socket 降低cpu 占用率 ，放弃Thread和Whell 循环

1、创建一个消息体的类型

  public enum MessageType : byte
    {
        Unknown = 0,
        Chat = 100,
        Query = 10,
        Identity = 11,
        Online = 20,
        Offline = 0x25
    }

2、 创建一个消息体（结构包）

 public abstract class MessagePackageBase
    {
        private MessageType a;
 
        protected MessagePackageBase(MessageType type)
        {
 
            this.Type = type;
        }
 
        internal static MessageType Aa(byte[] A_0)
        {
            if ((A_0 != null) && (A_0.Length != 0))
            {
                return (MessageType)A_0[0];
            }
            return MessageType.Unknown;
        }
 
        public virtual byte[] GetPackageData()
        {
            return new byte[] { (Byte)Type };
        }
 
        public MessageType Type
        {
            get
            {
                return this.a;
            }
            set
            {
                this.a = value;
            }
        }
    }

3、创建一个处理的包

public class ChatMessagePackage : MessagePackageBase
    {
        public static readonly Encoding Charset;
        private string message;
        private DateTime time;
 
        static ChatMessagePackage()
        {
 
            Charset = Encoding.Default;
        }
 
        public ChatMessagePackage(DateTime time, string message) : base(MessageType.Chat)
        {
 
            this.Time = time;
            this.Message = message;
        }
 
        public static ChatMessagePackage FromPackage(byte[] data)
        {
            try
            {
                byte[] destinationArray = new byte[8];
                Array.Copy(data, 1, destinationArray, 0, 8);
                DateTime time = DateTime.FromBinary(BitConverter.ToInt64(destinationArray, 0));
                return new ChatMessagePackage(time, Charset.GetString(data, destinationArray.Length + 1, (data.Length - destinationArray.Length) - 1));
            }
            catch
            {
                return null;
            }
        }
 
        public override byte[] GetPackageData()
        {
            List<byte> list = new List<byte>(100);
            list.AddRange(base.GetPackageData());
            list.AddRange(BitConverter.GetBytes(this.Time.ToBinary()));
            list.AddRange(Charset.GetBytes(this.Message));
            return list.ToArray();
        }
 
        public string Message
        {
            get
            {
                return message;
            }
            set
            {
                message = value;
            }
        }
 
        public DateTime Time
        {
            get
            {
                return time;
            }
            set
            {
                time = value;
            }
        }

4、创建一个包的事件

public class ChatServerDataReceiveEventArgs : EventArgs
    {
        private IPEndPoint iP;
        private byte[] bytes;
        private MessageType type;
 
        public ChatServerDataReceiveEventArgs(IPEndPoint remoteEP, byte[] data)
        {
 
            this.RemoteEP = remoteEP;
            this.Data = data;
            this.MessageType = MessagePackageBase.Aa(data);
        }
 
        public IPEndPoint RemoteEP
        {
            get
            {
                return iP;
            }
            set
            {
                iP = value;
            }
        }
 
        public byte[] Data
        {
            get
            {
                return bytes;
            }
            set
            {
                bytes = value;
            }
        }
 
        public MessageType MessageType
        {
            get
            {
                return type;
            }
            set
            {
                type = value;
            }
        }
    }

5、身份包

  public class IdentityMessagePackage : MessagePackageBase
    {
        public IdentityMessagePackage() : base(MessageType.Identity)
        {
 
        }
    }

6、离线包

public class OfflineMessagePackage : MessagePackageBase
    {
        public OfflineMessagePackage() : base(MessageType.Offline)
        {
 
        }
    }

7、在线包

   public class OnlineMessagePackage : MessagePackageBase
    {
        public OnlineMessagePackage() : base(MessageType.Online)
        {
 
        }
    }

8、查询包

  public class QueryMessagePackage : MessagePackageBase
    {
        public QueryMessagePackage() : base(MessageType.Query)
        {
 
