C# serialport写入时需要显示新表单

C# serialport写入时需要显示新表单,c#,serial-port,C#,Serial Port,当IDTECH写卡器正在等待刷卡时,尝试显示一个写有“请刷卡”的新表单 private void writecard(string track1) //string track2) { SerialPort sp1 = new SerialPort(encoderport, 9600, Parity.None, 8, StopBits.One); sp1.ReadTimeout = 10000; if (sp1.IsOpen == tr

当IDTECH写卡器正在等待刷卡时,尝试显示一个写有“请刷卡”的新表单

private void writecard(string track1) //string track2)
    {

        SerialPort sp1 = new SerialPort(encoderport, 9600, Parity.None, 8, StopBits.One);
        sp1.ReadTimeout = 10000;

        if (sp1.IsOpen == true)
        {
            sp1.Close();
        }


        sp1.Open();
        sp1.Write(new byte[] { 0x1B, 0x77 }, 0, 2);
        Thread.Sleep(100);
        sp1.Write(new byte[] { 0x1B, 0x73 }, 0, 2);
        Thread.Sleep(100);
        sp1.Write(new byte[] { 0x1B, 0x01 }, 0, 2);
        Thread.Sleep(100);
        sp1.Write(track1);                              // Track 1
        Thread.Sleep(100);


        sp1.Write(new byte[] { 0x3f, 0x1c }, 0, 2);
        swipeform swipepop = new swipeform();
        swipepop.ShowDialog();                        // **Problem**



        Thread.Sleep(100);

        try
        {
            swipepop.Close();                         // **Problem**
            int firstChar = sp1.ReadChar();
            Thread.Sleep(500);
            string data = String.Concat(Convert.ToChar(firstChar), sp1.ReadExisting());
            //textBox3.Text = String.Format(data);
            if (data != "")
            {
                char result = data[1];
                if (result == '0')
                    MessageBox.Show("Encoding Successful");

                else
                    MessageBox.Show("Encoding Failed - Please try again");
            }
        }
        catch (System.TimeoutException)
        {
            MessageBox.Show("Timed out.  Please try again.");
            sp1.Write(new byte[2] { 0x1b, 0x61 }, 0, 2);
        }
        sp1.Close();
    }
我遇到的问题是,一旦调用writecard方法,swipeform就会弹出,设备希望您进行刷卡。但是,一旦您刷卡,表单将保持并不会关闭,并且在您关闭刷卡表单之前,该方法不会继续。

form.ShowDialog()
正在阻塞。这意味着它在表单关闭之前不会返回


解决方案之一是:检查
swipepop
表单中的串行端口。您可以通过表单的构造函数传递
SerialPort
对象。

我尝试使用do while循环,该循环可以正常工作,但是对话框永远不会关闭,除非我点击X。我认为当X=1时它会保持打开状态