TCP连接之服务器端,涉及到如下三个函数,分别是:

/*****************************
  ** 函数功能:
     服务端监听
  ** 输入参数:    
  ** 输出参数:
 ******************************/
 private void ServerListen(){}

 

/******************************
 ** 函数功能:
    用于与客户端取得连接
 ** 输入参数: 
 ** 输出参数:
 ******************************/
 private void AcceptConnect(){}

 

/******************************
 ** 函数功能:
    接受客户端发回的信息
 ** 输入参数: 
     ar:客户端发回的信息
 ** 输出参数:
 ******************************/
 private void ReadCallback(IasyncResult ar){}

 

三者的关系图如下:

 

具体代码如下:

1、ServerListen()

View Code
 private bool isExit = false;
 TcpListener listener;
  //用于线程同步,初始状态设为非终止状态,使用手动重置方式
 private EventWaitHandle allDone = new EventWaitHandle(false, EventResetMode.ManualReset);

  /******************************
   ** 作者: ***
   ** 变更时间: 2012-12-26
  ******************************/
  #region 服务端监听方法
  private void ServerListen()
  {
      //由于服务器要为多个客户服务,所以需要创建一个线程监听客户端连接请求
     ThreadStart ts = new ThreadStart(AcceptConnect);
      Thread myThread = new Thread(ts);
      myThread.Start();
  }
 #endregion

 

2、AcceptConnect()

View Code
 /******************************
   ** 作者: ***
  ** 变更时间: 2012-12-26
 ******************************/
 #region 与客户机取得连接
 private void AcceptConnect()
 {
      //获取本机所有IP地址 
     IPAddress[] localips = Dns.GetHostAddresses(Dns.GetHostName());
    
      foreach (IPAddress ip in localips)
      {
          //找到本地所有IP地址符合IPV4协议的IP地址
        if (ip.AddressFamily == AddressFamily.InterNetwork)
          {
                IPAddress ip4;
                ip4 = ip;
                listener = new TcpListener(ip4, 5000);
                listener.Start();
                break;
           }
       }

       //引用在异步操作完成时调用的回调方法
     AsyncCallback callback = new AsyncCallback(AcceptTcpClientCallback);

       while (isExit == false)
       {
           //将事件的状态设为非终止
         allDone.Reset();

           //开始一个异步操作接受传入的连接尝试
         listener.BeginAcceptTcpClient(callback, listener);

           //阻塞当前线程,直到收到客户连接信号
         allDone.WaitOne();

            Thread.Sleep(100);
        }
 }
 #endregion

 

3、AcceptTcpClientCallback()

View Code
 /******************************
   ** 作者: ***
  ** 变更时间: 2012-12-26
 ******************************/
 #region 连接客户端的回调函数
 //ar是IAsyncResult类型的接口,表示异步操作的状态是由listener.BeginAcceptTcpClient(callback, listener)传递过来的
 
  private void AcceptTcpClientCallback(IAsyncResult ar)
  {
      //将事件状态设为终止状态,允许一个或多个等待线程继续
     allDone.Set();
      TcpListener myListener = (TcpListener)ar.AsyncState;

      //异步接收传入的连接,并创建新的TcpClient对象处理远程主机通信
     TcpClient client = myListener.EndAcceptTcpClient(ar);
      ReadWriteObject readWriteObject = new ReadWriteObject(client);

      readWriteObject.netStream.BeginRead(readWriteObject.readBytes, 0, readWriteObject.readBytes.Length, ReadCallback, readWriteObject);
   }
 #endregion

 

4、ReadCallback()

View Code
  byte[] tem = new byte[24];
  byte[] Msgbody;
  byte[] ErrorEndTime;
  ByteToObject bytetoobject = new ByteToObject();

  /******************************
   ** 作者: ***
   ** 变更时间: 2012-12-02
  ******************************/
  #region 接收客户端发来的信息,ar为异步方法下客户端发回的信息
  private void ReadCallback(IAsyncResult ar)
  {
        ReadWriteObject readWriteObject = (ReadWriteObject)ar.AsyncState;
        int length = readWriteObject.netStream.EndRead(ar);
        tem = new byte[24];
        Array.Copy(readWriteObject.readBytes, 0, tem, 0, 24);

        //MsgHead为自定义的结构体
        MsgHead msghead = (MsgHead)bytetoobject.BytesToStuct(tem, typeof(MsgHead));
       if (length > 0 && msghead.Sync == 0x4D)
       {
           switch (msghead.MsgType)
           {
                //根据收到的信息的头部来执行下面的操作
           }
       }          
  }

 

 

 

posted on 2013-04-08 09:27  guolebin7  阅读(8704)  评论(3编辑  收藏  举报