你應該知道的.net平臺下socket異步通訊（代碼實例）

1，首先添加兩個windows窗體項目，一個作為服務端server，一個作為客戶端Client

2，然后添加服務端代碼，添加命名空間，界面上添加TextBox控件

using System.Net;using System.Net.Sockets;

3，FormLoad方法添加代碼

PRivate void Form1_Load(object sender, EventArgs e)        {            ipEndPoint epServer = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 7878);//IP地址和端口號            Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//定義socket            socket.Bind(epServer);//綁定            socket.Listen(10);//監聽            socket.BeginAccept(new AsyncCallback(RecVing), socket);//異步接收，回調方法為RecVing        }

4，添加回調方法代碼

private void RecVing(IAsyncResult rec_socket)        {            string cmdstr = "";            Socket sc = (Socket)rec_socket.AsyncState;            Socket socket = sc.EndAccept(rec_socket);            byte[] bytes = new byte[1024];            int i = socket.Receive(bytes);            cmdstr = Encoding.UTF8.GetString(bytes, 0, i);            showstrs(cmdstr);            sc.BeginAccept(new AsyncCallback(RecVing), sc);        }

5，添加showstrs方法，

定義委托private delegate void shixudong_invoke(string invokefun);

private void showstrs(string recv_strs)        {            if (recv_strs.Length != 0)            {                if (this.InvokeRequired)                {                    shixudong_invoke invoke = new shixudong_invoke(showstrs);                    this.Invoke(invoke, (object)recv_strs);                }                else                {                    textBox1.Text = recv_strs;                                    }            }        }

6，到此為止，服務端已經添加完畢

7，客戶端代碼，首先跟服務端一樣，添加命名空間，在界面上添加button事件

private void button1_Click(object sender, EventArgs e)        {            IPEndPoint IPEndPoint = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 7878);//IP，端口號            Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);            socket.BeginConnect(IPEndPoint, new AsyncCallback(Sending), socket);//回調方法Sending        }

8，添加回調方法，代碼如下

private void Sending(IAsyncResult rec_socket)        {            Socket socket = (Socket)rec_socket.AsyncState;            try            {                if (socket.Connected)                {                    byte[] msgBuff = Encoding.UTF8.GetBytes(textBox1.Text);                    socket.Send(msgBuff);                    //socket.Accept();                }                else                {                    Console.WriteLine("Error!", "Error!");                }            }            catch            {                Console.WriteLine("Error!", "Error!");            }        }

9，到此為止，客戶端代碼已經完成，調試的時候先啟動服務端，然后啟動客戶端

10，運行截圖如下，點擊按鈕前，在文本框中輸入shixudong

11，點擊按鈕之后截圖如下

測試成功，有問題的可以聯系我shixudong3@yeah.net,希望能多大家有所幫助！