Gridview 尾部添加总计

    int totalZJ, iZJ;
    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowIndex != -1)
        {
            Label labId = (Label)e.Row.FindControl("labId");
            labId.Text = (e.Row.RowIndex + 1 + AspNetPager1.PageSize * (AspNetPager1.CurrentPageIndex - 1)).ToString();
        }
        if (e.Row.RowType == DataControlRowType.DataRow || e.Row.RowType == DataControlRowType.EmptyDataRow)
        {
            DataRowView drvBasicCountInfor = (DataRowView)e.Row.DataItem;
            iZJ = Convert.ToInt32(drvBasicCountInfor[2]); 
            //生成总计 
            totalZJ += iZJ;
        }
        if (e.Row.RowType == DataControlRowType.Footer)  //页脚 
        {
            e.Row.Cells[3].Text = "学分总计：";  
            e.Row.Cells[3].Style.Add("text-align", "right"); 
            e.Row.Cells[4].Text = string.Format("{0}", totalZJ);
            e.Row.Cells[4].Style.Add("text-align", "center");
        }

    }