C#

isOn = !isOn;
if(isOn)
{
   button.BackColor = Color.Red;//or something
   //code to send 'A' to port
}
else
{
   button.BackColor = Color.Blue;//or something
   //code to send 'a' to port
}

Mads115 wrote:

i need the code. for above application

==lo12365=12/08/05 12.30 lo op
==lo12589=13/08/04 12.15 li oo
==lo89099=18/05/09 12.10 io io

 using System.IO;
namespace WindowsApplication23
{
    public partial class Form1 : Form
    {
        OpenFileDialog o;
        FileInfo info;
        public Form1()
        {
            InitializeComponent();
        }
        private void button1_Click(object sender, EventArgs e)
        {
             o = new OpenFileDialog();
            if (o.ShowDialog() == DialogResult.OK)
            {
                info = new FileInfo(o.FileName);
                label1.Text = info.ToString();
            }
        }
        private void button2_Click(object sender, EventArgs e)
        {
            StreamReader reader = info.OpenText();
            textBox1.Text = reader.ReadToEnd().ToString();
            reader.Close();
        }
    }
}

StreamReader reader = new StreamReader(info.Filname);

string line = reader.ReadLine();
while(line!= null)
{
   string newLine = line.Replace("=", " ");
   string[] vals = newLine.Split(' ');//use this if you need values seperate for table
   //do something like add newLine to table, or add the string in the vals array
   line = reader.ReadLine();
}

reader.Close();

StreamReader reader = new StreamReader(info.Filname);

StreamReader reader = new StreamReader(o.FileName);

  string line = reader.ReadLine();
            while (line != null)
            {
                string newLine = line.Replace("=", " ");
                string[] vals = newLine.Split(' ');//use this if you need values seperate for table
                //do something like add newLine to table, or add the string in the vals array
                line = reader.ReadLine();
            }
//I add this 
          <big> textBox4.Text = reader.ReadLine();</big>
       reader.Close();

textBox4.Text = reader.ReadLine.ToString();

textBox4.Text = reader.ReadLine.();

yueru wrote:

string line = reader.ReadLine();
   while (line != null)
   {
      string newLine = line.Replace("=", " ");
      string[] vals = newLine.Split(' ');
      line = reader.ReadLine();
   }
//I add this
   textBox4.Text = reader.ReadLine();
   reader.Close();