C# 多线程里设置tabcontrol1.selectab=tabpage2;焦点移到tabpage2，但控件内容没有显示出来

Question

我在做一个聊天系统 多线程中接收数据时 让tabpage2的richtextbox控件显示聊天内容，我是这样写的
richtextbox2.text="聊天内容";
tabControl1.SelectedTab = tabPage2;但是当接收到数据后 tabpage2只是获得了焦点 但控件内容全部显示不出来，这到底是怎么回事啊？

Answer 1

richtextbox2.text="聊天内容";
tabControl1.SelectedTab = tabPage2;换下位置试试
很奇快怪的问题哈

Answer 2

不能换位置了 tabPage1 接受别的内容呢！

Answer 3

线程里一般这样赋值，会报错，在线程里是不能对控件进行赋值的，不安全机制，除非加上CheckForIllegalCrossThreadCalls = false;这句话

Answer 4

还有多线程会出现并发性，建议Lock下吧

Answer 5

我在load里已经加上CheckForIllegalCrossThreadCalls = false这句了！

Answer 6

public Main()
        {
            InitializeComponent();
            StartCSocket();
        }
private void Main_Load(object sender, EventArgs e)
        {
            System.Windows.Forms.Control.CheckForIllegalCrossThreadCalls = false;
        }public void StartCSocket()
        {            myListener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);            IPAddress[] addrIP = Dns.GetHostAddresses("127.0.0.1");
            localAddress = addrIP[0];
            myListener.Bind(new IPEndPoint(localAddress, port));
            myListener.Listen(0);
            //Console.WriteLine("开始监听{0}:{1}", localAddress.ToString(), port.ToString());
            ThreadStart ts = new ThreadStart(ListenClientConnect);
            Thread myThread = new Thread(ts);
            myThread.Start();
        }private void ListenClientConnect()
        {
            while (true)
            {
                Socket newClient;
                try
                {
                    newClient = myListener.Accept();
                }
                catch
                {
                    break;
                }
                ParameterizedThreadStart pts = new ParameterizedThreadStart(ReceiveData);
                Thread threadReceive = new Thread(pts);
                User user = new User(newClient);
                threadReceive.Start(user);
            }
        }private void ReceiveData(object obj)
        {
            Socket client = user.client;
            bool normalExit = false;
            bool exitWhile = true;
            while (exitWhile == true)
            {
                string receiveString = null;
                try
                {
                    receiveString = user.sr.ReadLine();
                }
                catch
                {
                    Console.WriteLine("接收数据失败");
                }
                if (receiveString == null)
                {
                    if (normalExit == false)
                    {
                        if (client.Connected == true)
                        {
                            //Console.WriteLine(string.Format("与{0}失去联系，", client.RemoteEndPoint));
                            //richTextBox2.AppendText(string.Format("与{0}失去联系，", client.RemoteEndPoint));
                        }
                    }
                    break;
                }
                string[] splitString = receiveString.Split(',');
                
                richTextBox2.Text = string.Format("{0} {1} 对 您说:{2}", splitString[2].ToString(), splitString[3], splitString[4])+"\r"+richTextBox2.Text;
                 tabControl1.SelectedTab = tabPage2;//
                }
                client.Close();        }