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#2
wangnannan2014-06-03 08:29
 程序代码：private void button1_Click(object sender, EventArgs e) { serialPort1.PortName = "COM2"; serialPort1.BaudRate = 9600; serialPort1.DataReceived +=new SerialDataReceivedEventHandler(serialPort1_DataReceived); serialPort1.Open(); byte[] data = Encoding.Unicode.GetBytes(textBox2.Text); string str = Convert.ToBase64String(data); serialPort1.WriteLine(str); MessageBox.Show("数据发送成功！", "系统提示"); } private string buffer; private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e) { this.buffer += this.serialPort1.ReadExisting(); } private void button2_Click(object sender, EventArgs e) { textBox2.Text = buffer; serialPort1.Close(); MessageBox.Show("数据接收成功！", "系统提示"); } |
最近在做光通信，通过USB口读取数据，以下是编的代码，但是发现从“comm.BaudRate = 9600; ”这个语句之后貌似就直接跳过不运行了，不知道问题出在哪里，求老师们帮助。多谢！！
using System;
using System.Collections.Generic;
using
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using
using System.Text.RegularExpressions;
using System.Threading;
namespace 读串口
{
public partial class Form1 : Form
{
private string ll = "55";
private StringBuilder builder = new StringBuilder();
private SerialPort comm = new SerialPort();
//private Thread thread;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
comm.PortName = "COM1";
comm.BaudRate = 9600;
//comm.Open();
int n;
//while (true)
//{
//System.Threading.Thread.Sleep(2000);
n = comm.BytesToRead;
byte[] buf = new byte[n];
comm.Read(buf, 0, n);
ll = Encoding.Default.GetString(buf);
//MessageBox.Show(ll);
if (ll.StartsWith("U"))
{
ll = "55";
}
else
{
ll = "66";
}
comm.Close();
textBox1.Text = ll;
}
}
}