Question

So I have a gridview with ‘dateborrowed’ and ‘datereturned’. What I want is that the program will count for the number of days in between the ‘dateborrowed’ and ‘datereturned’ like for example ‘dateborrowed’ = April 1, 2011 – ‘datereturned’ = April 30, 2011 = 29 days in between. Also I want the value to automatically insert to a record ‘daysibetween’. So how can I do that?

Help would be much appreciated. Thanks in advance!!

Answer 1

There are several ways you can accomplish this

A very much neat way

(a - b).TotalDays

taken from
Calculate difference between two dates (number of days)?

DateTime d1=DateTime.MinValue;
DateTime d2=DateTime.MaxValue;
TimeSpan span=d2-d1;
Console.WriteLine( "There're {0} days between {1} and {2}" , span.TotalDays, d1.ToString(), d2.ToString() );

OR

private int GetDaysBetweenDates(DateTime firstDate, DateTime secondDate)
{
   return secondDate.Subtract(firstDate).Days;
}

They were all taken from this thread in MSDN.

Once calculated, adding it to the database is an UPDATE query.