串口通讯代码 (1).doc

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1、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; /导入串口的命名空间namespace _01_SerialPort public partial class Form1 : Form public delegate void showReceive

2、Delegate(string text); /当采用响应模式，应申明一个委托，实现不同线程的控件实验 SerialPort com = new SerialPort(COM2, 9600, Parity.None, 8, StopBits.One);/初始化构造函数 public Form1() InitializeComponent(); / / 窗体加载 / / / private void Form1_Load(object sender, EventArgs e) cmbPort.SelectedIndex = 0; cmbBaudRate.SelectedIndex = 0; cm

3、bDataBits.SelectedIndex = 0; cmbStopBits.SelectedIndex = 0; cmbParity.SelectedIndex = 0; / / 串口打开与关闭 / / / private void btnOpen_Click(object sender, EventArgs e) if (btnOpen.Text = 打开串口) try if (!com.IsOpen) com.PortName = cmbPort.Text; com.BaudRate = int.Parse(cmbBaudRate.Text); com.DataBits = int.

4、Parse(cmbDataBits.Text); switch (cmbStopBits.SelectedIndex) case 0: com.StopBits = StopBits.One; break; case 1: com.StopBits = StopBits.Two; break; case 2: com.StopBits = StopBits.OnePointFive; break; case 3: com.StopBits = StopBits.None; break; switch (cmbParity.SelectedIndex) case 0: com.Parity =

5、Parity.None; break; case 1: com.Parity = Parity.Odd; break; case 2: com.Parity = Parity.Even; break; com.Open();/打开串口 btnOpen.Text = 关闭串口; txtStatus.Text = 串口已打开！; btnSend.Enabled = true; if (rbAck.Checked) btnReceive.Enabled = true; /应答模式，接收按钮有效 catch txtStatus.Text = 串口打开错误或串口不存在！; else /关闭串口 try

6、if (com.IsOpen) com.Close(); /关闭串口 btnOpen.Text = 打开串口; txtStatus.Text = 串口已关闭！; btnSend.Enabled = false ; if (rbAck.Checked) btnReceive.Enabled = false; /应答模式，接收按钮有效 catch txtStatus.Text = 串口关闭错误或串口不存在！; / / 串口发送数据 / / / private void btnSend_Click(object sender, EventArgs e) try byte data = null; i

7、f(chkSendHex.Checked) data = getBytesFromString(txtSend.Text); else data = Encoding.Default.GetBytes(txtSend.Text); com.Write(data, 0, data.Length); catch (Exception err) txtStatus.Text = err.ToString(); / / 串口接收数据，应答模式时 / / / private void btnReceive_Click(object sender, EventArgs e) try /应答模式 int c

8、ount = com.BytesToRead; byte readBuffer = new bytecount; com.Read(readBuffer, 0, count); if (chkRecHex.Checked) txtReceive.Text = getStringFromBytes(readBuffer); /转十六进制 else txtReceive.Text = Encoding.Default.GetString(readBuffer); /字母、数字、汉字转换为字符串 catch (Exception err) txtStatus.Text = err.ToString(

9、); / / 数据接收模式变化时，设置串口的数据接收侦听事件 / / / private void rbResponse_CheckedChanged(object sender, EventArgs e) try btnReceive.Enabled = rbAck.Checked; if(rbResponse.Checked) com.DataReceived += new SerialDataReceivedEventHandler(com_DataReceived); /加载接收事件 else com.DataReceived -= new SerialDataReceivedEven

10、tHandler(com_DataReceived); /移除接收事件 catch (Exception err) txtStatus.Text = err.ToString(); / / 响应模式时，串口接收数据事件 / / / private void com_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e) try int count = com.BytesToRead; byte readBuffer = new bytecount; com.Read(readBuffer, 0, co

11、unt); string strReceive=; if(chkRecHex.Checked) strReceive = getStringFromBytes(readBuffer); /转十六进制 else strReceive = Encoding.Default.GetString(readBuffer); /字母、数字、汉字转换为字符串 this.Invoke(new showReceiveDelegate(doShowReceive), strReceive); catch (Exception err) txtStatus.Text = err.ToString(); / / /异

12、步线程处理接受的字符，显示在接收的文本框中 / / public void doShowReceive(string str) txtReceive.Text += str; / / 以十六进制数据发送转换时，显示转换对应数据 / / / private void chkSendHex_CheckedChanged(object sender, EventArgs e) try if (chkSendHex.Checked) txtSend.Text = getStringFromBytes( Encoding.Default.GetBytes(txtSend.Text); else txtS

13、end.Text =Encoding.Default.GetString(getBytesFromString(txtSend.Text); catch txtStatus.Text = 数据转换出错，请输入正确的数据格式; / / 以十六进制数据显示接收数据时，显示对应数据 / / private void chkRecHex_CheckedChanged(object sender, EventArgs e) try if (chkRecHex.Checked) txtReceive.Text = getStringFromBytes(Encoding.Default.GetBytes(t

14、xtReceive.Text); else txtReceive.Text = Encoding.Default.GetString(getBytesFromString(txtReceive.Text); catch txtStatus.Text =数据转换出错，请输入正确的数据格式; / / 把十六进制格式的字符串转换成字节数组。 / / 要转换的十六进制格式的字符串 / 返回字节数组。 public static byte getBytesFromString(string pString) string str = pString.Split( ); /把十六进制格式的字符串按空格转换

15、为字符串数组。 byte bytes = new bytestr.Length; /定义字节数组并初始化，长度为字符串数组的长度。 for (int i = 0; i str.Length; i+) /遍历字符串数组，把每个字符串转换成字节类型赋值给每个字节变量。 bytesi = Convert.ToByte(Convert.ToInt32(stri, 16); return bytes; /返回字节数组。 / / 把字节数组转换为十六进制格式的字符串。 / / 要转换的字节数组。 / 返回十六进制格式的字符串。 public static string getStringFromBytes(byte pByte) string str = ; /定义字符串类型临时变量。 /遍历字节数组，把每个字节转换成十六进制字符串，不足两位前面添“0”，以空格分隔累加到字符串变量里。 for (int i = 0; i pByte.Length; i+) str += (pBytei.ToString(X).PadLeft(2, 0) + ); str = str.TrimEnd( ); /去掉字符串末尾的空格。 return str; /返回字符串临时变量。 private void groupBox2_Enter(object sender, EventArgs e)