异步TCP连接服务器端

TcpTranslate 为传输辅助类,此外代码不全.待续.....

using System;
using System.IO;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.Collections.Generic;

namespace SocketServer
...{
    /**//// <summary>
    /// 网络通讯事件模型委托
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e">与客户端的连接类</param>
    public delegate void NetEvent(object sender, TcpTranslate e);

    /**//// <summary>
    /// 监听端口,接受多客户的TCP连接
    /// </summary>
    public class TcpServer
    ...{
        事件定义#region 事件定义
        /**//// <summary>
        /// 接收客户端连接事件
        /// </summary>
        public event NetEvent Connected;
        /**//// <summary>
        /// 与客户端连接断开事件
        /// </summary>
        public event NetEvent DisConnect;
        #endregion

        字段#region 字段
        private int _maxsockets = 1000;                  //最大客户连接数
        private IPEndPoint _iep;                         //监听终结点
        private TcpListener _listener;                   //监听类
        private Dictionary<EndPoint, TcpTranslate> _session;
        #endregion

        属性#region 属性
        /**//// <summary>
        /// 当前客户连接数
        /// </summary>
        public int ConnectCount
        ...{
            get ...{ return _session.Count; }
        }
        /**//// <summary>
        /// 与客户连接的所有Socket
        /// </summary>
        public Dictionary<EndPoint, TcpTranslate> Session
        ...{
            get ...{ return _session; }
        }
        #endregion

        构造函数#region 构造函数
        /**//// <summary> 
        /// 构造函数
        /// </summary> 
        /// <param name="port">监听的端口号</param> 
        /// <param name="maxsocket">最大客户连接量</param> 
        public TcpServer(int maxsockets, string IP, int port)
        ...{
            _maxsockets = maxsockets;
            _iep = new IPEndPoint(IPAddress.Parse(IP), port);
        }
        public TcpServer(int port)
            : this(1000, "0.0.0.0", port)
        ...{
        }
        #endregion

        公用方法#region 公用方法
        /**//// <summary> 
        /// 启动服务器程序,开始监听客户端请求
        /// </summary> 
        public void Start()
        ...{
            _session = new Dictionary<EndPoint, TcpTranslate>();
            _listener = new TcpListener(_iep);
            _listener.Start(10);
            //监听客户端连接请求 
            _listener.BeginAcceptSocket(
                new AsyncCallback(clientConnect), _listener);            
        }
        private void clientConnect(IAsyncResult ar)
        ...{
            //接受客户的连接,得连接Socket
            Socket _socket = _listener.EndAcceptSocket(ar);
            TcpTranslate trans = new TcpTranslate(_socket);
            trans.DisConnect += new NetEvent(trans_DisConnect);
            //开始接受数据
            trans.StartReceive();

            //客户端连接成功事件 
            if (Connected != null) Connected(this, trans);
            TcpTranslate.WriteLine(trans.RemoteEndPoint.ToString() + " is Connection...Num" + _session.Count.ToString());
            if (_session.ContainsKey(trans.RemoteEndPoint))
            ...{
                _session[trans.RemoteEndPoint] = trans;
            }
            else
            ...{
                _session.Add(trans.RemoteEndPoint, trans);
            }
            if (ConnectCount < _maxsockets)
            ...{
                //继续监听客户端连接请求 
                _listener.BeginAcceptSocket(
                    new AsyncCallback(clientConnect), _listener);
            }
            else
            ...{   //达到最大连接客户数,则关闭监听.
                _listener.Stop();
            }
        }

        //客户端断开连接
        void trans_DisConnect(object sender, TcpTranslate trans)
        ...{
            //如果已关闭侦听器,则打开,继续监听
            if (ConnectCount == _maxsockets)
            ...{
                _listener.Start(1);
                _listener.BeginAcceptSocket(
                    new AsyncCallback(clientConnect), _listener);
            }
            _session.Remove(trans.RemoteEndPoint);
            //触发客户断开事件
            if (DisConnect != null) ...{ DisConnect(this, trans); }
            TcpTranslate.WriteLine(trans.RemoteEndPoint.ToString() + " is DisConnect...Num" + _session.Count.ToString());
        }
        #endregion
    }
}