Is there any easy way to increment a DateTime by monthly/yearly/daily units without having to parse it out like crazy?

I need to set up billing cycles and process payments. So for example I will process a payment immediately and then set the next one up to process exactly one month from then.

So if I get DateTime.Now is there any quick way to just add a month to it? how about a year? Or will I need to parse it out into MM, YYYY, DD, and then add to MM, if MM == 12 increment year, etc… then piece it back together for my string to submit to this paypal plugin?

Here is the final format needed:

"YYYY-MM-DDTHH:MM:SS.MSZ".

This is explained in more detail below:




YYYY Four-digit year, e.g. "2005" 
MM  Two-digit month. 
DD Two-digit day. 
T Indicates time follows the date. 
HH Hours in military time (24-hour format). 
MM  Minutes 
SS Seconds 
MS Milliseconds 
Z 1-character (US military) representation of the time zone, "A" - "M" are negative offsets -1 to -12, with "J" not being used. "N" - "Y" are positive offsets 1 to 12, and "Z" indicates GMT/UTC (no offset).  


For instance, "2004-05-26T15:00:00.00Z" is May 26th, 2004 at 3:00pm GMT.

So basically I am wondering if there are any easy built in ways to add one month or one year to a date without parsing the crap out of it as a string.

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Answers:

Method 1

Method 2

Method 3

Method 4

Answers:

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Method 1

Try this:

DateTime myDateTime = DateTime.Now.AddMonths(1);

Method 2

DateTime has a set of Add methods such as:

AddYears
AddMonths
AddDays
AddHours
AddMonths

etc.

More information at DateTime methods.

Method 3

The aptly-named “AddMonths” method comes immediately to mind.

Method 4

If you ever need to work with Quarter or WeekOfYear, Microsoft.VisualBasic.DateAndTime.

http://msdn.microsoft.com/en-us/library/microsoft.visualbasic.dateandtime_members.aspx

Otherwise, System.DateTime does everything you would typically need.

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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