Question

This code builds without problems but fails when executed:

var query =
    _db.STEWARDSHIP
        .OrderByDescending(r => r.VisitDate)
        .Where(r => SiteId == null || r.SiteAssoc.Id == iSiteId)
        .Where(r => r.MarkedForDeletion == false)
        .Select(r => new SearchResults(r.Id, 
                                       r.SiteAssoc.Name, 
                                       r.VisitDate, 
                                       r.VisitTypeValAssoc.Description));

The error message is:

Only parameterless constructors and initializers are supported in LINQ to Entities.

What am I doing wrong here? I must pass info to the constructor to build the SearchResults objects. Is there a way to do this or do I have to make this a 2-step thing where I get the results and then iterate over the results to create the new objects?

UPDATE:

Changing the select to this fixes the issue:

 .Select(r => new SearchResults(){Id = r.Id, 
                                 Name = r.SiteAssoc.Name, 
                                 VisitDate = r.VisitDate, 
                                 VisitType = r.VisitTypeValAssoc.Description});

Answer 1

Try this

 .OrderByDescending(r => r.VisitDate)
        .Where(r => SiteId == null || r.SiteAssoc.Id == iSiteId)
        .Where(r => r.MarkedForDeletion == false)
        .Select(r => new SearchResults()
                                       {
                                       ID = Ir.Id, 
                                       Name = r.SiteAssoc.Name, 
                                       VisitDate = r.VisitDate, 
                                       Description = r.VisitTypeValAssoc.Description
                                       });