datetime - Simple Age Calculator base on date of birth in C# -



datetime - Simple Age Calculator base on date of birth in C# -

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how calculate someone's age in c#? 54 answers

i have created simple age calculator. want remove decimal places problem when substract now bday.

example : input 2012, 10 , 23 , date 2014-10-22, when 2014.1022 - 2012.1023 result 1.9999... want remove decimal places , remain whole number 1, time utilize string.format("{0:00}" rounds off result 02even when utilize converttoint32, don't want utilize split string needs lot of code.

any ideas?

static void main(string[] args) { string year, month, day = string.empty; console.writeline("enter birthdate:"); console.writeline("year :"); year = console.readline(); console.writeline("month :"); month = console.readline(); console.writeline("day :" ); day = console.readline(); seek { datetime date = convert.todatetime(year + "-" + month + "-" + day); var bday = float.parse(date.tostring("yyyy.mmdd")); var = float.parse(datetime.now.tostring("yyyy.mmdd")); if (now < bday) { console.writeline("invalid input of date"); console.readline(); } console.writeline("your age " + (string.format("{0:00}", (now - bday)))); //it rounds off float console.readline(); } grab (exception ex) { console.writeline(ex.tostring()); console.readline(); } }

}

contrary comments, timespan not help here, because year not fixed length of time. in turn leads expressed aim beingness unusual indeed. shouldn't representing date fractional number first 2 digits beingness months , 3rd , 4th digits beingness days. time doesn't work that. (consider difference between 2014.0131 , 2014.0201 much greater difference between 2014.0130 , 2014.0131, example.)

it improve represent age in terms of years, months , days. noda time library makes pretty simple:

localdate birthday = new localdate(1976, 6, 19); // illustration localdate today = localdatetime.fromdatetime(datetime.now).date; // see below period period = period.between(birthday, today); console.writeline("you {0} years, {1} months, {2} days old", period.years, period.months, period.days);

if want determine number of years, decide utilize period.years, or perchance round result based on period.months well.

i recommend against using datetime.now in production code, however. in noda time, have iclock interface representing "a means of getting current instant in time", systemclock implementation in main assembly , fakeclock implementation in testing assembly. code take iclock (possibly dependency injection) , utilize determine current date in whatever time zone you're interested in. way, can write tests situation like, without changing computer's clock. way of handling time-related tasks in general, imo.

c# datetime decimal calculator

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