Question

My database table has the following:

ID   PollID Count
1    6      0    
2    6      1

Obviously doing a: SELECT SUM([COUNT]) WHERE POLLID = 6 would return 1

However, this LINQ code is returning 2.

long totalVoteCount = (from pa2 in df.PollAnswers
                       where pa2.Poll.ID == pollID
                      select pa.Count).Sum();

While writing this question, I noticed that the above LINQ code is returning incorrect data for other queries. What exactly am I doing wrong here? I want to SUM the COUNT column for a prticular POLLID.

Answer 1

You’re projecting pa.Count from your query instead of pa2.Count.

Therefore, if you have a pa variable in scope that refers to an object whose Count property is 1, and there are two items in df.PollAnswers, your query will indeed always return 2.