Getting error:The entity or complex type cannot be constructed in a LINQ to Entities query

Question

I have created a viewmodel:-

public class viewdata : Tool.Models.Administration.User
    {
        public string Categories { get; set; }
        public int RegionID { get; set; }
        public string RegionName { get; set; }
    }

It was first created inside Controller..Then i changed its location to Tool.Models.Derived.viewdata..Then am getting error inside Lists Actionresult in controller

public ActionResult Lists(int? page)
            {
                var ListIFC = (from f in _db.Users                          
                               where f.IsActive == 1 && f.UserType == 2
                               select new viewdata
                               {
                                   UserName=f.UserName,
                                   FirstName = f.FirstName,
                                   UserID=f.UserID
                               });
                List<Tool.Models.Derived.viewdata> obj = (List<Tool.Models.Derived.viewdata>)ListIFC.ToList();
                int pageSize = 3;
                int pageNumber = (page ?? 1);

               return View(obj.ToPagedList(pageNumber, pageSize));     
            }   

Am getting an error like this...

The entity or complex type 'Tool.Models.viewdata' cannot be constructed in a LINQ to Entities query.

Answer 1

With your statement:

select new viewdata

You are trying to project your query result to your class viewdata which is deriving from Entity framework. You can't do that in LINQ to entities projection. Instead you may create a temporary class and project to that or project to anonymous type .