Determine the difference between two DateTimes, only counting opening hours

Question

For our support software in C#, I need to determine the time span between two DateTimes, but I only want opening hours counted (i.e. weekdays from 09:00 to 17:00).

S

Answer 1

You can try this Algorithm:

1. Calculate total No Of Hours (lets say TotalHours = (Date2 - Date1).TotalHours)
2. Calculate No of Holidays (holidays, includes weekends & other holidays)
3. Calcualte No of Working days ( (Date2-Date1).TotalDays - Holidays) as int

Working Hours = TotalHours - 24*holidays - 16*WorkingDays

(16 = Time difference between 5pm and 9am the next day)