Question

I have a Linq to Entites query that needs to run only when ProgramId equals the parameter passed in by the URL:

var PatientFollowUpResult = surveyResponseRepository.Query.Count(r => r.PatientFollowUp);

For example, how do I count all of r.PatientFollowUp for r.ProgramId = 1?

Answer 1

If I understood correctly, you might have multiple hit based on the passed parameter and you are trying to get the total count for all these matches for a property on each?

In that case where and SelectMany would do the trick

var count = surveyResponseRepository.Query
                      .Where(r => r.ProgramId ==1)
                      .SelectMany(r=>r.PatientFollowUp).Count()