How can I increment a date?

Question

I have two dates as duedate as 03/03/2011 and returndate as 03/09/2011. I want to find the fine in double when I subtract duedate from returndate.How can duedate be incremented?

Answer 1

The logical solution would seem to be the AddDays method, as in the other answers.

However, I try (in general) never to use floating point (i.e. a double) when working with monetary or date values.

DateTime contains a time component and AddDays takes a double as argument (fractional part becomes time), so I tend to avoid use of that method.

Instead, I use

dueDatePlusOne = dueDate.AddTicks(TimeSpan.TicksPerDay);

This should result in slightly faster execution too. Not that it still matters much on today's hardware, but I started out coding for microprocessors with a <1 MHz clock speed and old PDP-8's and -11's and stuff like that back in the 1970's, and some habits never die ;)

Answer 2

Following code might help you:

var dueDate = new DateTime(2011, 3, 3);

//if you want to increment six days
var dueDatePlus6Days = dueDate.AddDays(6);

//if you want to increment six months
var dueDatePlus6Months = dueDate.AddMonths(6);

var daysDiff1 = (dueDatePlus6Days - dueDate).TotalDays; //gives 6
var daysDiff2 = (dueDatePlus6Months - dueDate).TotalDays; //gives 184