求c#serialport类实现串口通信的源代码

我想用c#的serialport做一个串口通信的类，向串口发一个AT命令，接受到"OK"并显示出来，谁能提供源代码？

我自己做了一个这样的例子，可是在读数据的时候（我是用的同步读）死在那个地方了，怎么也不往下执行了。

下面是我程序的源代码：
using System.IO.Ports

SerialPort sp = new SerialPort("com1");
sp.Open();
sp.Write("at E0\r");
sp.Write("at\r");
char[] buffer = new char[10];
sp.Read(buffer,0,buffer.length);---就到这一句的时候怎么也读不出来了，程序死了。
console.write(buffer);
--------------------编程问答-------------------- 我的邮箱是infobox0532@126.com,infobox0531@163.com,谁有给我发一下吧，谢谢了！！ --------------------编程问答-------------------- 转一段代码给你看看
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO.Ports;
using System.Threading;

namespace TestSerialPort
{
    public partial class frmTESTSerialPort : Form
    {
        public frmTESTSerialPort()
        {
            InitializeComponent();
            Control.CheckForIllegalCrossThreadCalls = false;
        }

        private Button button1;
        private TextBox txtSend;
        private TextBox txtReceive;
        private Label label1;
        private Label label2;

        /// <summary>
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// 清理所有正在使用的资源。
        /// </summary>
        /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows 窗体设计器生成的代码

        /// <summary>
        /// 设计器支持所需的方法 - 不要
        /// 使用代码编辑器修改此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.button1 = new System.Windows.Forms.Button();
            this.txtSend = new System.Windows.Forms.TextBox();
            this.txtReceive = new System.Windows.Forms.TextBox();
            this.label1 = new System.Windows.Forms.Label();
            this.label2 = new System.Windows.Forms.Label();
            this.SuspendLayout();
            //
            // button1
            //
            this.button1.Location = new System.Drawing.Point(440, 379);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(75, 23);
            this.button1.TabIndex = 0;
            this.button1.Text = "发送";
            this.button1.UseVisualStyleBackColor = true;
            this.button1.Click += new System.EventHandler(this.button1_Click);
            //
            // txtSend
            //
            this.txtSend.Location = new System.Drawing.Point(59, 12);
            this.txtSend.Multiline = true;
            this.txtSend.Name = "txtSend";
            this.txtSend.Size = new System.Drawing.Size(456, 164);
            this.txtSend.TabIndex = 2;
            //
            // txtReceive
            //
            this.txtReceive.Location = new System.Drawing.Point(59, 200);
            this.txtReceive.Multiline = true;
            this.txtReceive.Name = "txtReceive";
            this.txtReceive.Size = new System.Drawing.Size(456, 164);
            this.txtReceive.TabIndex = 2;
            //
            // label1
            //
            this.label1.Location = new System.Drawing.Point(13, 15);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(41, 12);
            this.label1.TabIndex = 0;
            this.label1.Text = "发送";
            //
            // label2
            //
            this.label2.Location = new System.Drawing.Point(13, 213);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(41, 12);
            this.label2.TabIndex = 0;
            this.label2.Text = "接收";
            //
            // frmTESTSerialPort
            //
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(546, 434);
            this.Controls.Add(this.label2);
            this.Controls.Add(this.label1);
            this.Controls.Add(this.txtReceive);
            this.Controls.Add(this.txtSend);
            this.Controls.Add(this.button1);
            this.Name = "frmTESTSerialPort";
            this.Text = "串口试验";
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

--------------------编程问答-------------------- private void button1_Click(object sender, EventArgs e)
        {
            //实例化串口对象(默认：COMM1,9600,e,8,1)
            SerialPort serialPort1 = new SerialPort();
            //更改参数
            serialPort1.PortName = "COM1";
            serialPort1.BaudRate = 19200;
            serialPort1.Parity = Parity.Odd;
            serialPort1.StopBits = StopBits.Two;

            //上述步骤可以用在实例化时调用SerialPort类的重载构造函数
            //SerialPort serialPort = new SerialPort("COM1", 19200, Parity.Odd, StopBits.Two);

            //打开串口(打开串口后不能修改端口名,波特率等参数,修改参数要在串口关闭后修改)
            serialPort1.Open();

