//获取所有班级 public static List <ClassList> getClassList() { imaw_qingjiaEntities db = new imaw_qingjiaEntities(); var classList = from t in db.T_Class select new { ID = t.ID, Name = t.ClassName }; List <ClassList> classes = new List <ClassList>(); foreach (var t in classList) { classes.Add(new ClassList(t.ID, t.Name)); } return(classes); }