Mega Code Archive
Replacedate - change only the date part of a tdatetime variable sysutils unit
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procedure ReplaceDate ( var DateTimeVar : TDateTime; const NewDateValue : TDateTime ) ;
Description
The ReplaceDate function updates the date part of a TDateTime variable DateTimeVar with the date part of another TDateTime value NewDateValue without affecting the time.
Related commands
DecodeDate Extracts the year, month, day values from a TDateTime var.
DecodeDateTime Breaks a TDateTime variable into its date/time parts
DecodeTime Break a TDateTime value into individual time values
EncodeDate Build a TDateTime value from year, month and day values
EncodeDateTime Build a TDateTime value from day and time values
EncodeTime Build a TDateTime value from hour, min, sec and msec values
RecodeDate Change only the date part of a TDateTime variable
RecodeTime Change only the time part of a TDateTime variable
ReplaceTime Change only the time part of a TDateTime variable
Example code : Change the date without changing the time
var
myDateTime, newDate : TDateTime;
begin
// Set the date to 29/10/2002 at 12:34:56
myDateTime := EncodeDateTime(2002, 10, 29, 12, 34, 56, 0);
ShowMessage('The starting date/time = '+DateTimeToStr(myDateTime));
// Now change the date portion without touching the time
newDate := EncodeDate(1957, 02, 18);
ReplaceDate(myDateTime, newDate);
ShowMessage('The new date/time = '+DateTimeToStr(myDateTime));
end;
Show full unit code
The starting date/time = 29/10/2002 12:34:56
The new date/time = 18/02/1957 12:34:56
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