Count the number of weekdays between two dates in visual basic

Question

I\'m a SQL guy, but I need a function to calculate the number of weekdays between two dates in VB.NET. I don\'t need to worry about holidays. My attempts unfortunately have

Answer 1

This may help someone else looking for this. This function doesn't loop day by day.

    public static double WorkDays(DateTime start, DateTime end)
    {
        var delta = end.AddDays(1) - start;
        var fullWeeks = (int)(delta.TotalDays / 7);
        var workDays = fullWeeks * 5;

        var partialWeekDays = delta.TotalDays % 7;
        if (partialWeekDays > 0)
        {
            var startWeekday = start.DayOfWeek;
            var endWeekday = end.DayOfWeek;

            if (startWeekday == DayOfWeek.Sunday || startWeekday == DayOfWeek.Saturday)
                partialWeekDays--;
            if (startWeekday > DayOfWeek.Sunday && startWeekday < DayOfWeek.Saturday &&
                startWeekday > endWeekday)
                partialWeekDays--;
            if ((endWeekday == DayOfWeek.Sunday || endWeekday == DayOfWeek.Saturday) && endWeekday != startWeekday)
                partialWeekDays--;
            if (endWeekday > DayOfWeek.Sunday && endWeekday < DayOfWeek.Saturday &&
                startWeekday > endWeekday)
                partialWeekDays--;
        }

        return workDays + partialWeekDays;
    }