Socket内网实现通信(局域网聊天)

【调试步骤】打开两个Chatting.exe客户端，两个都输入本地的ip地址，第一个选择等待对方链接，第二个选择主动链接，就可以通信了


using System;using System.Drawing;using System.Windows.Forms;using System.Net.Sockets;namespace Chatting{ public partial class MainForm : Form { public MainForm() { InitializeComponent(); } SocketFunc socket; System.Action<string> ReceiveAction; System.Action AccessAction; private void MainForm_Load(object sender, EventArgs e) { //异步建立连接回调 AccessAction = () => { this.Invoke((MethodInvoker)delegate() { lblFriendIP.Visible = false; txtIP.Visible = false; btnConnect.Visible = false; btnWaitAccess.Visible = false; String friendIP = socket.communicateSocket.RemoteEndPoint.ToString(); lblState.Text = String.Format("连接成功. 对方IP:{0}", friendIP); try { socket.Receive(ReceiveAction); } catch (Exception exp) { MessageBox.Show(exp.Message, "错误"); } }); }; //异步接收消息回调 ReceiveAction = msg => { txtGetMsg.Invoke((MethodInvoker)delegate() { UpdateGetMsgTextBox(false, msg, Color.Red); }); }; } private void btnWaitAccess_Click(object sender, EventArgs e) { this.socket = new ServerSocket(); try { this.socket.Access("", this.AccessAction); } catch (Exception ecp) { MessageBox.Show(ecp.Message, "错误"); } lblState.Text = "等待对方连接..."; } private void btnConnect_Click(object sender, EventArgs e) { this.socket = new ClientSocket(); try { this.socket.Access(txtIP.Text, this.AccessAction); } catch (Exception ecp) { MessageBox.Show(ecp.Message, "错误"); } lblState.Text = "正在连接对方..."; } private void btnSendMsg_Click(object sender, EventArgs e) { string message = txtSendMsg.Text.Trim(); if (string.IsNullOrEmpty(message)) { MessageBox.Show("消息内容不能为空!", "错误"); txtSendMsg.Focus(); return; } try { socket.Send(message); } catch(Exception ecp) { MessageBox.Show(ecp.Message, "错误"); return; } UpdateGetMsgTextBox(true, message, Color.Blue); txtSendMsg.Text = ""; } private void UpdateGetMsgTextBox(bool sendMsg, string message, Color color) { string appendText; if (sendMsg == true) { appendText = "Me: " System.DateTime.Now.ToString() Environment.NewLine message Environment.NewLine; } else { appendText = "Friend: " System.DateTime.Now.ToString() Environment.NewLine message Environment.NewLine; } int txtGetMsgLength = txtGetMsg.Text.Length; txtGetMsg.AppendText(appendText); txtGetMsg.Select(txtGetMsgLength, appendText.Length - Environment.NewLine.Length*2 -message.Length); txtGetMsg.SelectionColor = color; txtGetMsg.ScrollToCaret(); } }}