        }
    }

9、服务端

 public class ChatServer : IDisposable
    {
        public static int Port;
        public static readonly IPAddress BroadcastAddress;
        private UdpClient udp;
        private bool Run;
        private AsyncCallback back;
        public event EventHandler DataReceive;
 
        static ChatServer()
        {
            Port = 2368;
            BroadcastAddress = IPAddress.Parse("255.255.255.255");
        }
        public ChatServer(int port)
        {
 
            Port = port;
            Run = false;
            udp = new UdpClient(Port, AddressFamily.InterNetwork);
            back = new AsyncCallback(Result);
        }
 
        private void Result(IAsyncResult A_0)
        {
            if (Run)
            {
                UdpClient sender = null;
                try
                {
                    sender = (UdpClient)A_0.AsyncState;
                    IPEndPoint remoteEP = new IPEndPoint(IPAddress.Any, 0);
                    byte[] data = sender.EndReceive(A_0, ref remoteEP);
                    EventHandler d = this.DataReceive;
                    if (d != null)
                    {
                        d(sender, new ChatServerDataReceiveEventArgs(remoteEP, data));
                    }
                }
                catch (ObjectDisposedException)
                {
                    sender = null;
                }
                catch
                {
                }
                finally
                {
                    if (Run && (sender != null))
                    {
                        sender.BeginReceive(back, sender);
                    }
                }
            }
        }
 
        public void Dispose()
        {
            this.Stop();
            udp = null;
        }
 
        public void Start()
        {
            if (!Run)
            {
                udp.BeginReceive(back, udp);
                Run = true;
            }
        }
 
        public void Stop()
        {
            if (Run)
            {
                Run = false;
                udp.Close();
            }
        }
        public void SendMeesage(byte[] datas ,IPEndPoint iPEnd)
        {
            udp.Send(datas, datas.Length, iPEnd);
        }
        public void SendPackMesasage(string message, IPEndPoint iPEndPoint)
        {
            PackMessage(new ChatMessagePackage(DateTime.Now, message), iPEndPoint);
        }
        private void PackMessage(MessagePackageBase A_0, IPEndPoint point)
        {
            byte[] packageData = A_0.GetPackageData();
            udp.Send(packageData, packageData.Length, point);
        }
 
    }

10 、客户端：

 public class ChatClient : IDisposable
    {
        private UdpClient udp;
        public  IPEndPoint ServerAddress;
        private AsyncCallback back;
        static ChatClient()
        {
 
           
        }
 
        public ChatClient()
        {
            ServerAddress = new IPEndPoint(ChatServer.BroadcastAddress, ChatServer.Port);
            udp = new UdpClient();
           
        }
      
     
        private void PackMessage(MessagePackageBase A_0)
        {
            byte[] packageData = A_0.GetPackageData();
            udp.Send(packageData, packageData.Length, ServerAddress);
        }
 
        public void Dispose()
        {
            udp.Close();
            udp = null;
        }
 
        public void Offline()
        {
            PackMessage(new OfflineMessagePackage());
        }
 
        public void Online()
        {
            PackMessage(new OnlineMessagePackage());
        }
 
        public void Query()
        {
            PackMessage(new QueryMessagePackage());
        }
 
        public void SendIdentity()
        {
            PackMessage(new IdentityMessagePackage());
        }
 
        public void SendPackMessage(string message)
        {
            PackMessage(new ChatMessagePackage(DateTime.Now, message));
        }
        public void SendMessage(byte[] datas)
        {
            udp.Send(datas, datas.Length, ServerAddress);
        }
    }

11、调用

   private ChatServer ChatServer;
 
 
   void StartInit()
{
    ChatServer = new ChatServer(ContentConfig.Load().NetWorkControl.Port);
                        ChatServer.DataReceive += new EventHandler(Chatserver_DataReceive);
                        ChatServer.Start();
}
  //JIESHOU
  private void Chatserver_DataReceive(object sender, ChatServerDataReceiveEventArgs e)
        {
           
            if (e.Data != null)
            {
                byte[] data = e.Data;
                //TODO......
 
               
            }
        }