how to use linq query for comparing two fields in a list

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Hi all

I had a list contains holidayname and date.Only one holiday can be specified on a day
I had done this in for loop

for (int i = 0; i < holidaylist.Count; i++)
          {
              for (int j = i + 1; j < _holidayviews.Count; j++)
                  {
                      if (holidaylist[i].Date == holidaylist[j].Date)
                      {
                          throw new Exception("Holiday Date cannot be same");
                      }
                  }

it is working but i need to use linq query..
can any help me to get out of this problem..

Posted 11-Jul-12 20:08pm

kevin_ze

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Shmuel Zang · Accepted Answer · 2012-07-11T20:30:00

Solution 1

It can be something like:

C#

if (holidaylist.Select(h => h.Date).Distinct().Count() != holidaylist.Count)
{
    throw new Exception("Holiday Date cannot be same");
}

Posted 11-Jul-12 20:30pm

Shmuel Zang

Updated 11-Jul-12 20:31pm

v2

Comments

kevin_ze 12-Jul-12 2:49am

Thanks a lot Shmuel Zang its working Fine but am not able to understand the flow of that code can u explain that if u wish to

Shmuel Zang 12-Jul-12 2:59am

We made a collection of dates. Then, we used the Distinct method to remove duplicates. Then, we compared the count of the created collection with the count of the original collection (holidaylist).

kevin_ze 12-Jul-12 3:03am

Thank u very much.