这篇文章主要介绍了c#实现多线程局域网聊天系统的相关代码，有此方面需求的小伙伴可以参考下。

　　觉得好有点帮助就顶一下啦。

　　socke编程，支持多客户端，多线程操作避免界面卡死。

　　开启socket

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 private void button1_Click(object sender, EventArgs e) { try { int port = int.Parse(txt_port.Text); string host = txt_ip.Text; //创建终结点 IPAddress ip = IPAddress.Parse(host); IPEndPoint ipe = new IPEndPoint(ip, port); //创建Socket并开始监听 newsock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); //创建一个Socket对象，如果用UDP协议，则要用SocketTyype.Dgram类型的套接字 newsock.Bind(ipe); //绑定EndPoint对象 newsock.Listen(0); //开始监听 //为新建立的连接创建新的Socket acceptClientThread = new Thread(new ThreadStart(AcceptClient)); acceptClientThread.Start(); SetText("开始监听"); } catch (Exception exp) { CommonFunction.WriteLog(exp, exp.Message); } }

　　监控端口，接收客户端

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 /// <summary> /// 接受客户端，可接受多个客户端同时连入，并对连入的客户端注册到客户端列表 /// </summary> public void AcceptClient() { try { while (true) { Socket client = newsock.Accept(); ip = client.Handle; RegeistUser(client.Handle, client); Thread clientThread = new Thread(new ParameterizedThreadStart(ReceiveData)); object o = client; clientThread.Start(o); } } catch (Exception exp) { CommonFunction.WriteLog(exp, exp.Message); } }

　　接收客户端数据并广播数据

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 /// <summary> /// 接收客户端数据并，转发到目标客户端。 /// </summary> public void ReceiveData(object o) { try { while (true) { Socket client = (Socket)o; string recvStr = ""; byte[] recvBytes = new byte[1024]; int bytes; bytes = client.Receive(recvBytes, recvBytes.Length, 0); //从客户端接受消息 recvStr = Encoding.UTF8.GetString(recvBytes, 0, bytes); SendMessage(client, recvStr); SetText(recvStr); CommonFunction.WriteErrorLog(recvStr); } } catch (Exception exp) { CommonFunction.WriteLog(exp, exp.Message); } }

　　判断是用户注册还是发送消息

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 /// <summary> /// 判断是用户注册还是发送消息 /// </summary> /// <param name="p_strMessage"></param> public void SendMessage(Socket client,string p_strMessage) { if (p_strMessage.StartsWith("@")) { RegeistUser(p_strMessage, client); } else if (p_strMessage.StartsWith(">")) {   DeleteClident(p_strMessage); } else { //SendMessageToTarget(p_strMessage); SendAllMessage(p_strMessage); } }

　　将socket注册为指定用户名

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1 2 3 4 5 6 7 8 9 10 11 12 /// <summary> /// 将socket注册为指定用户名 /// </summary> /// <param name="user"></param> /// <param name="ss"></param> public void RegeistUser(string user, Socket ss) { user = user.Remove(0, 1); userSocketDict.Add(user, ss); SendOneMessage(ss, "欢迎" + user + "连入！"); RefreshClient(); }

　　从客户端字典中移除客户端

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1 2 3 4 5 6 7 8 9 10 /// <summary> /// 从客户端字典中移除客户端 /// </summary> /// <param name="p_strMessage"></param> public void DeleteClident(string p_strMessage) { p_strMessage = p_strMessage.Remove(0, 1); userSocketDict.Remove(p_strMessage); RefreshClient(); }

　　群发消息

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1 2 3 4 5 6 7 8 9 10 11 12 13 /// <summary> /// 群发消息 /// </summary> /// <param name="p_strsend"></param> public void SendAllMessage(string p_strsend) { //MessageBox.Show(p_strsend); foreach (string item in userSocketDict.Keys) { byte[] bs = Encoding.UTF8.GetBytes(p_strsend); userSocketDict[item].Send(bs, bs.