C#Socket 網路通訊非同步處理

C#Socket 網路通訊非同步處理 SocketAsyncEventArgs 非同步通訊端操作

1.服務端簡單實現：

Code:

    public partial class Form_Server : Form    {        private Socket socket;        public Form_Server()        {            InitializeComponent();        }        private void Form_Server_Load(object sender, EventArgs e)        {            try            {                //擷取本地ip地址                IPAddress ipaddress = Dns.GetHostByName(Dns.GetHostName()).AddressList[0];                txt_ip.Text = ipaddress.ToString();            }            catch (Exception ex)            {                MessageBox.Show(ex.Message);            }        }        //開啟Socket監聽        private void btn_listent_open_Click(object sender, EventArgs e)        {            try            {                if (string.IsNullOrEmpty(txt_ip.Text))                {                    MessageBox.Show("請輸入IP地址");                }                //開啟監聽                IPAddress ip = IPAddress.Parse(txt_ip.Text);                IPEndPoint localEP = new IPEndPoint(ip, Int32.Parse(txt_port.Text));                socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);                socket.Bind(localEP);                socket.Listen(1000);                //AcceptAsync非同步方式                SocketAsyncEventArgs socketAsyncEventArgs = new SocketAsyncEventArgs();                socketAsyncEventArgs.Completed += new EventHandler<SocketAsyncEventArgs>(socketAsyncEventArgs_Completed_AcceptAsync);                socketAsyncEventArgs.RemoteEndPoint = localEP;                socketAsyncEventArgs.UserToken = socket;                socket.AcceptAsync(socketAsyncEventArgs);                               //訊息提示                this.lb_msg.Items.Add("[服務端]:");                this.lb_msg.Items.Add("         監聽成功");            }            catch (Exception ex)            {                MessageBox.Show(ex.Message);            }        }        //開始一個非同步作業來接受一個傳入的串連嘗試        void socketAsyncEventArgs_Completed_AcceptAsync(object ServerSocket, SocketAsyncEventArgs e)        {            //已關閉，重疊的操作被中止            if (e.SocketError == SocketError.OperationAborted)            {                //已關閉，重疊的操作被中止                this.lb_msg.Invoke(new Action(() =>                {                    this.lb_msg.Items.Add("[服戶端]:");                    this.lb_msg.Items.Add("         socketAsyncEventArgs_Completed_AcceptAsync：已關閉，重疊的操作被中止>SocketError：OperationAborted");                }));                return;            }            //此串連由遠程對等電腦重設            if (e.SocketError == SocketError.ConnectionReset && e.BytesTransferred == 0)            {                //此串連由遠程對等電腦重設                this.lb_msg.Invoke(new Action(() =>                {                    this.lb_msg.Items.Add("[服戶端]:");                    this.lb_msg.Items.Add("         socketAsyncEventArgs_Completed_AcceptAsync：此串連由遠程對等電腦重設>SocketError：ConnectionReset");                }));                return;            }                        if (e.LastOperation == SocketAsyncOperation.Accept)            {                try                {                    Socket acceptSocket = e.AcceptSocket;                                         //開始一個非同步請求以便從串連的 System.Net.Sockets.Socket 對象中接收資料                    SocketAsyncEventArgs socketAsyncEventArgsReceiveAsync = new SocketAsyncEventArgs();                    socketAsyncEventArgsReceiveAsync.UserToken = acceptSocket;                    byte[] receiveBuff = new byte[1024 * 4];                    socketAsyncEventArgsReceiveAsync.SetBuffer(receiveBuff, 0, receiveBuff.Length);                    socketAsyncEventArgsReceiveAsync.Completed += new EventHandler<SocketAsyncEventArgs>(socketAsyncEventArgs_Completed_ReceiveAsync);                    acceptSocket.ReceiveAsync(socketAsyncEventArgsReceiveAsync);                    //訊息提示                    this.lb_msg.Invoke(new Action(() =>                    {                        this.lb_msg.Items.Add("[用戶端]:");                        this.lb_msg.Items.Add("         串連成功");                    }));                }                catch (Exception ex)                {                    MessageBox.Show(ex.Message);                }                //開始一個非同步作業來接受一個傳入的串連嘗試，遞迴                e.AcceptSocket = null;                socket.AcceptAsync(e);            }        }        //開始一個非同步請求以便從串連的 System.Net.Sockets.Socket 對象中接收資料        void socketAsyncEventArgs_Completed_ReceiveAsync(object acceptSocket, SocketAsyncEventArgs e)        {            //已關閉，重疊的操作被中止            if (e.SocketError == SocketError.OperationAborted)            {                //已關閉，重疊的操作被中止                 this.lb_msg.Invoke(new Action(() =>                {                    this.lb_msg.Items.Add("[服戶端]:");                    this.lb_msg.Items.Add("         socketAsyncEventArgs_Completed_ReceiveAsync：已關閉，重疊的操作被中止>SocketError：OperationAborted");                }));                return;            }            //此串連由遠程對等電腦重設            if (e.SocketError == SocketError.ConnectionReset && e.BytesTransferred == 0)            {                //此串連由遠程對等電腦重設                this.lb_msg.Invoke(new Action(() => {                    this.lb_msg.Items.Add("[服戶端]:");                    this.lb_msg.Items.Add("         socketAsyncEventArgs_Completed_ReceiveAsync：此串連由遠程對等電腦重設>SocketError：ConnectionReset");                }));                return;            }                        if (e.SocketError == SocketError.Success && e.Buffer.Length > 0)            {                try                {                    Socket socket = acceptSocket as Socket;                    string ipAddress = socket.RemoteEndPoint.ToString();                    int lengthuffer = e.BytesTransferred;                    byte[] receiveBuffer = e.Buffer;                    byte[] buffer = new byte[lengthuffer];                    Buffer.BlockCopy(receiveBuffer, 0, buffer, 0, lengthuffer);                    string message = Encoding.UTF8.GetString(buffer);                    this.lb_msg.Invoke(new Action(() =>                    {                        this.lb_msg.Items.Add("[用戶端]:");                        this.lb_msg.Items.Add("         " + message);                    }));                    socket.Send(Encoding.UTF8.GetBytes(string.Format("收到訊息{0}：{1}", DateTime.Now.ToString("yyyy/MM/dd HH:mm:ss"), message)));                    socket.ReceiveAsync(e);                }                catch (Exception ex)                {                    MessageBox.Show(ex.Message);                }            }        }        //關閉Socket監聽        private void btn_listent_Close_Click(object sender, EventArgs e)        {            try            {                if (socket != null)                {                    socket.Close();                }                this.lb_msg.Items.Add("[服務端]:");                this.lb_msg.Items.Add("         關閉監聽成功");            }            catch (Exception ex)            {                MessageBox.Show(ex.Message);            }                   }    }

