對應主機是否在線
{
MessageBox.Show ("遠程主機不在線！" , "錯誤提示！" ) ;
return ;
}
string sHostName = ipHost.HostName ;
try
{
TcpClient tcpClient = new TcpClIEnt(sHostName,8000);//對遠程主機的8000端口提出TCP連接申請
nsStream = tcpClIEnt.GetStream();//通過申請，並獲取傳送數據的網絡基礎數據流
swWriter = new StreamWriter(nsStream);//使用獲取的網絡基礎數據流來初始化StreamWriter實例
button1.Enabled = false ;
button2.Enabled = true ;
tcpConnect = true ;
statusBar1.Text = "已經連接！" ;
}
catch
{
MessageBox.Show ( "無法和遠程主機8000端口建立連接！" , "錯誤提示！" ) ;
return ;
}
}
//發送
private void button2_Click(object sender, System.EventArgs e)
{
if (textBox2.Text !="")
{
swWriter.WriteLine(textBox2.Text);//刷新當前數據流中的數據
swWriter.Flush();
}
else
{
MessageBox.Show("發送信息不能為空！","錯誤提示！");
}
}
// 清理所有正在使用的資源。
protected override void Dispose( bool disposing )
{
if ( tcpConnect )
{
swWriter.WriteLine ( "STOP" ) ; //發送控制碼
swWriter.Flush (); //刷新當前數據流中的數據
nsStream.Close (); //清除資源
swWriter.Close ();
}
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
