.net的socket异步通讯示例分享_实用技巧

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1、首先添加两个windows窗体项目,一个作为服务端server,一个作为客户端Client

2、然后添加服务端代码,添加命名空间,界面上添加TextBox控件


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

3、FormLoad方法添加代码


private void Form1_Load(object sender, EventArgs e)
        {
            IPEndPoint epServer = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 7878);//IP地址和端口号
            Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//定义socket
            socket.Bind(epServer);//绑定
            socket.Listen(10);//监听
            socket.BeginAccept(new AsyncCallback(RecVing), socket);//异步接收,回调方法为RecVing
        }

4、添加回调方法代码


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,

定义委托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、到此为止,服务端已经添加完毕

7,客户端代码,首先跟服务端一样,添加命名空间,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,端口号
            Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            socket.BeginConnect(IPEndPoint, new AsyncCallback(Sending), socket);//回调方法Sending
        }

8、添加回调方法,代码如下


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、到此为止,客户端代码已经完成,调试的时候先启动服务端,然后启动客户端

10、运行截图如下,点击按钮前,在文本框中输入shixudong

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