发生了异常“Microsoft.VisualStudio.Debugger.Runtime.CrossThreadMessagingException”?

Question

this.BeginInvoke(new System.Threading.ThreadStart(delegate()
                                    {
                                        lblCount.Text = count.ToString();
                                    }));
调试到这里看到的错误提示：不能进入  lblCount.Text = count.ToString();

Answer 1

线程里不能更新UI，得用委托参考:
How to update the GUI from another thread in C#?
http://stackoverflow.com/questions/661561/how-to-update-the-gui-from-another-thread-in-c

Answer 2

你在Timer里开了个线程，专门用于更新UI?有点奇怪，直接更新不行吗？

Answer 3

已经解决了，原因是定时导致界面卡死。
将定时调用放到线程中就好了，修改代码如下：
private void btnIPCrawl_Click(object sender, EventArgs e)
        {
            Thread thread = new Thread(TimerCrawlIP);
            thread.IsBackground = true;
            thread.Start();
        }        /// <summary>
        /// 定时抓取IP
        /// </summary>
        private void TimerCrawlIP()
        {
            //隔段时间自动调用程序
            System.Threading.Timer threadTimer = new System.Threading.Timer(new System.Threading.TimerCallback(InvokeIPCrawl), null, 0, 14400000);
            while (true)
            {
                Thread.Sleep(14400000);
            }
        }