public void UpdateType_of_literature(Type_of_literatureModel t)
        {
            Type_of_literature tl = db.Type_of_literatures.GetItem(t.Type_of_literatureId);

            tl.Name_Type = t.Name_Type;
            tl.Book      = t.Book;
            Save();
        }
        public void DeleteType_of_literature(int id)
        {
            Type_of_literature t = db.Type_of_literatures.GetItem(id);

            if (t != null)
            {
                db.News.Delete(t.Type_of_literatureId);
                Save();
            }
        }
 public Type_of_literatureModel(Type_of_literature t)
 {
     Type_of_literatureId = t.Type_of_literatureId;
     Name_Type            = t.Name_Type;
     Book = t.Book;
 }