C#Socket 网络通信异步处理
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C#Socket 网络通信异步处理 SocketAsyncEventArgs 异步套接字操作
1.服务端简单实现：
Code:
public partial class Form_Server : Form { private Socket socket; public Form_Server() { InitializeComponent(); } private void Form_Server_Load(object sender, EventArgs e) { try { //获取本地ip地址 IPAddress ipaddress = Dns.GetHostByName(Dns.GetHostName()).AddressList[0]; txt_ip.Text = ipaddress.ToString(); } catch (Exception ex) { MessageBox.Show(ex.Message); } } //开启Socket监听 private void btn_listent_open_Click(object sender, EventArgs e) { try { if (string.IsNullOrEmpty(txt_ip.Text)) { MessageBox.Show("请输入IP地址"); } //打开监听 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异步方式 SocketAsyncEventArgs socketAsyncEventArgs = new SocketAsyncEventArgs(); socketAsyncEventArgs.Completed += new EventHandler<SocketAsyncEventArgs>(socketAsyncEventArgs_Completed_AcceptAsync); socketAsyncEventArgs.RemoteEndPoint = localEP; socketAsyncEventArgs.UserToken = socket; socket.AcceptAsync(socketAsyncEventArgs); //消息提示 this.lb_msg.Items.Add("[服务端]:"); this.lb_msg.Items.Add(" 监听成功"); } catch (Exception ex) { MessageBox.Show(ex.Message); } } //开始一个异步操作来接受一个传入的连接尝试 void socketAsyncEventArgs_Completed_AcceptAsync(object ServerSocket, SocketAsyncEventArgs e) { //已关闭，重叠的操作被中止 if (e.SocketError == SocketError.OperationAborted) { //已关闭，重叠的操作被中止 this.lb_msg.Invoke(new Action(() => { this.lb_msg.Items.Add("[服户端]:"); this.lb_msg.Items.Add(" socketAsyncEventArgs_Completed_AcceptAsync：已关闭，重叠的操作被中止>SocketError：OperationAborted"); })); return; } //此连接由远程对等计算机重置 if (e.SocketError == SocketError.ConnectionReset && e.BytesTransferred == 0) { //此连接由远程对等计算机重置 this.lb_msg.Invoke(new Action(() => { this.lb_msg.Items.Add("[服户端]:"); this.lb_msg.Items.Add(" socketAsyncEventArgs_Completed_AcceptAsync：此连接由远程对等计算机重置>SocketError：ConnectionReset"); })); return; } if (e.LastOperation == SocketAsyncOperation.Accept) { try { Socket acceptSocket = e.AcceptSocket; //开始一个异步请求以便从连接的 System.Net.Sockets.Socket 对象中接收数据 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); //消息提示 this.lb_msg.Invoke(new Action(() => { this.lb_msg.Items.Add("[客户端]:"); this.lb_msg.Items.Add(" 连接成功"); })); } catch (Exception ex) { MessageBox.Show(ex.Message); } //开始一个异步操作来接受一个传入的连接尝试，递归 e.AcceptSocket = null; socket.AcceptAsync(e); } } //开始一个异步请求以便从连接的 System.Net.Sockets.Socket 对象中接收数据 void socketAsyncEventArgs_Completed_ReceiveAsync(object acceptSocket, SocketAsyncEventArgs e) { //已关闭，重叠的操作被中止 if (e.SocketError == SocketError.OperationAborted) { //已关闭，重叠的操作被中止 this.lb_msg.Invoke(new Action(() => { this.lb_msg.Items.Add("[服户端]:"); this.lb_msg.Items.Add(" socketAsyncEventArgs_Completed_ReceiveAsync：已关闭，重叠的操作被中止>SocketError：OperationAborted"); })); return; } //此连接由远程对等计算机重置 if (e.SocketError == SocketError.ConnectionReset && e.BytesTransferred == 0) { //此连接由远程对等计算机重置 this.lb_msg.Invoke(new Action(() => { this.lb_msg.Items.Add("[服户端]:"); this.lb_msg.Items.Add(" socketAsyncEventArgs_Completed_ReceiveAsync：此连接由远程对等计算机重置>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("[客户端]:"); this.lb_msg.Items.Add(" " + message); })); socket.Send(Encoding.UTF8.GetBytes(string.Format("收到消息{0}：{1}", DateTime.Now.ToString("yyyy/MM/dd HH:mm:ss"), message))); socket.ReceiveAsync(e); } catch (Exception ex) { MessageBox.Show(ex.Message); } } } //关闭Socket监听 private void btn_listent_Close_Click(object sender, EventArgs e) { try { if (socket != null) { socket.Close(); } this.lb_msg.Items.Add("[服务端]:"); this.lb_msg.Items.Add(" 关闭监听成功"); } catch (Exception ex) { MessageBox.Show(ex.Message); } } }2.客户端简单实现：
Code:
public partial class ClientMainForm : Form { private Socket _socket; public ClientMainForm() { InitializeComponent(); } //登录 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("[客户端]:"); this.lb_msg.Items.Add(" 连接服务端成功"); //开启新的接受消息异步操作事件 SocketAsyncEventArgs socketAsyncEventArgs = new SocketAsyncEventArgs(); //设置消息的缓冲区大小 byte[] receiveBuff = new byte[1024 * 4]; socketAsyncEventArgs.SetBuffer(receiveBuff, 0, receiveBuff.Length); socketAsyncEventArgs.UserToken = _socket; //绑定回调事件 socketAsyncEventArgs.Completed += socketAsyncEventArgs_Completed_ReceiveAsync; _socket.ReceiveAsync(socketAsyncEventArgs); } catch (Exception ex) { MessageBox.Show(ex.Message); } } //开始一个异步请求以便从连接的 System.Net.Sockets.Socket 对象中接收数据。 void socketAsyncEventArgs_Completed_ReceiveAsync(object sender, SocketAsyncEventArgs e) { //已关闭，重叠的操作被中止 if (e.SocketError == SocketError.OperationAborted) { this.lb_msg.Invoke(new Action(() => { this.lb_msg.Items.Add("[客户端]:"); this.lb_msg.Items.Add(" socketAsyncEventArgs_Completed_ReceiveAsync：已关闭，重叠的操作被中止：OperationAborted"); })); return; } //此连接由远程对等计算机重置 if (e.SocketError == SocketError.ConnectionReset && e.BytesTransferred == 0) { //此连接由远程对等计算机重置 this.lb_msg.Invoke(new Action(() => { this.lb_msg.Items.Add("[客户端]:"); this.lb_msg.Items.Add(" socketAsyncEventArgs_Completed_ReceiveAsync：此连接由远程对等计算机重置：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("[服务户端]:"); this.lb_msg.Items.Add(" " + message); })); socket.ReceiveAsync(e); } } //发送消息 private void btn_sendmsg_Click(object sender, EventArgs e) { if (string.IsNullOrEmpty(txt_msg.Text)) { MessageBox.Show("请输入消息"); } else { _socket.Send(System.Text.Encoding.UTF8.GetBytes(txt_msg.Text)); } } }阅读全文
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