            //发送数据
            SendStringData(serialPort1);
            //也可用字节的形式发送数据
            //SendBytesData(serialPort1);

            //开启接收数据线程
            ReceiveData(serialPort1);

        }



        //发送字符串数据
        private void SendStringData(SerialPort serialPort)
        {
            serialPort.Write(txtSend.Text);
        }

        /// <summary>
        /// 开启接收数据线程
        /// </summary>
        private void ReceiveData(SerialPort serialPort)
        {
            //同步阻塞接收数据线程
            Thread threadReceive=new Thread(new ParameterizedThreadStart(SynReceiveData));
            threadReceive.Start(serialPort);

             //也可用异步接收数据线程
            //Thread threadReceiveSub = new Thread(new ParameterizedThreadStart(AsyReceiveData));
            //threadReceiveSub.Start(serialPort);

        }

        //发送二进制数据
        private void SendBytesData(SerialPort serialPort)
        {
            byte[] bytesSend=System.Text.Encoding.Default.GetBytes(txtSend.Text );
            serialPort.Write(bytesSend, 0, bytesSend.Length);
        }

        //同步阻塞读取
        private void SynReceiveData(object serialPortobj)
        {
            SerialPort serialPort = (SerialPort)serialPortobj;
            System.Threading.Thread.Sleep(0);
            serialPort.ReadTimeout = 1000;
            try
            {
                //阻塞到读取数据或超时(这里为2秒)
                byte firstByte=Convert.ToByte(serialPort.ReadByte());
                int bytesRead=serialPort.BytesToRead ;
                byte[] bytesData=new byte[bytesRead+1];
                bytesData[0] = firstByte;
                for (int i = 1; i <=bytesRead; i++)
                    bytesData[i] = Convert.ToByte( serialPort.ReadByte());
                txtReceive.Text = System.Text.Encoding.Default.GetString(bytesData);
            }
            catch(Exception e)
            {
                MessageBox.Show(e.Message);
                //处理超时错误
            }

            serialPort.Close();

        }

        //异步读取
        private void AsyReceiveData(object serialPortobj)
        {
            SerialPort serialPort = (SerialPort)serialPortobj;
            System.Threading.Thread.Sleep(500);
            try
            {
                 txtReceive.Text =   serialPort.ReadExisting();
            }
            catch (Exception e)
            {
                MessageBox.Show(e.Message);
                //处理错误
            }
            serialPort.Close();
        }

    }

    static class Program
    {
        /// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new frmTESTSerialPort());
        }
    }

}

--------------------编程问答-------------------- 顶顶顶，我顶 --------------------编程问答-------------------- Hi,楼主你的问题解决了吗,如果解决了能不能告诉我呢.
   我正好现在也在弄这个. 对此不大清楚.
   liuyingting110@163.com

thanks --------------------编程问答-------------------- 我也碰到这个问题了.就是readline的时候死在那里了. --------------------编程问答-------------------- 请问你以上的代码在asp.net上能使用吗？serialport类在asp.net中能实现串口通信吗？ --------------------编程问答-------------------- 留个记号，备案之 --------------------编程问答-------------------- 楼主,你只需要把DataReceived事件搞清楚就OK了,这是关键. --------------------编程问答-------------------- 感谢分享。学习一下。 --------------------编程问答-------------------- 请确定你的通信参数正确. 波特率之类的. 我记得当初卡在这里卡了N久...... --------------------编程问答-------------------- 谁可以帮忙回答这个问题呀
我感觉SerialPort 控件有问题
http://topic.csdn.net/u/20081231/17/b1e674d6-a0b1-445c-936f-65653022d3a3.html
借楼主的地盘一用
谢谢 --------------------编程问答-------------------- 这个程序也是在readline的时候报错，serialPort捕捉到TimeoutException，操作超时，怎么回事啊，怎么解决啊，谢谢了 --------------------编程问答--------------------



using System;

using System.Data;

using System.Configuration;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.IO;

using System.IO.Ports;

using System.IO.Compression;

using System.IO.IsolatedStorage;



namespace FortuneWeb.Common.Port

{

    /// <summary>

    /// 1~9 串口的名称是 "COMx:",>9的以前用\\\\.\\COMx:比较好使，但是在moxa 661设备上却不行，要用如下格式"$device\\COM" + PortNo.ToString() + "\0"，也许这是moxa修改了相应的串口驱动。

