using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO.Ports;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace ChuanKou
{
public partial class Serial : Form
{
public Serial()
{
InitializeComponent();
}
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
}
private void comboBox2_SelectedIndexChanged(object sender, EventArgs e)
{
}
/// <summary>
/// form页面加载数据
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Serial_Load(object sender, EventArgs e)
{
for(int i = 1; i < 20; i++)
{
comboBox1.Items.Add("COM" + i.ToString());
}
comboBox1.Text = "COM1";//设置端口的默认值
comboBox2.Text = "4800";//设置波特的默认值
/***************非常重要*********************/
serialPort1.DataReceived += new SerialDataReceivedEventHandler(port_DataReceived);
}
/// <summar
/// 处理串口接收的数据
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void port_DataReceived(object sender,SerialDataReceivedEventArgs e)
{
if (!radioButton2.Checked)
{
//如果接收模式为字符模式
string str = serialPort1.ReadExisting();//字符串方式读
textBox1.AppendText(str);//添加内容
}
else
{
//如果接收模式为数值模式接收
byte data;
data=(byte)serialPort1.ReadByte();//此处需要强制装换，将int类型转换为byte类型
string str = Convert.ToString(data, 16).ToUpper();//转换为大写的十六进制的字符串
textBox1.AppendText("0x" + (str.Length == 1 ? "0" + str : str) + " ");//空位补0
}
}
/// <summary>
/// 打开端口事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void open_Click(object sender, EventArgs e)
{
try
{
serialPort1.PortName = port.Text;//获取端口信息
serialPort1.BaudRate = Convert.ToInt32(bote.Text,10);//波特率十进制数据转换
serialPort1.Open();
open.Enabled = false; //打开串口按钮不可用
close.Enabled = true;//关闭串口可用
}
catch
{
MessageBox.Show("端口错误，请检查串口", "错误");
}
}
/// <summary>
/// 关闭串口事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void close_Click(object sender, EventArgs e)
{
try
{
serialPort1.Close();//关闭串口
open.Enabled = true;//打开串口可用
close.Enabled = false;//关闭串口不可用
}
catch(Exception err)
{
//一般情况下不会出错，所以不做处理
}
}
/// <summary>
/// 发送按钮的点击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button3_Click(object sender, EventArgs e)
{
byte[] Data = new byte[1];//作用同上集
if (serialPort1.IsOpen)
{
//判断串口是否打开，如果打开了执行下一步
if (textBox2.Text != "")
{
//发送的信息不为空
if (!radioButton1.Checked)
{
//如果发送模式为字符模式
try
{
serialPort1.WriteLine(textBox2.Text);//写数据
}
catch (Exception err)
{
MessageBox.Show("串口数据写入错误", "错误");
serialPort1.Close();//关闭串口
open.Enabled = true;//调整打开和关闭
open.Enabled = false;
}
}
else
{
try
{
//如果发送的是数值
for (int i = 0; i < (textBox2.Text.Length - textBox2.Text.Length % 2) / 2; i++)
{
Data[0] = Convert.ToByte(textBox2.Text.Substring(i * 2, 2), 16);
serialPort1.Write(Data, 0, 1);//循环发送，如果输入字符为0A0ABB，则只发送0A 0B
}
if (textBox2.Text.Length % 2 != 0)
{
//剩余一位单独处理
Data[0] = Convert.ToByte(textBox2.Text.Substring(textBox2.Text.Length - 1, 1), 16);//单独发送B（0B)
serialPort1.Write(Data, 0, 1);
}
}
catch (Exception err)
{
MessageBox.Show("串口数据写入错误", "错误");
serialPort1.Close();//关闭串口
open.Enabled = true;//调整打开和关闭
open.Enabled = false;
}
}
}
}
}
/// <summary>
/// 文本框1的处理
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void textBox1_TextChanged(object sender, EventArgs e)
{
}
}
}
效果图：
