通过Arduino

Question

所以我做了一个项目，其中一个系统通过Arduino和Xbee传输数据，接收系统通过Arduino和Xbee接收数据。在接收端，我将信息发送到Visual Studios。因此，当我按停止按钮停止接收数据时，我得到IOException未处理。我该如何解决这个问题？

错误将指向我在

下面添加评论的行

接收端的我的C＃代码：

public Form1()
    {
        InitializeComponent();
    }

    private void start_btn_Click(object sender, EventArgs e)
    {
        myport = new SerialPort();
        myport.BaudRate = 9600;
        myport.PortName = port_name_tb.Text;
        myport.Parity = Parity.None;
        myport.DataBits = 8;
        myport.StopBits = StopBits.One;
        myport.DataReceived+=SerialDataReceivedEventHandler
        (myport_DataReceived);


        try
      {
        myport.Open();
        data_tb.Text = "";
      }
        catch (Exception ex)
      {
          MessageBox.Show(ex.Message, "Error");
      }
    }

    void myport_DataReceived(object sender, SerialDataReceivedEventArgs e)
    {
        this.Invoke(new EventHandler(displaydata_event));
        in_data = myport.ReadLine();  //------> ERROR POINTED TO THIS LINE
    }

    private void displaydata_event(object sender, EventArgs e)
    {
        datetime = DateTime.Now;
        string date = datetime.Day + "/" + datetime.Month;
        string time = datetime.Hour + ":" + datetime.Minute + ":" 
         +      datetime.Second;
        data_tb.AppendText(date +" " +  time + "\t\t" + in_data + "\n");
    }

    private void stop_btn_Click(object sender, EventArgs e)
    {
        try
        {
            myport.Close();
        }

        catch (Exception ex2)
        {
            MessageBox.Show(ex2.Message, "Error");
        }

    }

    private void save_btn_Click(object sender, EventArgs e)
    {
        datetime = DateTime.Now;
        string date = datetime.Day + "/" + datetime.Month;
        string time = datetime.Hour + ":" + datetime.Minute + ":" 
         + datetime.Second;

        try
        {
            string pathfile = @"C:\Users\User\Desktop\Cdata\";
            string filename = "prototype.txt";
            System.IO.File.WriteAllText(pathfile + filename, data_tb.Text);
            MessageBox.Show("Data has been saved to " + pathfile);
        }
        catch (Exception ex3)
        {
            MessageBox.Show(ex3.Message, "Error");
        }
        }
      }

Answer 1

您没有正确捕获交换机中的异常，因此未处理的IOException。

您可以通过将捕获量从Exception更改为IOException exX＆amp;来解决此问题。然后用那个做点什么。