protected void gviewEmployees_RowDataBound(object sender, GridViewRowEventArgs e)

    {

        if (e.Row.RowType == DataControlRowType.DataRow)

        {

            e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor=\"\"");

            e.Row.Attributes.Add("onmouseover", "this.style.backgroundColor=\"#BFDFFF\"");

            TextBox txt = (TextBox)e.Row.Cells[3].FindControl("txtOrderNum");

            SumConsume += Convert.ToSingle(e.Row.Cells[2].Text.ToString().Substring(1)) * Convert.ToSingle(txt.Text);

        }

        if (e.Row.RowType == DataControlRowType.Footer)

        {

            e.Row.Cells[4].Text = "您的消费总额为：" + string.Format("{0:C}", Convert.ToDecimal(SumConsume.ToString()));

        }

    }