Winform编程，异步读取数据

Question

base {System.Windows.Forms.TextBoxBase} = {Text = 由于以前的函数求值超时，函数求值被禁用。必须继续执行才能重新启用函数求值。}
例子来源于：
http://hi.baidu.com/%C4%CF%B9%AC%B3%FE%BA%AE/blog/item/c203d8350016de0891ef3922.html

Answer 1

 //异步读取 
        private void AsyReceiveData(object serialPortobj)
        {
            SerialPort serialPort = (SerialPort)serialPortobj;
            System.Threading.Thread.Sleep(500);
            try
            {
                txtReceive.Text = serialPort.ReadExisting();
            }
            catch (Exception e)
            {
                MessageBox.Show(e.Message);
                //处理错误 
            }
            serialPort.Close();
        }