C#结合串口通信类实现串口通信源代码

mycom是串口通信类，在本blog前一篇中有完整代码。
下面是串口通讯测试程序的源代码，将mycom类放在此项目中
可以实现简单的串口通信，希望读者能通过这个程序对串口通信过程有一个初步的了解：

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Threading;
namespace BusApp
{
 /// <summary>
 /// Form1 的摘要说明。
 /// </summary>
 public class Form1 : System.Windows.Forms.Form
 {
  private System.Windows.Forms.Label label1;
  private System.Windows.Forms.Label label2;
  private System.Windows.Forms.Button button1;
  private System.Windows.Forms.GroupBox groupBox1;
  private System.Windows.Forms.Label label3;
  private System.Windows.Forms.Label label4;
  private System.Windows.Forms.Label label5;
  private System.Windows.Forms.Label label6;
  private System.Windows.Forms.Button button2;
  private System.Windows.Forms.Button button3;
  private System.Windows.Forms.Button button4;
  private System.Windows.Forms.TextBox textBox8;
  private System.Windows.Forms.Label label7;

  public int iPort=1; //1,2,3,4
  public int iRate=9600; //1200,2400,4800,9600
  public byte bSize=8; //8 bits
  public byte bParity=0; // 0-4=no,odd,even,mark,space
  public byte bStopBits=1; // 0,1,2 = 1, 1.5, 2
  public int iTimeout=1000;
  public mycom mycom1=new mycom();
  public byte[] recb;

  private System.Windows.Forms.TextBox msg;
  private System.Windows.Forms.TextBox t_port;
  private System.Windows.Forms.TextBox t_rate;
  private System.Windows.Forms.TextBox t_bytesize;
  private System.Windows.Forms.TextBox t_stopbyte;
  private System.Windows.Forms.TextBox t_parity;
  private System.Windows.Forms.TextBox t_send;
  private System.Windows.Forms.Button button5; //readTimeOut
  /// <summary>
  /// 必需的设计器变量。
  /// </summary>
  private System.ComponentModel.Container components = null;

