代码篇C#网络编程之局域网聊天

深藏阁楼爱情的钟 2022-08-05 10:24 204阅读 0赞

using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using System.Windows.Forms;
    using System.Net;
    using System.Net.Sockets;
    using System.Threading;
    
    namespace _008_局域网聊天室
    {
        public partial class Form1 : Form
        {
            //--tcplistener
            private TcpListener myTcpListener;
            //--创建接收客户端连接线程
            private Thread AcceptClientThread;
            //--
            private Dictionary<string, Socket> ClientSocketDic;
            //--
            private TcpClient tcpClient;
    
            //--
            private delegate void ReceiveClientCallBack(string endPoint);
            private ReceiveClientCallBack receiveClientCallBack;
            //-删除客户端回调
            private delegate void DeleteClientCallBack(int index);
            private DeleteClientCallBack deleteClientCallBack;
            //---添加消息回调
            private delegate void ShowMessageCallBack(string text);
            private ShowMessageCallBack showMessageCallBack;
    
            public Form1()
            {
                InitializeComponent();
            }
    
            //---启动服务器按钮被单击事件
            private void btn_start_Click(object sender, EventArgs e)
            {
                try
                {
                    ///---创建IP终端节点
                    IPEndPoint ipEndPoint = new IPEndPoint(IPAddress.Parse(textbox_serverIP.Text), Convert.ToInt32(textbox_serverPort.Text));
                    //--创建实例化TCP连接监听器
                    myTcpListener = new TcpListener(ipEndPoint);
                    //---启动监听
                    myTcpListener.Start();
                    //--实例化接收客户端连接请求
                    AcceptClientThread = new Thread(AcceptClient);
                    AcceptClientThread.IsBackground = true;
                    AcceptClientThread.Start();
                }
                catch(Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
            }
    
            //---接收客户端连接请求
            private void AcceptClient()
            {
                try
                {
                    while (true)
                    {
                        tcpClient = myTcpListener.AcceptTcpClient();
                        Thread ReceiveThread = new Thread(ClientService);
                        ReceiveThread.IsBackground = true;
                        ReceiveThread.Start();
                        //---更新客户端列表
                        listbox_client.Invoke(receiveClientCallBack, tcpClient.Client.RemoteEndPoint.ToString());
                        //---将客户端加入字典
                        ClientSocketDic.Add(tcpClient.Client.RemoteEndPoint.ToString(), tcpClient.Client);
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
            }
    
            //---客户端服务线程
            private void ClientService()
            {
                //--
                TcpClient client = tcpClient;
                //--
                string endPoint = tcpClient.Client.RemoteEndPoint.ToString();
                NetworkStream ns = tcpClient.GetStream();
                while(true)
                {
                    try
                    {
                        int readLen = client.Available;
                        if (0  < readLen)
                        {
                            byte[] getData = new byte[1024];
                            ns.Read(getData, 0, getData.Length);
                            string getMsg = Encoding.Default.GetString(getData);
                            if (0 == getMsg.Replace("\0", "").Length)
                            {
                                //--掉线
                                for (int i = 0; i < listbox_client.Items.Count; i++)
                                {
                                    if (string.Equals(endPoint, listbox_client.Items[i].ToString()))
                                    {
                                        listbox_client.Invoke(deleteClientCallBack, i);
                                    }
                                }
                                //---将掉线客户端从字典删除
                                ClientSocketDic.Remove(endPoint);
                                break;
                            }
    
                            //--将消息添加至消息列表
                            listbox_message.Invoke(showMessageCallBack, getMsg.Replace("\0",""));
                            //--消息转发
                            for (int i = 0; i < listbox_client.Items.Count; i++)
                            {
                                if (!string.Equals(endPoint, listbox_client.Items[i].ToString()))
                                {
                                    ClientSocketDic[listbox_client.Items[i].ToString()].Send(Encoding.Default.GetBytes(endPoint + ":" + getMsg.Replace("\0", "")));
                                }
                            }
                         }
                    }
                    catch(Exception ex)
                    {
                        MessageBox.Show(ex.Message);
                        if (null != ns)
                        {
                            ns.Dispose();
                        }
                    }
                }
            }
    
            private void Form1_Load(object sender, EventArgs e)
            {
                //---初始化回调委托
                receiveClientCallBack = new ReceiveClientCallBack(NewClient);
                deleteClientCallBack = new DeleteClientCallBack(DeleteClient);
                showMessageCallBack = new ShowMessageCallBack(ShowMessage);
                ClientSocketDic = new Dictionary<string,Socket>;
            }
    
            //---添加客户端回调方法
            private void NewClient(string text)
            {
                listbox_client.Items.Add(text);
            }
    
            //---删除客户端回调委托
            private void DeleteClient(int index)
            {
                listbox_client.Items.RemoveAt(index);
    
            }
    
            //---显示消息回调方法
            private void ShowMessage(string text)
            {
                listbox_message.Items.Add(text);
            }
        }
    }