Crystal Reports for Rational Application Developer Designer Guide

DateTime

The CDateTime and DateTimeValue functions are equivalent to DateTime.

Creates a DateTime value from the information provided.

DateTime (date)
DateTime (number)
DateTime (string)
DateTime (date, time)
DateTime (YYYY, MM, DD)
DateTime (YYYY, MM, DD, HH, MM, SS)

date is a Date value.
number represents a number of days from December 30, 1899. For example, 20 represents 20 days from December 30, 1899, which is January 19, 1900.
string represents a date and time. For example, "September 15, 1999 10:45am".
date is a Date value; time is a Time value.
year is a whole number representing a calendar year; month is a whole number representing a month; day is a whole number representing a day of the month.
hour is a whole number representing an hour of the day; min is a whole number representing a minute; sec is a whole number representing seconds.

DateTime value.

Overload	Return value
DateTime (date)	Returns a DateTime value given a Date value, assigning 12:00:00 AM for the time portion for the returned DateTime value.
DateTime (date, time)	Returns a DateTime value given a Date and a Time value.
DateTime (number)	Returns a DateTime value given a number that specifies the number of days from December 30, 1899. Number can be positive or negative, and can be fractional.
DateTime (string)	Returns a DateTime value given a string that specifies a date and time; various formats of the string are supported.
DateTime (YYYY, MM, DD)	Returns a DateTime value given numeric arguments for the year, month and day. Assigns 12:00:00 AM for the time portion for the returned DateTime value.
DateTime (YYYY, MM, DD, HH, MM, SS)	Returns a DateTime value given numeric arguments for the year, month, day, hour, minute and second.

DateTime ("10/4/1999 10:20am")

Returns the DateTime value October 4, 1999 10:20:00 am.

DateTime (12.5)

Returns the DateTime value January 11, 1900 12:00:00 pm.

DateTime (-2.5)

Returns the DateTime value December 27, 1899, 12:00:00 pm.

DateTime (CDate ("Dec. 25, 1999"))

Returns the DateTime value December 25, 1999 12:00:00 am.

DateTime (CDate ("November 10, 1999"), CTime("12:20am"))

Returns the DateTime value November 10, 1999 12:20:00 am.

DateTime (1945, 8, 21, 0, 0, 0)

Returns the DateTime value August 21, 1945 12:00:00 am.

DateTime (1945, 8, 21, 10, 0, 0)

Returns the DateTime value August 21, 1945 10:00:00 am.

You can use the IsDateTime function to check if a String argument can be converted to a DateTime before doing the actual conversion. That way, if the conversion cannot be done, you can handle the situation appropriately.

DateTimeValue

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