  public Form1()
  {
   InitializeComponent();
  }

  /// <summary>
  /// 清理所有正在使用的资源。
  /// </summary>
  protected override void Dispose( bool disposing )
  {
   if( disposing )
   {
    if (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.msg = new System.Windows.Forms.TextBox();
   this.label1 = new System.Windows.Forms.Label();
   this.label2 = new System.Windows.Forms.Label();
   this.t_send = new System.Windows.Forms.TextBox();
   this.button1 = new System.Windows.Forms.Button();
   this.groupBox1 = new System.Windows.Forms.GroupBox();
   this.button2 = new System.Windows.Forms.Button();
   this.t_port = new System.Windows.Forms.TextBox();
   this.label3 = new System.Windows.Forms.Label();
   this.t_rate = new System.Windows.Forms.TextBox();
   this.label4 = new System.Windows.Forms.Label();
   this.t_bytesize = new System.Windows.Forms.TextBox();
   this.label5 = new System.Windows.Forms.Label();
   this.t_stopbyte = new System.Windows.Forms.TextBox();
   this.label6 = new System.Windows.Forms.Label();
   this.t_parity = new System.Windows.Forms.TextBox();
   this.button3 = new System.Windows.Forms.Button();
   this.button4 = new System.Windows.Forms.Button();
   this.textBox8 = new System.Windows.Forms.TextBox();
   this.label7 = new System.Windows.Forms.Label();
   this.button5 = new System.Windows.Forms.Button();
   this.groupBox1.SuspendLayout();
   this.SuspendLayout();
   //
   // msg
   //
   this.msg.ForeColor = System.Drawing.Color.Green;
   this.msg.Location = new System.Drawing.Point(0, 0);
   this.msg.Multiline = true;
   this.msg.Name = "msg";
   this.msg.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
   this.msg.Size = new System.Drawing.Size(512, 264);
   this.msg.TabIndex = 0;
   this.msg.Text = "";
   //
   // label1
   //
   this.label1.Location = new System.Drawing.Point(16, 24);
   this.label1.Name = "label1";
   this.label1.Size = new System.Drawing.Size(56, 16);
   this.label1.TabIndex = 1;
   this.label1.Text = "串口号：";
   //
   // label2
   //
   this.label2.ForeColor = System.Drawing.Color.FromArgb(((System.Byte)(192)), ((System.Byte)(64)), ((System.Byte)(0)));
   this.label2.Location = new System.Drawing.Point(8, 280);
   this.label2.Name = "label2";
   this.label2.Size = new System.Drawing.Size(80, 16);
   this.label2.TabIndex = 1;
   this.label2.Text = "设置数据包：";
   //
   // t_send
   //
   this.t_send.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
   this.t_send.ForeColor = System.Drawing.Color.FromArgb(((System.Byte)(255)), ((System.Byte)(128)), ((System.Byte)(0)));
   this.t_send.Location = new System.Drawing.Point(80, 272);
   this.t_send.Name = "t_send";
   this.t_send.Size = new System.Drawing.Size(344, 21);
   this.t_send.TabIndex = 2;
   this.t_send.Text = "";
   //
   // button1
   //
   this.button1.Location = new System.Drawing.Point(432, 272);
   this.button1.Name = "button1";
   this.button1.Size = new System.Drawing.Size(40, 23);
   this.button1.TabIndex = 3;
   this.button1.Text = "发送";
   this.button1.Click += new System.EventHandler(this.button1_Click);
   //
   // groupBox1
   //
   this.groupBox1.Controls.Add(this.button2);
   this.groupBox1.Controls.Add(this.t_port);
   this.groupBox1.Controls.Add(this.label1);
   this.groupBox1.Controls.Add(this.label3);
   this.groupBox1.Controls.Add(this.t_rate);
   this.groupBox1.Controls.Add(this.label4);
   this.groupBox1.Controls.Add(this.t_bytesize);
   this.groupBox1.Controls.Add(this.label5);
   this.groupBox1.Controls.Add(this.t_stopbyte);
   this.groupBox1.Controls.Add(this.label6);
   this.groupBox1.Controls.Add(this.t_parity);
   this.groupBox1.ForeColor = System.Drawing.Color.FromArgb(((System.Byte)(192)), ((System.Byte)(64)), ((System.Byte)(0)));
   this.groupBox1.Location = new System.Drawing.Point(8, 304);
   this.groupBox1.Name = "groupBox1";
   this.groupBox1.Size = new System.Drawing.Size(176, 216);
   this.groupBox1.TabIndex = 4;
   this.groupBox1.TabStop = false;
   this.groupBox1.Text = "参数设置";
   //
   // button2
   //
   this.button2.FlatStyle = System.Windows.Forms.FlatStyle.Popup;
   this.button2.Location = new System.Drawing.Point(80, 184);
   this.button2.Name = "button2";
   this.button2.TabIndex = 3;
   this.button2.Text = "应用设置";
   this.button2.Click += new System.EventHandler(this.button2_Click);
   //
   // t_port
   //
   this.t_port.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
   this.t_port.Location = new System.Drawing.Point(80, 16);
   this.t_port.Name = "t_port";
   this.t_port.Size = new System.Drawing.Size(80, 21);
   this.t_port.TabIndex = 2;
   this.t_port.Text = "1";
   //
   // label3
   //
