How can I make a DateTimePicker display an empty string?

Question

I would like to be able to display a DateTimePicker that has a default value of nothing, i.e. no date.

For example, I have a start date dtTaskStar

Answer 1

Listen , Make Following changes in your code if you want to show empty datetimepicker and get null when no date is selected by user, else save date.

1. Set datetimepicker FORMAT property to custom.
2. set CUSTOM FORMAT property to empty string " ".
3. set its TAG to 0 by default.
4. Register Event for datetimepicker VALUECHANGED.

Now real work starts

if user will interact with datetimepicker its VALUECHANGED event will be called and there set its TAG property to 1.

Final Step

Now when saving, check if its TAG is zero, then save NULL date else if TAG is 1 then pick and save Datetime picker value.

It Works like a charm.

Now if you want its value be changed back to empty by user interaction, then add checkbox and show text "Clear" with this checkbox. if user wants to clear date, simply again set its CUSTOM FORMAT property to empty string " ", and set its TAG back to 0. Thats it..