public string GetCountScore() { float ds; float score = 0; DataTable dt = surBll.GetCountScore(Sid); for (int i = 0; i < dt.Rows.Count; i++) { score += Convert.ToInt32(dt.Rows[i]["AnswerScore"].ToString()); } ds = (score / (surBll.GetCount(Sid)) * 9) * 100; return(ds.ToString("0.00") + "%"); }