GridView中利用Footer显示各科平均分数

 

 public void CountAverage()
    ...{
        double[] sum = new double[gvGrade.Rows[0].Cells.Count];
        gvGrade.FooterRow.Cells[1].Text = "平均分：";
        for (int i = 0; i < gvGrade.Rows.Count; i++)
        ...{
            for (int j = 4; j < sum.Length; j++)
            ...{
                string score = gvGrade.Rows[i].Cells[j].Text.Trim();
                if (!System.Text.RegularExpressions.Regex.IsMatch(score, @"^[0-9]+$"))
                    continue;

                sum[j] += double.Parse(score);
                gvGrade.FooterRow.Cells[j].Text = Convert.ToString(sum[j] / gvGrade.Rows.Count);
            }

        }
}