Question

this is my code:

ViewBag.idprofesor = new SelectList(db.Profesor, "IDProfesor", "nombre");

this code generate a dropdown that only shows the name (nombre) of the teachers (profesor) in the database, id like the dropdown to show the name and the lastname of the teacher.

Answer 1

You may have to manually create a ist of SelectListItems that manually specify the fields you want. Like so:

List<SelectListItem> professors = new List<SelectListItem>();
foreach(var professor in db.Professors) {
    professors.Add( new SelectListItem() { Text = professor.Fn + " " +  professor.Ln, Value = professor.Id } );
}
ViewVag.Professors = professors;

Then in your view:

Html.DropDownListFor( m => m.Professor, ViewBag.Professors );