似乎無法在這里找到我一生的答案。無論如何，事件處理程序如何更改 Form 的 textBox.text？private static void DataReceivedHandler(object sender, SerialDataReceivedEventArgs e)        {            SerialPort sp = (SerialPort)sender;            string indata = sp.ReadExisting();            //Do what ever you want with the data            textBox2.Text = "test"; //alas, this doesn't work        }按下按鈕時創建事件處理程序private void button3_Click(object sender, EventArgs e)        {                    serialPort1.PortName = comboBox1.Text;                    serialPort1.BaudRate = Convert.ToInt32(comboBox2.Text);                    serialPort1.RtsEnable = true;                    serialPort1.DtrEnable = true;                    serialPort1.DataReceived += new SerialDataReceivedEventHandler(DataReceivedHandler);                    serialPort1.Open();                }            }任何幫助是極大的贊賞