Hey guys Sorry for my bad English I have design a microcontroller board that send commands as text to serial port by pressing some buttons
e.g.
If I press button1 sends #B1#pressed
If I press button1 sends #B2#pressed
If I press button1 sends #B3#pressed
If I press button1 sends #B4#pressed
If I press button1 sends #B5#pressed
I’m beginner with C#
I have found a code example to read the serial port and works!! But I wand some help to continuously read the serial port as the example! And to put the each button command to string variable
E.g. when the software see that the #B1#.... received, to store to a string variable,
The entire command #B1# pressed and to stop store characters when sees some new command or sees nothing!
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace SimpleSerial
{
public partial class Form1 : Form
{
// Add this variable
string RxString;
public Form1()
{
InitializeComponent();
serialPort1.PortName = "COM4";
serialPort1.BaudRate = 19200;
serialPort1.Open();
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (serialPort1.IsOpen) serialPort1.Close();
}
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
// If the port is closed, don't try to send a character.
if (!serialPort1.IsOpen) return;
// If the port is Open, declare a char[] array with one element.
char[] buff = new char[1];
// Load element 0 with the key character.
buff[0] = e.KeyChar;
// Send the one character buffer.
serialPort1.Write(buff, 0, 1);
// Set the KeyPress event as handled so the character won't
// display locally. If you want it to display, omit the next line.
e.Handled = true;
}
private void DisplayText(object sender, EventArgs e)
{
textBox1.AppendText(RxString);
}
private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
{
RxString = serialPort1.ReadExisting();
this.Invoke(new EventHandler(DisplayText));
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
}
}
}