What's the best way to test for null in a CalendarCombo? | Infragistics Forums

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What's the best way to test for null in a CalendarCombo?

Dan posted over 15 years ago

I have AllowNull set to true, my user has deleted all text from the combo. Value == null returns false. What's the best way to test for null?

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Offline Brian Fallon posted over 15 years ago in reply to Dan

Yes, I tested it with the latest version of 2008.1 If you are seeing different behavior you should try the latest version and if the problem persists, report it as a bug
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Dan posted over 15 years ago in reply to Brian Fallon

Have you tested this? When the user blanks out the combo, testing for DBNull.Value returns false. When there is no text in the combo, Value.GetType() returns System.String. If there is a date selected, Value.GetType() returns DateTime. The datatype of the Value property is System.Object.

So, testing string.IsNullOrEmpty(calendarCombo1.Text) seems to be the best test, but it just seems a little strange. Is there a better test?
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Offline Brian Fallon posted over 15 years ago

UltraCalendarCombo.Value == DbNull.Value
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