Learning Days C#

Question

How can i learn next wednesday, monday in a week? Forexample Today 06.02.2009 next Monday 09.02.2009 or wednesday 11.02.2009 there is any algorithm?

i need :

which day monday in comingweek?

findDay("Monday")

it must return 09.02.2009

=====================================================

findDay("Tuesday")

it must return 10.02.2009

Answer 1

Maybe this is a good place to start:

http://www.java2s.com/Tutorial/CSharp/0260__Date-Time/0020__DateTime.htm

Answer 2

DateTime now = DateTime.Now;
DateTime nextMonday = now.AddDays((int)now.DayOfWeek - (int)DayOfWeek.Monday);

Hum it seems that I answered too quickly. Actually there are more checking to do. Have a look at nobugz or peterchen answers.

Answer 3

public static DateTime GetNextDayDate(DayOfWeek day) {
  DateTime now = DateTime.Now;
  int dayDiff = (int)(now.DayOfWeek - day);
  if (dayDiff <= 0) dayDiff += 7;
  return now.AddDays(dayDiff);
}

Answer 4

Like Tyalis, but some extra checking is required:

int daysUntilMonday = ((int)DayOfWeek.Monday - (int)today.DayOfWeek;
if (daysUntilMonday <= 0) 
  daysUntilMonday += 7;

Monday = DateTime.Now.AddDays(daysUntilMonday);

Answer 5

Just iterate a bit:

DateTime baseDate = ...;
DayOfWeek requiredDayOfWeek = ...;

while(baseDate.DayOfWeek != requiredDayOfWeek)
    baseDate = baseDate.AddDays(1);

You can also write an extension method if those are available:

static Next(this DateTime date, DayOfWeek requiredDayOfWeek) { ... }

and you'll get pretty syntax: today.Next(DayOfWeek.Saturday).