C#使用Socket实现心跳的方法示例-创新互联

Server端代码：

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class Program
{
  static SocketListener listener;
 
  public static void Main(string[] args)
  {
    //实例化Timer类，设置间隔时间为5000毫秒；
    System.Timers.Timer t = new System.Timers.Timer(5000);
    t.Elapsed += new System.Timers.ElapsedEventHandler(CheckListen);
    //到达时间的时候执行事件； 
    t.AutoReset = true;
    t.Start();
 
    listener = new SocketListener();
    listener.ReceiveTextEvent += new SocketListener.ReceiveTextHandler(ShowText);
    listener.StartListen();
 
    Console.ReadKey();
  }
 
  private static void ShowText(string text)
  {
    Console.WriteLine(text);
  }
 
  private static void CheckListen(object sender, System.Timers.ElapsedEventArgs e)
  {
    if (listener != null && listener.Connection != null)
    {
      Console.WriteLine("连接数：" + listener.Connection.Count.ToString());
    }
  }
}
 
public class Connection
{
  Socket _connection;
 
  public Connection(Socket socket)
  {
    _connection = socket;
  }
 
  public void WaitForSendData(object connection)
  {
    try
    {
      while (true)
      {
        byte[] bytes = new byte[1024];
        string data = "";
 
        //等待接收消息
        int bytesRec = this._connection.Receive(bytes);
 
        if (bytesRec == 0)
        {
          // ReceiveText("客户端[" + _connection.RemoteEndPoint.ToString() + "]连接关闭...");
          break;
        }
 
        data += Encoding.UTF8.GetString(bytes, 0, bytesRec);
        ReceiveText("收到消息：" + data);
 
        string sendStr = "服务端已经收到信息！";
        byte[] bs = Encoding.UTF8.GetBytes(sendStr);
        _connection.Send(bs, bs.Length, 0);
      }
    }
    catch (Exception)
    {
      ReceiveText("客户端[" + _connection.RemoteEndPoint.ToString() + "]连接已断开...");
      Hashtable hConnection = connection as Hashtable;
      if (hConnection.Contains(_connection.RemoteEndPoint.ToString()))
      {
        hConnection.Remove(_connection.RemoteEndPoint.ToString());
      }
    }
  }
 
  public delegate void ReceiveTextHandler(string text);
  public event ReceiveTextHandler ReceiveTextEvent;
  private void ReceiveText(string text)
  {
    if (ReceiveTextEvent != null)
    {
      ReceiveTextEvent(text);
    }
  }
}
 
public class SocketListener
{
  public Hashtable Connection = new Hashtable();
 
  public void StartListen()
  {
  Agine:
    try
    {
      //端口号、IP地址
      //int port = 8889;
      //string host = "127.0.0.1";
      //IPAddress ip = IPAddress.Parse(host);
      //IPEndPoint ipe = new IPEndPoint(ip, port);
      string ip = string.Empty;
      System.Net.IPHostEntry IpEntry = System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName());
      for (int i = 0; i != IpEntry.AddressList.Length; i++)
      {
        if (!IpEntry.AddressList[i].IsIPv6LinkLocal)
        {
          ip = IpEntry.AddressList[i].ToString();
        }
      }
      IPEndPoint ipend = new IPEndPoint(IPAddress.Parse(ip), 6000);
      //创建一个Socket类
      Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
      s.Bind(ipend);//绑定2000端口
      s.Listen(0);//开始监听
 
      ReceiveText("启动Socket监听...");
 
      while (true)
      {
        Socket connectionSocket = s.Accept();//为新建连接创建新的Socket
 
        ReceiveText("客户端[" + connectionSocket.RemoteEndPoint.ToString() + "]连接已建立...");
 
        Connection gpsCn = new Connection(connectionSocket);
        gpsCn.ReceiveTextEvent += new Connection.ReceiveTextHandler(ReceiveText);
 
        Connection.Add(connectionSocket.RemoteEndPoint.ToString(), gpsCn);
 
        //在新线程中启动新的socket连接，每个socket等待，并保持连接
        Thread thread = new Thread(gpsCn.WaitForSendData);
        thread.Name = connectionSocket.RemoteEndPoint.ToString();
        thread.Start(Connection);
      }
    }
    catch (ArgumentNullException ex1)
    {
      ReceiveText("ArgumentNullException:" + ex1);
    }
    catch (SocketException ex2)
    {
      ReceiveText("SocketException:" + ex2);
    }
 
    goto Agine;
  }
 
  public delegate void ReceiveTextHandler(string text);
  public event ReceiveTextHandler ReceiveTextEvent;
  private void ReceiveText(string text)
  {
    if (ReceiveTextEvent != null)
    {
      ReceiveTextEvent(text);
    }
  }
}

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