How to reference objects in one UserControl from code in a second control

Question

In one UserControl I have option buttons that are supposed to change the visibility of rectangles in another user control and I can't find out how to do this. Can anyone give me some code example for this?

Answer 1

The user control should raise an event that the second control use to change the visibility:

//FirstControl
public event EventHandler SelectionChanged;
private void OnOptionButtonSelectionChange(....)
{
  if (SelectionChanged != null)
    SelectionChanged(this, EventArgs.Empty);
}

//SecondControl
public void Setup()
{
  firstControlInstance.SelectionChanged += new EventHandler(manage_SelectionChanged);
}

private void manage_SelectionChanged(Object sender, EventArgs e)
{

}

Alternatively,if the controls are decoupled you could use a Mediator like this: http://sachabarber.net/?p=477