Calculate the number of business days between two dates?

Question

In C#, how can I calculate the number of business (or weekdays) days between two dates?

Answer 1

You just have to iterate through each day in the time range and subtract a day from the counter if its a Saturday or a Sunday.

    private float SubtractWeekend(DateTime start, DateTime end) {
        float totaldays = (end.Date - start.Date).Days;
        var iterationVal = totalDays;
        for (int i = 0; i <= iterationVal; i++) {
            int dayVal = (int)start.Date.AddDays(i).DayOfWeek;
            if(dayVal == 6 || dayVal == 0) {
                // saturday or sunday
                totalDays--;
            }
        }
        return totalDays;
    }