    /// </summary>

    public class PortData

    {

        public event PortDataReceivedEventHandle Received;

        public event SerialErrorReceivedEventHandler Error;

        public SerialPort port;

        public bool ReceiveEventFlag = false;  //接收事件是否有效 false表示有效



        //public PortData(string sPortName, int baudrate, Parity parity, SerialInterface.SerialMode mode)

        public PortData(string sPortName, int baudrate, Parity parity)

        {

            port = new SerialPort(sPortName, baudrate, parity, 8, StopBits.One);

            port.RtsEnable = true;

            port.ReadTimeout = 3000;

            port.DataReceived += new SerialDataReceivedEventHandler(DataReceived);

            port.ErrorReceived += new SerialErrorReceivedEventHandler(ErrorEvent);

        }



        ~PortData()

        {

            Close();

        }

        public void Open()

        {

            if (!port.IsOpen)

            {

                port.Open();

            }

        }



        public void Close()

        {

            if (port.IsOpen)

            {

                port.Close();

            }

        }

        //数据发送

        public void SendData(byte[] data)

        {

            if (port.IsOpen)

            {

                port.Write(data, 0, data.Length);

            }

        }

        public void SendData(byte[] data, int offset, int count)

        {

            if (port.IsOpen)

            {

                port.Write(data, offset, count);

            }

        }

        //发送命令

        public int SendCommand(byte[] SendData, ref  byte[] ReceiveData, int Overtime)

        {



            if (port.IsOpen)

            {

                ReceiveEventFlag = true;        //关闭接收事件

                port.DiscardInBuffer();         //清空接收缓冲区                 

                port.Write(SendData, 0, SendData.Length);

                int num = 0, ret = 0;

                while (num++ < Overtime)

                {

                    if (port.BytesToRead >= ReceiveData.Length) break;

                    System.Threading.Thread.Sleep(1);

                }

                if (port.BytesToRead >= ReceiveData.Length)

                    ret = port.Read(ReceiveData, 0, ReceiveData.Length);

                ReceiveEventFlag = false;       //打开事件

                return ret;

            }

            return -1;

        }



        public void ErrorEvent(object sender, SerialErrorReceivedEventArgs e)

        {

            if (Error != null) Error(sender, e);

        }

        //数据接收

        public void DataReceived(object sender, SerialDataReceivedEventArgs e)

        {

            //禁止接收事件时直接退出

            if (ReceiveEventFlag)

            {

                return;

            }

            var data = new byte[port.BytesToRead];

            port.Read(data, 0, data.Length);

            if (Received != null) Received(sender, new PortDataReciveEventArgs(data));

        }



        public bool IsOpen()

        {

            return port.IsOpen;

        }

    }

    public delegate void PortDataReceivedEventHandle(object sender, PortDataReciveEventArgs e);

    public class PortDataReciveEventArgs : EventArgs

    {

        public PortDataReciveEventArgs()

        {

            this.data = null;

        }



        public PortDataReciveEventArgs(byte[] data)

        {

            this.data = data;

        }



        private byte[] data;



        public byte[] Data

        {

            get { return data; }

            set { data = value; }

        }

    }

}

参考FortuneBase中FortuneWeb\Common\Port

www.cnblogs.com/mail-ricklee

--------------------编程问答-------------------- 串口的参数要设置正确，如波特率，数据位等，
还有设置下串口的 writetimeout, readtimeout
同步方法可以用readto(),异步可以用 datareceiving事件 --------------------编程问答-------------------- 我们怎么用上面的那个程序接不到数据呢？是我弄错了了吗？我想用字节来接收，因为用字符是接不到汉字的！你看看是不是有问题呢？
--------------------编程问答--------------------

　　private void button1_Click(object sender, EventArgs e)

　　{

　　serialPort1.PortName = "COM1";

　　serialPort1.BaudRate = 9600;

　　serialPort1.Open();

　　byte[] data = Encoding.Unicode.GetBytes(textBox1.Text);

　　string str = Convert.ToBase64String(data);

　　serialPort1.WriteLine(str);

　　MessageBox.Show("数据发送成功！","系统提示");

　　}

　　private void button2_Click(object sender, EventArgs e)

