refactor code using reflection

I am struggling on refactoring this (working) code:

MyDbContext db = new MyDbContext();

 List<SelectListItem> selectedItems = new List<SelectListItem>();
 if (type == null) return selectedItems;

if (type == typeof(class1))
             selectedItems = db.class1.ToList().Select(ii => new SelectListItem { Text = ii.Name, Value = ii.Id.ToString() }).OrderBy(si => si.Text).ToList();

if (type == typeof(class2))
             selectedItems = db.class2.ToList().Select(ii => new SelectListItem { Text = ii.Name, Value = ii.Id.ToString() }).ToList();

if (type == typeof(class3))
            selectedItems = db.class3.ToList().Select(ii => new SelectListItem { Text = ii.Name, Value = ii.Id.ToString() }).ToList();

if (type == typeof(class4))
            selectedItems = db.class4.ToList().Select(ii => new SelectListItem { Text = ii.Name, Value = ii.Id.ToString() }).ToList();

This code is inside an ASP.NET MVC controller. Class1 to Class 4 are Model classes.

SelectListItem is just a ModelView class I use to grab an Id and a Name from a Class1, 2, 3 or 4 object. I don't think it s worth posting its code. So below code just extracts all occurrences of Class1 or2 or 3 or 4 and converts them into options that will be passed to a View (for a DropDownBox). I only know the exact Model type at runtime of course (Class1...or 4).

I use Entity Framework with such a DbContext:

  public partial class MyDbContext: DbContext
    {
...

        public virtual DbSet<Class1> Class1{ get; set; }
        public virtual DbSet<Class2> Class2{ get; set; }
        public virtual DbSet<Class3> Class3{ get; set; }
        public virtual DbSet<Class4> Class4{ get; set; }
...
    }

I am pretty sure I can end up with a clean code with reflection instead of this horrible thing I wrote. But I did not manage to get anything clean that compiles.

Thx for your help.