public List <LiXinModels.CourseManage.Co_Course> GetListByTeacher(out int totalCount, int teacher, string where = " 1 = 1 ", int startIndex = 0, int pageLength = int.MaxValue, string orderBy = "ORDER BY Co_Course.id DESC") { return(_courseOrderDB.GetListByTeacher(out totalCount, teacher, where, startIndex, pageLength, orderBy)); }