   this.label3.Location = new System.Drawing.Point(16, 58);
   this.label3.Name = "label3";
   this.label3.Size = new System.Drawing.Size(56, 16);
   this.label3.TabIndex = 1;
   this.label3.Text = "波特率：";
   //
   // t_rate
   //
   this.t_rate.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
   this.t_rate.Location = new System.Drawing.Point(80, 50);
   this.t_rate.Name = "t_rate";
   this.t_rate.Size = new System.Drawing.Size(80, 21);
   this.t_rate.TabIndex = 2;
   this.t_rate.Text = "9600";
   //
   // label4
   //
   this.label4.Location = new System.Drawing.Point(16, 92);
   this.label4.Name = "label4";
   this.label4.Size = new System.Drawing.Size(56, 16);
   this.label4.TabIndex = 1;
   this.label4.Text = "数据位：";
   //
   // t_bytesize
   //
   this.t_bytesize.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
   this.t_bytesize.Location = new System.Drawing.Point(80, 84);
   this.t_bytesize.Name = "t_bytesize";
   this.t_bytesize.Size = new System.Drawing.Size(80, 21);
   this.t_bytesize.TabIndex = 2;
   this.t_bytesize.Text = "8";
   //
   // label5
   //
   this.label5.Location = new System.Drawing.Point(16, 126);
   this.label5.Name = "label5";
   this.label5.Size = new System.Drawing.Size(56, 16);
   this.label5.TabIndex = 1;
   this.label5.Text = "停止位：";
   //
   // t_stopbyte
   //
   this.t_stopbyte.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
   this.t_stopbyte.Location = new System.Drawing.Point(80, 118);
   this.t_stopbyte.Name = "t_stopbyte";
   this.t_stopbyte.Size = new System.Drawing.Size(80, 21);
   this.t_stopbyte.TabIndex = 2;
   this.t_stopbyte.Text = "1";
   //
   // label6
   //
   this.label6.Location = new System.Drawing.Point(16, 160);
   this.label6.Name = "label6";
   this.label6.Size = new System.Drawing.Size(56, 16);
   this.label6.TabIndex = 1;
   this.label6.Text = "校验位：";
   //
   // t_parity
   //
   this.t_parity.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
   this.t_parity.Enabled = false;
   this.t_parity.Location = new System.Drawing.Point(80, 152);
   this.t_parity.Name = "t_parity";
   this.t_parity.Size = new System.Drawing.Size(80, 21);
   this.t_parity.TabIndex = 2;
   this.t_parity.Text = "0";
   //
   // button3
   //
   this.button3.Location = new System.Drawing.Point(472, 272);
   this.button3.Name = "button3";
   this.button3.Size = new System.Drawing.Size(40, 23);
   this.button3.TabIndex = 3;
   this.button3.Text = "清空";
   this.button3.Click += new System.EventHandler(this.button3_Click);
   //
   // button4
   //
   this.button4.FlatStyle = System.Windows.Forms.FlatStyle.Popup;
   this.button4.Location = new System.Drawing.Point(432, 312);
   this.button4.Name = "button4";
   this.button4.Size = new System.Drawing.Size(72, 23);
   this.button4.TabIndex = 6;
   this.button4.Text = "初始化";
   //
   // textBox8
   //
   this.textBox8.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
   this.textBox8.ForeColor = System.Drawing.Color.FromArgb(((System.Byte)(255)), ((System.Byte)(128)), ((System.Byte)(0)));
   this.textBox8.Location = new System.Drawing.Point(288, 312);
   this.textBox8.Name = "textBox8";
   this.textBox8.Size = new System.Drawing.Size(136, 21);
   this.textBox8.TabIndex = 7;
   this.textBox8.Text = "";
   //
   // label7
   //
   this.label7.Location = new System.Drawing.Point(200, 320);
   this.label7.Name = "label7";
   this.label7.Size = new System.Drawing.Size(100, 16);
   this.label7.TabIndex = 8;
   this.label7.Text = "设置本机地址：";
   //
   // button5
   //
   this.button5.FlatStyle = System.Windows.Forms.FlatStyle.Popup;
   this.button5.Location = new System.Drawing.Point(440, 504);
   this.button5.Name = "button5";
   this.button5.Size = new System.Drawing.Size(64, 23);
   this.button5.TabIndex = 9;
   this.button5.Text = "关闭串口";
   this.button5.Click += new System.EventHandler(this.button5_Click);
   //
   // Form1
   //
   this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
   this.ClientSize = new System.Drawing.Size(512, 533);
   this.Controls.Add(this.button5);
   this.Controls.Add(this.textBox8);
   this.Controls.Add(this.label7);
   this.Controls.Add(this.button4);
   this.Controls.Add(this.groupBox1);
   this.Controls.Add(this.button1);
   this.Controls.Add(this.t_send);
   this.Controls.Add(this.msg);
   this.Controls.Add(this.label2);
   this.Controls.Add(this.button3);
   this.Name = "Form1";
   this.Text = "串口通讯（小y设计）";
   this.Closing += new System.ComponentModel.CancelEventHandler(this.Form1_Closing);
   this.Load += new System.EventHandler(this.Form1_Load);
   this.groupBox1.ResumeLayout(false);
   this.ResumeLayout(false);

