C#开启线程做socket通讯，再通过委托控制ui线程

        public Form1()
        {
            InitializeComponent();
        }
        Thread T1;

        private void Form1_Load(object sender, EventArgs e)
        {
            button1_Click(sender,e);
        }

        public void button1_Click(object sender, EventArgs e)
        {
            T1 = new Thread(aaa);
            T1.IsBackground = true;
            T1.Start();
        }
        public  void aaa() 
        {
            MessageBox.Show("6");
            Thread.Sleep(1000);
            Socket server_socketListen = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            IPAddress ips = IPAddress.Parse("127.0.0.1");
            IPEndPoint ipNode = new IPEndPoint(ips, 80);//网络端点：为IP地址和端口号
            //服务端必须绑定一个端口才能listen(),要不然客户端就不知道该连哪个端口了
            server_socketListen.Bind(ipNode);
            //监听后，如果客户端这时调用connect()发出连接请求，服务器端就会接收到这个请求
            //listen函数将socket变为被动类型的，等待客户的连接请求。
            server_socketListen.Listen(10);
            //服务端有两个socket；这里Accept()返回的相当于是客户端的socket，用于和客户端发送（send）和接收（recv）数据
            Socket socket_commu = server_socketListen.Accept();
            while (true)
            {
                byte[] buffer = new byte[1024 * 1024];
                //接收数据到缓存buffer
                int num = socket_commu.Receive(buffer);
                string str = Encoding.UTF8.GetString(buffer, 0, num);
                Console.WriteLine("收到客户端数据 : " + str);
                //发送消息到客户端。
                socket_commu.Send(Encoding.UTF8.GetBytes("服务端：" + str));
                //this.Invoke(() => textBox1.AppendText(str)));
               // this.label1.Invoke(new MethodInvoker(() => this.label1.Text =str));
               
                if (str == "1")
                {
                    button1.BackColor = Color.Red;
                    //label1.Text = str;
                    label1.BackColor = Color.Green;
                    
                }
                else
                {
                    button1.BackColor= Color.Green;
                }
                Settext(str);
            }
            
        }

        private void button2_Click(object sender, EventArgs e)
        {
            label1.Text = "1";
        }
        private void Settext(string text)
         {
            this.Invoke((MethodInvoker)(() => { this.label1.Text = text; }));
             
         }
}