如何在文本框中查看串行端口的读写数据 [英] How can I see reading and writing data for the serial port inside textbox

问题描述

Hellow

在我的窗口中形成两台计算机之间的串口程序，我想看两台计算机发送和接收的数据。我已经使用textBox1发送数据和textBox2进行读取，不幸的是读取方法无法接受文本框。

我该怎么做

谢谢



我尝试过的事情：

Hellow
in my window form Serialport program between 2 computer,i want to watch the data sent and received in both computer. i have used textBox1 for send data and textBox2 for the readding , unfortunatley the reading method can not accept textbox .
how can i do that
thanks

What I have tried:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

using System.Threading;
using System.Threading.Tasks;
using System.IO.Ports;

//https://msdn.microsoft.com/en-us/library/system.io.ports.serialport.readline(v=vs.110).aspx

namespace SerialWinForm
{
    public partial class Form1 : Form
    {
        static SerialPort _serialPort;
        static bool _continue;
        static string globalRead="";
        public Form1()
        {
            InitializeComponent();
        }
        //------------------------------------------------------------------------------------
        private void FormLoad(object sender, EventArgs e)
        {
            //string name;
            //string message;
            //StringComparer stringComparer = StringComparer.OrdinalIgnoreCase;
            //Thread readThread = new Thread(Read);
            //// Create a new SerialPort object with default settings.
            _serialPort = new SerialPort();
            // Allow the user to set the appropriate properties.
            _serialPort.PortName = "com1";//SetPortName(_serialPort.PortName);
            _serialPort.BaudRate = 2400;//SetPortBaudRate(_serialPort.BaudRate);
            _serialPort.Parity = Parity.None;//SetPortParity(_serialPort.Parity);
            _serialPort.DataBits = 8;//SetPortDataBits(_serialPort.DataBits);
            _serialPort.StopBits = StopBits.One;//SetPortStopBits(_serialPort.StopBits);
            _serialPort.Handshake = Handshake.None;//SetPortHandshake(_serialPort.Handshake);
            _serialPort.ReadTimeout = 500;
            _serialPort.WriteTimeout = 500;
            _serialPort.Open();
        }////FormLoad
        //----------------------------------
        private void SerialThreadStartClick(object sender, EventArgs e)
        {
            string name;
            string message;
            StringComparer stringComparer = StringComparer.OrdinalIgnoreCase;
            Thread readThread = new Thread(Read);
            _continue = true;
            readThread.Start();
            //Console.Write("Name: ");      //name = Console.ReadLine();
            name = textBox0.Text;
            //Console.WriteLine("Type QUIT to exit");
            while (_continue)
            {
                message = textBox1.Text;
                textBox2.Text = globalRead;
                if (stringComparer.Equals("quit", message))
                {
                    _continue = false;
                }
                else
                {
                //    _serialPort.WriteLine(String.Format("<{0}>: {1}", name, message));
                       textBox1.Text = message;
                      _serialPort.WriteLine(message);
                }
            }//while
            readThread.Join();
            _serialPort.Close();
        }
        //-----------------------------------------------------------------------------------
        public static void Read()
        {
            while (_continue)
            {
                try
                {
                    //string message = _serialPort.ReadLine();// string
                    string message = _serialPort.ReadByte().ToString();
                    textBox2.Text = message;//   <-------- Error
                    globalRead = message;
                }//try
                catch (TimeoutException) { }
            }//while
        }//Read
        //----------------------------------
    }

}

推荐答案

除了线程之外你不能访问任何控件是在UI线程上创建的。如果你尝试，你将得到一个跨线程异常。

要访问该控件，你需要调用它： MSDN：Control.Invoke [ ^ ]

You can't access any control except from the thread it was created on - the UI thread. If you try, you will get a Cross Thread Exception.
To access the control, you need to Invoke it: MSDN: Control.Invoke[^]

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