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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;
namespace project4
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
System.Windows.Forms.Control.CheckForIllegalCrossThreadCalls = false;
}
private void button1_Click(object sender, EventArgs e)
{
try
{
serialPort1.PortName = comboBox1.Text;//設置串口號
serialPort1.BaudRate = Convert.ToInt32(comboBox2.Text, 10);//十進制數據轉換，設置波特率
serialPort1.Open();//打開串口
button1.Enabled = false;//打開串口按鈕不可用
button2.Enabled = true;//關閉串口按鈕可用
}
catch
{
MessageBox.Show("端口錯誤,請檢查串口", "錯誤");
}
}
private void Form1_Load(object sender, EventArgs e)
{
for (int i = 1; i < 20; i++)
{
comboBox1.Items.Add("COM" + i.ToString());
}
comboBox1.Text = "COM3";//串口號默認值
comboBox2.Text = "9600";//波特率默認值
serialPort1.DataReceived += new SerialDataReceivedEventHandler(serialPort1_DataReceived);//添加事件處理程序
}
private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
if (!radioButton3.Checked)//如果接收模式為字符模式
{
string str = serialPort1.ReadExisting();//字符串方式讀
textBox1.AppendText(str);//添加內容textBox文本框中依次向后顯示
}
else //如果接收模式為數值接收
{
//易出現異常：由于線程退出或應用程序請求，已中止 I/O 操作
//加入異常處理
try
{
int data;
data = serialPort1.ReadByte();
string str = Convert.ToString(data, 16).ToUpper();//轉換為大寫十六進制字符串
textBox1.AppendText("0x" + (str.Length == 1 ? "0" + str : str) + " ");//空位補“0”
}
catch
{
this.Close();//關閉當前窗體
}
}
}
private void button2_Click(object sender, EventArgs e)
{
try
{
serialPort1.Close();//關閉串口
button1.Enabled = true;//打開串口按鈕可用
button2.Enabled = false;//關閉串口按鈕不可用
}
catch
{
MessageBox.Show("串口關閉錯誤","錯誤");
}
}
private void button3_Click(object sender, EventArgs e)
{
byte[] Data = new byte[1];
if (serialPort1.IsOpen)//判斷串口是否打開，如果打開執行下一步操作
{
if (textBox2.Text != "")
{
if (!radioButton1.Checked)//如果發送模式是字符模式
{
try
{
serialPort1.WriteLine(textBox2.Text);//寫數據
}
catch
{
MessageBox.Show("串口數據寫入錯誤", "錯誤");//出錯提示
serialPort1.Close();
button1.Enabled = true;//打開串口按鈕可用
button2.Enabled = false;//關閉串口按鈕不可用
}
}
else
{
for (int i = 0; i < (textBox2.Text.Length - textBox2.Text.Length % 2) / 2; i++)//取余3運算作用是防止用戶輸入的字符為奇數個
{
Data[0] = Convert.ToByte(textBox2.Text.Substring(i * 2, 2), 16);
serialPort1.Write(Data, 0, 1);//循環發送（如果輸入字符為0A0BB,則只發送0A,0B）
}
if (textBox2.Text.Length % 2 != 0)//剩下一位單獨處理
{
Data[0] = Convert.ToByte(textBox2.Text.Substring(textBox2.Text.Length - 1, 1), 16);//單獨發送B（0B）
serialPort1.Write(Data, 0, 1);//發送
}
}
}
}
}
private void textBox2_TextChanged(object sender, EventArgs e)
{
if (textBox2.Text != "")
button3.Enabled = true;//只有當發送文本框內的有內容時才可以發送
else
button3.Enabled = false;
}
private void button4_Click(object sender, EventArgs e)
{
textBox1.Text="";//清屏
}
private void button5_Click(object sender, EventArgs e)
{
this.Close();
}
}
}

復制代碼

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