Question

I have two DateTime fields that I’d like to automatically fill so that the PeriodFrom field is set to 7 days ago and the PeriodTo field is set to today’s date.

At present I have them set up so that the PeriodFrom is set to the first day of the month with the following code:

  PeriodFrom = DateTime.Now.FirstDayOfMonth();
  PeriodTo = DateTime.Today;

where FirstDayOfMonth() is the extension method:

public static DateTime FirstDayOfMonth(this DateTime dateTime)
{
  return new DateTime(dateTime.Year, dateTime.Month, 1);
}

Is there a quick extension method that I could write to set the date to exactly 1 week ago?

Answer 1

public static DateTime OneWeekAgo(this DateTime dateTime)
{
  return dateTime.AddDays(-7);
}

Usage, as you already understand, like this:

PeriodFrom = DateTime.Now.OneWeekAgo();
PeriodTo = DateTime.Today;