转载于 “编程论坛”
 int totalNumber, iNumber;
 double totalMoney, iMoney;
 protected void GRIDVIEW控件_RowDataBound(object sender, GridViewRowEventArgs e)
 {
    if (e.Row.RowType == DataControlRowType.DataRow || e.Row.RowType == DataControlRowType.EmptyDataRow)
        {
            DataRowView drvBasicCountInfor = (DataRowView)e.Row.DataItem;
            iMoney = Convert.ToDouble(drvBasicCountInfor[6]);//6是第5列的数字
            //生成总计
             totalNumber += iNumber;
             totalMoney += iMoney;
           }
           if (e.Row.RowType == DataControlRowType.Footer)  //页脚
            {
                e.Row.Cells[5].Text = "总计金额";
               e.Row.Cells[6].Text = string.Format("{0}", totalMoney);
            }
}
别忘了 GridView控件showfooter的属性=true呀