  }
  #endregion

  /// <summary>
  /// 应用程序的主入口点。
  /// </summary>
  [STAThread]
  static void Main()
  {
   Application.Run(new Form1());
  }
//程序开启，串口初始化
  private void Form1_Load(object sender, System.EventArgs e)
  {
   mycom1.PortNum=iPort;
   mycom1.BaudRate=iRate;
   mycom1.ByteSize=bSize;
   mycom1.Parity=bParity;
   mycom1.StopBits=bStopBits;
   mycom1.ReadTimeout=iTimeout;
   if(this.OpenCom())
    msg.AppendText("串口初始化成功……\r\n");
   else
    msg.AppendText("串口初始化失败！\r\n");
  }
//显示包信息
  public string dis_package(byte[] reb)
  {
   string temp="";
   foreach(byte b in reb)
    temp+=b.ToString("X2")+" ";
   return temp;
  }
//开串口
  public bool OpenCom()
  {
   try
   {
　    if (mycom1.Opened)
　    {
　　    mycom1.Close();
　　    mycom1.Open(); //打开串口
　    }
　    else
　    {
　　    mycom1.Open();//打开串口
　    }
　    return true;
   }
   catch(Exception e)
   {
　    MessageBox.Show("错误：" + e.Message);
　    return false;
   }

  }
//发送按钮
  private void button1_Click(object sender, System.EventArgs e)
  {
   if(t_send.Text=="")
   {MessageBox.Show("发送数据为空！");return;}
   byte[] temp1=mysendb();
   int sendnumb=0;
   try
   {
    sendnumb=mycom1.Write(temp1);
     msg.AppendText("\r\n发送数据("+sendnumb+")："+dis_package(temp1));
    recb=mycom1.Read(50);
    //if(recb.Length!=0)
     msg.AppendText("\r\n接收到数据包："+dis_package(recb));
   }
   catch
   {msg.AppendText("\r\n发送失败！");return;}
   
   //OpenCom();
  }
//去掉发送数组中的空格
  public string delspace(string putin)
  {
   string putout="";
   for(int i=0;i<putin.Length;i++)
   {
    if(putin[i]!=' ')
     putout+=putin[i];
   }
   return putout;
  }
//提取数据包
  public byte[] mysendb()
  {
   string temps=delspace(t_send.Text);
   byte[] tempb=new byte[50];
   int j=0;
   for(int i=0;i<temps.Length;i=i+2,j++)
    tempb[j]=Convert.ToByte(temps.Substring(i,2),16);
   byte[] send=new byte[j];
   Array.Copy(tempb,send,j);
   return send;
  }
//清空按钮
  private void button3_Click(object sender, System.EventArgs e)
  {
   t_send.Text=string.Empty;
   msg.Text=string.Empty;
  }

//参数设置
  private void button2_Click(object sender, System.EventArgs e)
  {
   iPort=Convert.ToInt16(t_port.Text); //1,2,3,4
   iRate=Convert.ToInt16(t_rate.Text); //1200,2400,4800,9600
   bSize=Convert.ToByte(t_bytesize.Text,10); //8 bits
   bParity=Convert.ToByte(t_parity.Text,10); // 0-4=no,odd,even,mark,space
   bStopBits=Convert.ToByte(t_stopbyte.Text,10); // 0,1,2 = 1, 1.5, 2
   //iTimeout=3;
   if(this.OpenCom())
    msg.AppendText("串口初始化成功……\r\n");
   else
    msg.AppendText("串口初始化失败！\r\n");
  }
//程序关闭，结束串口
  private void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e)
  {
   mycom1.Close();
  }

  private void button5_Click(object sender, System.EventArgs e)
  {
   if(mycom1.Opened)
   {
    mycom1.Close();
    button5.Text="开启串口";
    msg.AppendText("\r\n串口被关闭……");
   }
   else
   {
    mycom1.Open();
    button5.Text="关闭串口";
    msg.AppendText("\r\n串口成功开启……");
   }
  }
 }
}

注意：发送数据包的格式是16进制数据如：02 45 66 FA  中间可以有或者没有空格，但要保证有偶数位