Data binding directly to a store query (DbSet, DbQuery, DbSqlQuery) is not supported

Question

Am coding on visual studio 2012 and using Entity Model as my Data layer. However, my drop down control with the Linq statement tend to thro

Answer 1

Or if you want to avoid writing a LINQ expression you could just do this:

var dbContext = new EF.CustomerEntities();
gvCustomers.DataSource = dbContext.CustomersTable.ToList();

Answer 2

The error is fairly clear - you can't bind directly to the query results, but need to populate some local collection instead.

The simplest way to do this is to convert it to a List<T>, via ToList():

 ddlCon.DataSource = (from em in dw.Employees
                             select new { em.Title, em.EmployeeID }).ToList();

Answer 3

though this question has already been answered still I want to show that you can even get the answer directly from the message box as well (i got the same error) ERROR DIALOGUE BOX IMAGE

using (var retrive=new Models.Academy_MSDBEntities())
        {
            var query = retrive.Students.Where(s => s.Year == year).ToList();
            return query;
        }