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

namespace _05
{
    public partial class Reader : Form
    {
        public Reader()
        {
            InitializeComponent();
        }

        private void CCOM_SelectedIndexChanged(object sender, EventArgs e)
        {
            serialPort1.Close();
            button1.Text = "打 开";
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (button1.Text == "打 开")
            {
                serialPort1.Open();
                button1.Text = "关 闭";
            }
            else
            {
                serialPort1.Close();
                button1.Text = "打 开";
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            richTextBox1.Clear();
            serialPort1.Close();
            button1.Text = "打 开";
        }

        private void Baud_SelectedIndexChanged(object sender, EventArgs e)
        {
            serialPort1.Close();
            button1.Text = "打 开";
        }

        private void serialPort1_DataReceived(object sender, e)
        {
            string serialReadString = serialPort1.ReadExisting();
             this.richTextBox1.Invoke
                 (
                 new MethodInvoker
                     (

                       delegate
                       {

                           this.richTextBox1.AppendText(serialReadString);
                       }

                     )

                 );
        }

        private void Reader_Load(object sender, EventArgs e)
        {
            chuankou();
            botelv();
            serialPort1.PortName = CCOM.Text;
            serialPort1.BaudRate = int.Parse(CBaud.Text);
            serialPort1.DataBits = 8;
            serialPort1.Parity =
            serialPort1.StopBits =
            serialPort1.ReadBufferSize = 1024;
        }
        private void chuankou()
        {
            CBaud.Items.Clear();
            foreach (string portName in ())
            {
                SerialPort handler = new SerialPort(portName);
                try
                {
                    handler.Open();
                    CCOM.Items.Add(portName);
                    //CCOM.Text = "COM1";
                    //comcom.Items.Add(portName);
                    CCOM.Text = portName;
                }
                catch (Exception)
                {

                }

                finally
                {
                    handler.Close();
                }
            }
        }
        private void botelv()
        {

            CBaud.Items.Add("2400");
            CBaud.Items.Add("4800");
            CBaud.Items.Add("9600");
            CBaud.Items.Add("38400");
            CBaud.Text = "38400";
        }
    }
}
下面是接收并且显示到richbox中的数据，每个数据是11字节，数据格式是：02开头（1字节），读头编号（1字节），数据类型（1字节），数据长度（1字节），通信数据（6字节），校验位（1字节）。


0384EB
，

03D2FA{，

03638Ct，

0278F3q，

01CF83，

03E116y。
但是当接收数据格式为02 32 45 41 44（例）的时候显示的就全是“???????”这是什么原因啊？请各位大大们解惑，还有，如何将接收到的信息（如02 32 45 41 44）原封不动的显示到richbox里啊（就是也显示02 32 45 41 44）

看样子数据是从string serialReadString = serialPort1.ReadExisting();这个方法中取出来的，你需要检查serialPort1.ReadExisting()这个方法返回的数据是否正确

这为大大能不能帮忙看看啊，小弟初学c#，懂的不是很多，还请不吝赐教，谢谢啊。

请教楼主一个问题：为什么我在使用textbox1.invoke的时候会出现    “System.Windows.Controls.TextBox”不包含“invoke”的定义，并且找不到可接受类型为“System.Windows.Controls.TextBox”的第一个参数的扩展方法“invoke”(是否缺少 using 指令或程序集引用?)  

你把你的代码发过来我看下，另外，我也是新手，不一定能帮到你哦，呵呵~