C# - Duration between two DateTimes in minutes

Question

I need to determine duration between two DateTimes in minutes.

However, there is a slight twist:

• exclude weekends
• only count minutes which a

Answer 1

It was a pretty hard question. For a basic, in a straightforward approach, I have written the below code:

DateTime start = new DateTime(2010, 01, 01, 21, 00, 00);
DateTime end = new DateTime(2010, 10, 01, 14, 00, 00);

// Shift start date's hour to 7 and same for end date
// These will be added after doing calculation:
double startAdjustmentMinutes = (start - start.Date.AddHours(7)).TotalMinutes;
double endAdjustmentMinutes = (end - end.Date.AddHours(7)).TotalMinutes;

// We can do some basic
// mathematical calculation to find weekdays count:
// divide by 7 multiply by 5 gives complete weeks weekdays
// and adding remainder gives the all weekdays:
int weekdaysCount = (((int)((end.Date - start.Date).Days / 7) * 5) 
          + ((end.Date - start.Date).Days % 7));
// so we can multiply it by minutes between 7am to 7 pm
int minutes = weekdaysCount * (12 * 60);

// after adding adjustment we have the result:
int result = minutes + startAdjustmentMinutes + endAdjustmentMinutes;

I know this not seem programmatically beautiful but I don't know if it is good to iterate through days and hours between start and end.