实例介绍
【实例简介】
获取电脑连接在串口和数据
【实例截图】

【核心代码】
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 PortTool
{
public partial class Main : Form
{
public delegate void showReceiveDelegate (string text);
SerialPort com = new SerialPort ("COM2", 9600, Parity.None, 8, StopBits.One);
public Main ()
{
InitializeComponent ();
}
private void Main_Load (object sender, EventArgs e)
{
List<string> listPort = new List<string> ();
//获取串口
foreach (string vPortName in SerialPort.GetPortNames ())
{
listPort.Add (vPortName);
}
this.comboBoxPort.DataSource = listPort;
this.comboBoxBuadRate.SelectedIndex = 0;
this.comboBoxDataBits.SelectedIndex = 0;
this.comboBoxParity.SelectedIndex = 0;
this.comboBoxPort.SelectedIndex = 0;
this.comboBoxStopBits.SelectedIndex = 0;
}
private void buttonOpen_Click (object sender, EventArgs e)
{
if (buttonOpen.Text == "打开串口")
{
try
{
if (!com.IsOpen)
{
com.PortName = comboBoxPort.Text;
com.BaudRate = Convert.ToInt32 (comboBoxBuadRate.Text);
com.DataBits = Convert.ToInt32 (comboBoxDataBits.Text);
//停止位
switch (comboBoxStopBits.SelectedIndex)
{
case 0:
com.StopBits = StopBits.One;
break;
case 1:
com.StopBits = StopBits.OnePointFive;
break;
case 2:
com.StopBits = StopBits.Two;
break;
case 3:
com.StopBits = StopBits.None;
break;
default:
com.StopBits = StopBits.One;
break;
}
//校验位
switch (comboBoxParity.SelectedIndex)
{
case 0:
com.Parity = Parity.None;
break;
case 1:
com.Parity = Parity.Odd;
break;
case 2:
com.Parity = Parity.Even;
break;
default:
break;
}
//打开串口
com.Open ();
this.buttonSend.Enabled = true;
this.buttonReceive.Enabled = true;
this.textBoxStates.Text = "串口已经打开";
this.buttonOpen.Text = "关闭串口";
}
}
catch (Exception ex)
{
MessageBox.Show (ex.Message, "打开失败");
}
}
else
{
try
{
com.Close ();
this.buttonSend.Enabled = false;
this.buttonReceive.Enabled = false;
this.textBoxStates.Text = "串口已经关闭";
}
catch (Exception ex)
{
MessageBox.Show (ex.Message, "关闭失败");
}
this.buttonOpen.Text = "打开串口";
this.textBoxStates.Text = "串口已经关闭";
}
}
private void buttonSend_Click (object sender, EventArgs e)
{
try
{
byte[] data = null;
//是否是hex发送
if (checkBoxSendHex.Checked)
{
data = getBytesFromString (textBoxSend.Text);
}
else
{
data = Encoding.Default.GetBytes (textBoxSend.Text);
}
com.Write (data, 0, data.Length);
}
catch (Exception ex)
{
MessageBox.Show (ex.Message, "发送失败");
}
}
/// <summary>
/// 字符串转字节
/// </summary>
/// <param name="pString"></param>
/// <returns></returns>
public static byte[] getBytesFromString (string pString)
{
string[] str = pString.Split (' ');
byte[] bytes = new byte[str.Length];
for (int i = 0; i < str.Length; i )
{
bytes[i] = Convert.ToByte (Convert.ToInt32 (str[i], 16));
}
return bytes;
}
/// <summary>
/// 字节转字符
/// </summary>
/// <param name="pByte"></param>
/// <returns></returns>
public static string getStringFromBytes (byte[] pByte)
{
string str = "";
for (int i = 0; i < pByte.Length; i )
{
str = (pByte[i].ToString ("X").PadLeft (2, '0') " ");
}
str = str.TrimEnd (' ');
return str;
}
private void buttonReceive_Click (object sender, EventArgs e)
{
//应答模式
int count = com.BytesToRead;
byte[] readBuffer = new byte[count];
com.Read (readBuffer, 0, count);
if (checkBoxReceive.Checked)
{
textBoxReceive.Text = getStringFromBytes (readBuffer);
}
else
{
textBoxReceive.Text = Encoding.Default.GetString (readBuffer);
}
}
private void radioButtonResponse_CheckedChanged (object sender, EventArgs e)
{
try
{
buttonReceive.Enabled = radioButtonAck.Checked;
if (radioButtonResponse.Checked)
{
com.DataReceived = new SerialDataReceivedEventHandler(com_DataReceived);
}
else
{
com.DataReceived -= new SerialDataReceivedEventHandler(com_DataReceived);
}
}
catch (Exception ex)
{
MessageBox.Show (ex.Message);
}
}
private void com_DataReceived(object sender,System.IO.Ports.SerialDataReceivedEventArgs e)
{
try
{
int count = com.BytesToRead;
byte[] readBuffer = new byte[count];
com.Read (readBuffer,0,count);
string strReceive = "";
if (checkBoxReceive.Checked)
{
strReceive = getStringFromBytes (readBuffer);
}
else
{
strReceive = Encoding.Default.GetString (readBuffer);
this.Invoke (new showReceiveDelegate(doShowReceive),strReceive);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
public void doShowReceive (string str)
{
textBoxReceive.Text = str;
}
private void buttonLedOpen_Click (object sender, EventArgs e)
{
}
//private void timer1_Tick (object sender, EventArgs e)
//{
// if (!radioButtonResponse.Checked)
// {
// return;
// }
// try
// {
// int count = com.BytesToRead;
// byte[] readBuffer = new byte[count];
// com.Read (readBuffer, 0, count);
// string strReceive = "";
// if (checkBoxReceive.Checked)
// {
// strReceive = getStringFromBytes (readBuffer);
// }
// else
// {
// strReceive = Encoding.Default.GetString (readBuffer);
// this.Invoke (new showReceiveDelegate (doShowReceive), strReceive);
// }
// }
// catch (Exception ex)
// {
// MessageBox.Show (ex.Message);
// }
//}
}
}
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