Question

I have a form and two custom UserControl that I made myself. one control has some buttons that each of these button have theire Tag property set to an array of PointF. I have another UserControl that has a ObservableCollection<PointF[]> that I set its event handler to draw the lines if data is being added to it. This works fine If I put the data points on its own class…just make to sure it works.

No my problem is, having this two control in one form, how can I set the click event of buttons in the first control, to add data points to the second control?

This two controls are both in two different projects in my soloution. and the form that these to controls are being showed in, is also in a different project (it is the launching project of soloution)

Answer 1

Add an event to the first control.

public event EventHandler<EventArgs> Control1ButtonClicked;
private void OnClicked()
{
    var handler = Control1ButtonClicked;
    if (handler != null)
    {
        handler(this, new EventArgs());
    }
}

private void Button1_Click(object sender, EventArgs e)
{
    OnClicked();     
}

Add a property to the second control

public ObservableCollection<PointF[]> MyPoints{ get; set;};

Then in your main application add a listener

userControl1.Control1ButtonClicked += new EventHandler<EventArgs>(userControl1_Control1ButtonClicked);

void userControl1_Control1ButtonClicked()
{
    //Do Something to control 2
    userControl2.MyPoints.Add() = //Whatever
}