C#

Pete O'Hanlon wrote:

As it is, you're making assumptions.

Pete O'Hanlon wrote:

It's always worth seeking clarification if something could have multiple meanings.

Erkanh wrote:

Than each of pixel row will send I/0 card as 256 bit message data.

Shubhanshu Pathak wrote:

I was not aware about it.

public partial class Form1 : Form
{
  public delegate void ListBoxItemClickHandler(string itemText);

  private ListBoxItemClickHandler OnListBoxItemClick;

  public Form1()
  {
    InitializeComponent();
  }

  private void Form1_Load(object sender, EventArgs e)
  {
    listBox1.Items.Add("monkey");
    listBox1.Items.Add("nut");
    listBox1.Items.Add("car");

    Form2 frm = new Form2();
    OnListBoxItemClick += new ListBoxItemClickHandler(frm.ShowItem);
    frm.Show();
  }

  private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
  {
    if (OnListBoxItemClick != null) OnListBoxItemClick(listBox1.SelectedItem.ToString());
  }
}

public partial class Form2 : Form
{
  public Form2()
  {
    InitializeComponent();
  }

  public void ShowItem(string itemText)
  {
    textBox1.Text = itemText;
  }
}

public interface IObservable
{
  void AddObserver(IObserver observer);
  void NotifyObservers(object obj);
  void RemoveObserver(IObserver observer);
}

public interface IObserver
{
  void Update(object obj);
}

public partial class Form1 : Form, IObservable
{
  public string ItemText { get; private set; }

  private List<IObserver> _Observers = new List<IObserver>();

  public Form1()
  {
    InitializeComponent();
  }

  private void Form1_Load(object sender, EventArgs e)
  {
    listBox1.Items.Add("monkey");
    listBox1.Items.Add("nut");
    listBox1.Items.Add("car");

    for (int k = 0; k < 3; k++)
    {
      Form2 frm = new Form2();
      frm.Text = k.ToString();
      AddObserver(frm);
      frm.FormClosed += new FormClosedEventHandler(frm_FormClosed);
      frm.Show();
    }
  }

  private void frm_FormClosed(object sender, FormClosedEventArgs e)
  {
    RemoveObserver(sender as IObserver);
  }

  private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
  {
    ItemText = listBox1.SelectedItem.ToString();
    NotifyObservers(this.listBox1);
  }

  public void AddObserver(IObserver observer)
  {
    _Observers.Add(observer);
  }

  public void NotifyObservers(object obj)
  {
    foreach (var observer in _Observers)
    {
      observer.Update(obj);
    }
  }

  public void RemoveObserver(IObserver observer)
  {
    _Observers.Remove(observer);
  }
}

public partial class Form2 : Form, IObserver
{
  public Form2()
  {
    InitializeComponent();
  }

  public void Update(object obj)
  {
    ListBox box = obj as ListBox;
    textBox1.Text = box.Text;
  }
}