　　{

　　byte[] data = Convert.FromBase64String(serialPort1.ReadLine());

　　textBox2.Text = Encoding.Unicode.GetString(data);

　　serialPort1.Close();

　　MessageBox.Show("数据接收成功！","系统提示");

　　}

一个简单的东西，希望对你有启发！ --------------------编程问答-------------------- 首先谢谢你，但是你用的是控件来执行的发送和接收，我是实时的发送和接收，也就是启用委托，和辅助线程！
Datareceive事件 --------------------编程问答-------------------- 大侠！请帮我看看下面的代码：
string AA = txtneirong.Text;
            FileStream fs1;
            byte[] showarray = new byte[15];
            int lstcount = AA.Length, hzcode = 0;
            int bb = 0; Int64 offVar = 0;
            for (int int1 = 0; int1 <= lstcount - 1; int1++)
            {
             fs1 = new FileStream(@"ASC16", FileMode.Open, FileAccess.Read);//读取字库
                sp.Open();
                byte[] showpara = new byte[2];
                showpara[0] = 4;//=4 意思是LED显示的模式为固定
                showpara[1] = Convert.ToByte(int1 + 1);//表示LED显示的长度
                string h = "HellA"; //发送HellA 表示与LED连接通讯信号
                sp.Write(h);
                sp.Write(showpara, 0, 2);
                hzcode = (int)Encoding.ASCII.GetBytes(AA)[bb];
                if (hzcode > -1)
                {
                    offVar = hzcode * 16 + 1;
                    fs1.Seek(offVar, SeekOrigin.Begin);
                    fs1.Read(showarray, 0, 15);
                    bb = bb + 1;
                }
               byte[] aaa=new byte[15] ;
               sp.Write(showarray, 0, showarray.Length);
                Thread.Sleep(50);
                sp.Write(showarray, 0, showarray.Length);
                sp.Close();
                fs1.Close();
            }

意思：假如AA=abc12333  的话
串口发送命令后将abc12333  显示在LED显示屏上面

问题是：abc12333  都是显示在LED显示屏的第一个位置上面  不能按顺序显示出来也就是说显示a之后，再显示b时  b就把a覆盖掉。。。
请大侠们帮我看看！！！谢谢  主要是sp.Write(showarray, 0, showarray.Length);
有误，，不知道要怎么写 --------------------编程问答--------------------

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.IO.Ports;

using System.Threading;



namespace 蓝牙

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        SerialPort serialPort1 = new SerialPort();

        private void Form1_Load(object sender, EventArgs e)

        {

           string [] str=SerialPort.GetPortNames();

           foreach (string Portname in str)

           {

               this.comboBox1.Items.Add(Portname);

           }

           serialPort1.DataReceived += new SerialDataReceivedEventHandler(serialPort1_DataReceived);

         

        }

        private void ReceiveData()

        {

            string Message = serialPort1.ReadLine();

        }



        private void button1_Click(object sender, EventArgs e)

        { 

            serialPort1.PortName = "COM1";

          

            serialPort1.BaudRate = 10000;



            

            serialPort1.Open();

            try

            {

                byte[] data = Encoding.Unicode.GetBytes("你个死串口收到没");

                string str = Convert.ToBase64String(data);

                

                serialPort1.WriteLine(str);

                MessageBox.Show("数据发送成功！", "系统提示");

            }

            catch 

            {

                MessageBox.Show("数据发送失败！", "系统提示");

            }

        }



        void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)

        {

            MessageBox.Show(serialPort1.ReadExisting(),"收到啦");

        }



        



        private void button2_Click(object sender, EventArgs e)

        {



           

        }

    }

}

--------------------编程问答-------------------- ReadLine()就死了，是怎么回事儿啊？有人可以解答吗？ --------------------编程问答-------------------- 我也是啊。我是多线程做的，每次到这里就操作超时的异常抛出来啊。急啊........ --------------------编程问答-------------------- C# 串口操作系列(4) -- 协议篇，文本协议数据解析(2010-8-20)
C# 串口操作系列(3) -- 协议篇，二进制协议数据解析(2010-8-20)
C# 串口操作系列(2) -- 入门篇，为什么我的串口程序在关闭串口时候会死锁？(2010-8-20)
C# 串口操作系列(1) -- 入门篇，一个标准的，简陋的串口例子。(2010-8-20)
全部

补充：.NET技术 ,  C#