2.用戶端簡單實現：

Code:

    public partial class ClientMainForm : Form    {        private Socket _socket;        public ClientMainForm()        {            InitializeComponent();        }        //登入        private void btn_login_Click(object sender, EventArgs e)        {            try            {                IPAddress ip = IPAddress.Parse(this.txt_ip.Text);                IPEndPoint ipendPoint = new IPEndPoint(ip, Int32.Parse(this.txt_port.Text));                _socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);                _socket.Connect(ipendPoint);                this.lb_msg.Items.Add("[用戶端]:");                this.lb_msg.Items.Add("         串連服務端成功");                //開啟新的接受訊息非同步作業事件                SocketAsyncEventArgs socketAsyncEventArgs = new SocketAsyncEventArgs();                //設定訊息的緩衝區大小                byte[] receiveBuff = new byte[1024 * 4];                socketAsyncEventArgs.SetBuffer(receiveBuff, 0, receiveBuff.Length);                socketAsyncEventArgs.UserToken = _socket;                //綁定回調事件                socketAsyncEventArgs.Completed += socketAsyncEventArgs_Completed_ReceiveAsync;                _socket.ReceiveAsync(socketAsyncEventArgs);            }            catch (Exception ex)            {                MessageBox.Show(ex.Message);            }        }        //開始一個非同步請求以便從串連的 System.Net.Sockets.Socket 對象中接收資料。        void socketAsyncEventArgs_Completed_ReceiveAsync(object sender, SocketAsyncEventArgs e)        {            //已關閉，重疊的操作被中止            if (e.SocketError == SocketError.OperationAborted)            {                this.lb_msg.Invoke(new Action(() =>                {                    this.lb_msg.Items.Add("[用戶端]:");                    this.lb_msg.Items.Add("         socketAsyncEventArgs_Completed_ReceiveAsync：已關閉，重疊的操作被中止：OperationAborted");                }));                return;            }            //此串連由遠程對等電腦重設            if (e.SocketError == SocketError.ConnectionReset && e.BytesTransferred == 0)            {                //此串連由遠程對等電腦重設                this.lb_msg.Invoke(new Action(() =>                {                    this.lb_msg.Items.Add("[用戶端]:");                    this.lb_msg.Items.Add("         socketAsyncEventArgs_Completed_ReceiveAsync：此串連由遠程對等電腦重設：ConnectionReset");                }));                return;             }            Socket socket = sender as Socket;            if(e.SocketError==SocketError.Success&&e.Buffer.Length>0)            {                string ipAddress = socket.RemoteEndPoint.ToString();                int lengthuffer = e.BytesTransferred;                byte[] receiveBuffer = e.Buffer;                byte[] buffer = new byte[lengthuffer];                Buffer.BlockCopy(receiveBuffer, 0, buffer, 0, lengthuffer);                string message = Encoding.UTF8.GetString(buffer);                this.lb_msg.Invoke(new Action(() =>                {                    this.lb_msg.Items.Add("[服務戶端]:");                    this.lb_msg.Items.Add("         " + message);                }));                              socket.ReceiveAsync(e);            }        }        //發送訊息        private void btn_sendmsg_Click(object sender, EventArgs e)        {            if (string.IsNullOrEmpty(txt_msg.Text))            {                MessageBox.Show("請輸入訊息");            }            else            {                _socket.Send(System.Text.Encoding.UTF8.GetBytes(txt_msg.Text));            }        }    }