Question on DateTimePicker

[priyamtheone]

In C# 2005 how can i trap the checked/unchecked state of a datetimepicker through an event. I'm trying to execute two different methods based on the checked/unchecked state of a datetimepicker when the user clicks the datetimepicker. When the user checks the dtPicker Method A is executed, when the user unchecks it Method B is executed. How can i trap it.
Regards.

[tlhintoq]

I was expecting to give an obvious answer like "Use the CheckChanged event". After all one would expect that if it has a checkbox and a Checked property in it that it would have a CheckChanged event, right? Nope. Thanks for the oversight Microsoft.

So then I figured, 'well it has to raise some event: The font color is changing as if it is enabled/disabled.' So I put in simple methods for various events like EnableChanged, FontChanged and so on. Nope.

The only thing I could come up with was reacting to the MouseUp event.

        private void dateTimePicker1_MouseUp(object sender, MouseEventArgs e)
        {
            if (((DateTimePicker)sender).Checked)
            {
                Console.WriteLine("Is checked");
            }
            else
            {
                Console.WriteLine("NOT checked");
            }
        }

You could add a bool for "WasChecked ", then compare the current status to the previous status. If they don't match, then there was a change. If they do match, then the user clicked some other area of the DTP control.

If you are going to use this control often and want that as a true event, you might want to make your own DTP control inherited from this one where you raise an event for the CheckChanged.

If anyone else knows a more elegant solution, let's here it.