public void LoadMarks() { BLLGradeBook objbll = new BLLGradeBook(); objbll.Rollno = user; List <BLLGradeBook> objlist = new List <BLLGradeBook>(); objlist = objbll.Selectmarksbycourseforstu(objbll); if (objlist.Count > 0) { dgquiz.DataSource = objlist; dgquiz.DataBind(); } }