Question

我有一个 SerialPort ComPort = new SerialPort（）;

从Windows窗体初始化为“COM1”，事件处理程序为：

ComPort.DataReceived += new System.IO.Ports.SerialDataReceivedEventHandler(port_DataReceived_1);

private void port_DataReceived_1(object sender, SerialDataReceivedEventArgs e)
{
    InputData = ComPort.ReadExisting();
    if (InputData != String.Empty)
    {
        this.BeginInvoke(new SetTextCallback(SetText), new object[] { InputData });
    }
}

private void SetText(string text)
{
    Response = Encoding.UTF8.GetBytes(text);

}

在表格中

private byte[] Response = null;
private int MaxAttempts = 1
private int Attempts = 0;
private bool Launch = true;

点击按钮控件后，我有：

    private void btnTest_Click(object sender, EventArgs e)
    {
        byte[] BufferTest = new byte[1];
        BufferTest[0] = 1;

        System.Timers.Timer Temp = new System.Timers.Timer(2000);
        Temp.Elapsed += OnTimedEvent; //See this function below
        Temp.Enabled = true;

        while (Response == null && Attempts < MaxAttempts)
        {
            if (Launch)
            {
                Launch = false;
                ComPort.Write(BufferTest, 0, BufferTest.Length);
            }
        }

        //Right here Response is still null despite there was bytes read at serial port
    }

    private void OnTimedEvent(object sender, System.Timers.ElapsedEventArgs e)
    {
        Attempts++;
        Launch = true;
    }

在btnTest_Click方法结束时，尽管在串行端口读取了字节，但仍然为响应，并设置响应。会发生什么是在btnTest_Click完成后调用SetText（）。我期待在事件时调用SetText（），然后中断while循环，从而获得响应。

请帮忙???

根据计时器

0 个答案: