How to select range of dates from list on providing searching criteria

Question

   DateInfo[] dateInfo= GetDateInfo();

   DateInfo[] searchDates  = null;
   DateTime dtfrom = DateTime.Parse(txtFromDate.Text);
   DateTime dtTo = DateTime.Parse(txtToDate.Text);
   searchDates = dateInfo.Where(p => p.AddDate >= dtfrom || p.AddDate < dtTo).ToArray<DateInfo>();

if list contain

11/17/13,11/18/13,11/19/13,11/19/13,11/19/13,11/20/13,11/20/13 

and I have entered

11/17/13 to 11/19/13 

it should return

11/17/13,11/18/13,11/19/13,11/19/13,11/19/13

Answer 1

Replace || with && :

searchDates = dateInfo.Where(p => p.AddDate >= dtfrom && p.AddDate <= dtTo)
                      .ToArray();

Answer 2

searchDates = dateInfo
   .Where(p => p.AddDate >= dtfrom && p.AddDate <= dtTo)
   .ToArray<DateInfo>();

AND in this case will force to filter dates that are between, while your condition will cover everything.

Answer 3

感谢您的回答。我的问题通过编写此查询得以解决

searchDates  = dateInfo.Where(p => (p.AddDate.Date.Year >= dtfrom.Date.Year && p.AddDate.Date.Month >= dtfrom.Date.Month && p.AddDate.Date.Day >= dtfrom.Date.Day) && (p.AddDate.Date.Year <= dtTo.Date.Year && p.AddDate.Date.Month <= dtTo.Date.Month && p.AddDate.Date.Day <= dtTo.Date.Day)).ToArray<DateInfo>();