C# TCPClient開發手記

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樣本
使用方法
參考

樣本

以下一個簡單的非同步事件TCP用戶端實現

using Newtonsoft.Json;using Newtonsoft.Json.Linq;using System;using System.Collections.Generic;using System.ComponentModel;using System.Linq;using System.Net.Sockets;using System.Text;using System.Text.RegularExpressions;using System.Threading;namespace Leestar54{    /// <summary>    /// 自訂回調事件參數    /// </summary>    /// <typeparam name="T">泛型類返回</typeparam>    public class TEventArgs<T> : EventArgs    {        public T Result { get; private set; }        public TEventArgs(T obj)        {            this.Result = obj;        }    }    class MyTcpClient    {        private string md5id;        Thread readThread;        Thread heartbeatThread;        TcpClient tcpClient;        NetworkStream ns;        //AsyncOperation會在建立他的上下文執行回調        public AsyncOperation AsyncOperation;        private static MyTcpClient singleton = null;        static readonly object lazylock = new object();        #region Event        //回調代理中處理事件        public event EventHandler Connected;        public event EventHandler<TEventArgs<JObject>> Receive;        public event EventHandler<TEventArgs<Exception>> Error;        //AsyncOperation回調代理        private SendOrPostCallback OnConnectedDelegate;        private SendOrPostCallback OnReceiveDelegate;        private SendOrPostCallback OnErrorDelegate;        private void OnConnected(object obj)        {            Connected?.Invoke(this, EventArgs.Empty);        }        private void OnReceive(object obj)        {            Receive?.Invoke(this, new TEventArgs<JObject>((JObject)obj));        }        private void OnError(object obj)        {            Error?.Invoke(this, new TEventArgs<Exception>((Exception)obj));        }        #endregion        /// <summary>        /// 建構函式        /// </summary>        MyTcpClient()        {            OnConnectedDelegate = new SendOrPostCallback(OnConnected);            OnReceiveDelegate = new SendOrPostCallback(OnReceive);            OnErrorDelegate = new SendOrPostCallback(OnError);        }        /// <summary>        /// 單例模式        /// </summary>        /// <returns></returns>        public static MyTcpClient getInstance()        {            if (singleton == null)            {                lock (lazylock)                {                    if (singleton == null)                    {                        singleton = new MyTcpClient();                    }                }            }            return singleton;        }        //當前用戶端唯一id        public string Md5id        {            get            {                return md5id;            }            set            {                md5id = value;            }        }        /// <summary>        /// 串連伺服器        /// </summary>        public void Connect()        {            try            {                tcpClient = new TcpClient("119.23.154.150", 9501);                if (tcpClient.Connected)                {                    ns = tcpClient.GetStream();                    //開啟兩個線程長串連，一個讀取，一個心跳                    readThread = new Thread(Read);                    readThread.IsBackground = true;                    readThread.Start();                    heartbeatThread = new Thread(HeartBeat);                    heartbeatThread.IsBackground = true;                    heartbeatThread.Start();                    System.Diagnostics.Debug.WriteLine("伺服器串連成功");                    this.SendMsg(JObject.FromObject(new                    {                        cmd = "connect"                    }));                }            }            catch (Exception e)            {                this.AsyncOperation.Post(OnErrorDelegate, e);                Thread.Sleep(5000);                ReConnect();            }        }        /// <summary>        /// 讀取接收到的資料        /// </summary>        private void Read()        {            try            {                //休眠2秒讓視窗初始化                Thread.Sleep(2000);                Byte[] readBuffer = new Byte[1024];                while (true)                {                    int alen = tcpClient.Available;                    if (alen > 0)                    {                        Int32 bytes = ns.Read(readBuffer, 0, alen);                        string responseData = System.Text.Encoding.UTF8.GetString(readBuffer, 0, bytes);                        //為了避免粘包現象，以\r\n作為分割符                        string[] arr = responseData.Split("\r\n".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);                        foreach (var item in arr)                        {                            if (item != string.Empty)                            {                                System.Diagnostics.Debug.WriteLine("接受到訊息" + item);                                JObject jobj = JObject.Parse(item);                                this.AsyncOperation.Post(OnReceiveDelegate, jobj);                            }                        }                    }                    Thread.Sleep(500);                }            }            catch (Exception e)            {                this.AsyncOperation.Post(OnErrorDelegate, e);            }        }        /// <summary>        /// 心跳線程        /// </summary>        private void HeartBeat()        {            try            {                while (true)                {                    Thread.Sleep(8000);                    byte[] wb = System.Text.Encoding.UTF8.GetBytes("+h");                    ns.Write(wb, 0, wb.Length);                }            }            catch (Exception e)            {                this.AsyncOperation.Post(OnErrorDelegate, e);                Thread.Sleep(5000);                ReConnect();            }        }        /// <summary>        /// 心跳失敗，則網路異常，重新串連        /// </summary>        public void ReConnect()        {            if (readThread != null)            {                readThread.Abort();            }            Connect();        }        public void SendMsg(string msg)        {            byte[] wb = System.Text.Encoding.UTF8.GetBytes(msg);            ns.Write(wb, 0, wb.Length);        }        public void SendMsg(JObject json)        {            SendMsg(json.ToString(Formatting.None));        }    }}

使用方法

MyTcpClient client = MyTcpClient.getInstance();//保證回呼函數是在建立他的上下文執行（一般是UI線程）client.AsyncOperation = AsyncOperationManager.CreateOperation(null);client.Error += Client_Error; ;client.Receive += Client_Receive; ;client.Connected += Client_Connected;client.Connect();

參考

http://www.cnblogs.com/kex1n/p/6502002.html
https://www.codeproject.com/Articles/14265/The-NET-Framework-s-New-SynchronizationContext-Cla
http://www.cnblogs.com/leestar54/p/4591792.html
https://msdn.microsoft.com/zh-cn/library/vs/alm/system.componentmodel.asyncoperationmanager.createoperation(v=vs.85)

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C# TCPClient開發手記