The DateTimeValue and DateTime functions are equivalent to CDateTime. However, DateTime can only be used in Crystal syntax since it is a type name in Basic syntax.
CDateTime (string) converts the given string to a DateTime value.
CDateTime (number) converts the given number to a DateTime value, where number holds the number of days since Dec. 30, 1899.
CDateTime (date) uses the given date to create the date portion, assigns 12:00:00 AM for the time portion for the returned DateTime value.
CDateTime (date, time) uses the given Date and Time data types to create a combined DateTime value.
CDateTime (YYYY, MM, DD) uses the given arguments to create the date portion, and assigns 12:00:00 AM for the time portion for the returned DateTime value.
CDateTime (YYYY, MM, DD, HH, MM, SS) uses the given arguments to create a combined DateTime value.
The following examples are applicable to both Basic and Crystal syntax:
CDateTime ("10/4/1999 10:20am")
Returns the DateTime value October 4, 1999 10:20:00 am
Returns the DateTime value January 11, 1900 12:00:00 pm
Returns the DateTime value December 27, 1899 12:00:00 pm
CDateTime (CDate ("Dec. 25, 1999"))
Returns the DateTime value December 25, 1999 12:00:00 am
CDateTime (CDate ("November 10, 1999"), CTime("12:20am"))
Returns the DateTime value November 10, 1999 12:20:00 am
CDateTime (1945, 8, 21, 0, 0, 0)
Returns the DateTime value August 21, 1945 12:00:00 am
CDateTime (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.
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