我用了论坛里搜到的代码，但是不全
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.IO.Ports;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace WindowsFormsApp3
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
comboBox1.Items.AddRange(System.IO.Ports.SerialPort.GetPortNames());
}
private string[] portNames = null;
private List<SerialPort> serialPorts;
private byte[] portBuffer;
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
this.serialPorts = new List<SerialPort>();
this.portNames = SerialPort.GetPortNames();
this.portBuffer = new byte[1000];
//Assign the value of port names to serial ports display
if (this.portNames.Length > 1)
{
for (int i = 0; i < this.portNames.Length; i++)
{
this.serialPorts.Add(new SerialPort(this.portNames[i]));
}
}
this.comboBox1.Items.AddRange(this.portNames);
this.comboBox2.Items.AddRange(this.portNames);
}
private void button1_Click(object sender, EventArgs e)
{
for (int i = 0; i < this.portNames.Length; i++)
{
try
{
if (this.portNames.ElementAt(i) == this.comboBox1.Text.ToString())
{
if (!this.serialPorts.ElementAt(i).IsOpen)
{
this.serialPorts.ElementAt(i).Open();
MessageBox.Show("已打开串口！");
}
//this.serialPorts.ElementAt(i).
}
}
catch (IOException eio)
{
MessageBox.Show("打开串口异常：" + eio);
}
}
}
private void button2_Click(object sender, EventArgs e)
{
for (int i = 0; i < this.portNames.Length; i++)
{
try
{
if (this.portNames.ElementAt(i) == this.comboBox1.Text.ToString())
{
if (this.serialPorts.ElementAt(i).IsOpen)
{
this.serialPorts.ElementAt(i).Close();
MessageBox.Show("已关闭串口！");
}
}
}
catch (IOException eio)
{
MessageBox.Show("关闭串口异常：" + eio);
}
}
}
private void button3_Click(object sender, EventArgs e)
{
for (int i = 0; i < this.portNames.Length; i++)
{
try
{
if (this.portNames.ElementAt(i) == this.comboBox1.Text.ToString())
{
if (this.serialPorts.ElementAt(i).IsOpen)
{
string sendContent = this.textBox1.Text.ToString();
this.serialPorts.ElementAt(i).Write(sendContent);
MessageBox.Show("已发送数据！");
}
}
}
catch (IOException eio)
{
MessageBox.Show("串口发送异常：" + eio);
}
}
}
private void timer1_Tick(object sender, EventArgs e)
{
this.AddEventHandlerForResponse();
}
private void AddEventHandlerForResponse()
{
for (int i = 0; i < this.portNames.Length; i++)
{
try
{
if (this.portNames.ElementAt(i) == this.comboBox2.Text.ToString())
{
if ((this.serialPorts.ElementAt(i).IsOpen) && (this.serialPorts.ElementAt(i).BytesToRead > 0))
{
this.serialPorts.ElementAt(i).Read(this.portBuffer, 0, this.serialPorts.ElementAt(i).BytesToRead);
this.serialPorts.ElementAt(i).DataReceived += new SerialDataReceivedEventHandler(this.DataReceiveEventHandler);
}
}
}
catch (IOException eio)
{
MessageBox.Show("串口异常：" + eio);
}
}
}
private void DataReceiveEventHandler(object sender, SerialDataReceivedEventArgs e)
{
SerialPort sp = (SerialPort)sender;
this.textBox2.Invoke(
new MethodInvoker(
delegate
{
this.textBox2.AppendText(sp.ReadExisting());
this.textBox2.Text += " ";
}
)
);
}
private void button4_Click(object sender, EventArgs e)
{
}
}
}
运行出来的结果，根本接收不到，求解哪里错了啊
