Question

I’m developing a Windows Mobile 5.0 or above application with .Net Compact Framework 2.0 SP2 and C#.

I have a Winform (Form1) with a control (Control1) that contains another control (Control2). For example, a winform with a panel and inside this panel there is a button, but in my case Control1 and Control2 are custom controls.

Control2 has an event, Click, that is thrown when the user does click over it. This click event must be handled by Form1. To do it, first I handle the event on Control1 that throws a new event that is handled on Form1. This my code:

On Control1:

public event EventHandler Control2Click;

private void control2_Click(object sender, EventArgs e)
{
    if (Control2Click != null)
    {
        Control2Click(sender, e);
    }
}

On Form1:

private void control1_Control2Click(object sender, EventArgs e)
{
    // Do something interesting.
}

Is there a better way to handle Control2_Click directly in Form1? I don’t know if my way has a bad performance and this kind of events can be handled better.

Thank you!

Answer 1

No, you are doing it right. It is the correct way the bubble an event out of a nested control that isn’t directly accessible from a container control. You’d normally use the PerformClick() method to fire the Click event but this doesn’t appear to be available in CF.

Perf is not an issue, calling a delegate target is very fast, a dozen nanoseconds or so on a desktop machine. Click is a “human-time” event, anything less than 20 milliseconds is perceived as “instant”.