RowDataBound Event of GridView and take footer sum value in asp.net with C#

We are using RowDataBound event to perform summation in footer row.
we will show you how to display a summary or the sum of values in a particular column, in the GridView footer row. Also known as running total of a column, these accumulated figures needs to be displayed below all the pages, if GridView Paging is set as “True”.

protected void gv_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        try
        {
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
                TotalsCnt += Convert.ToInt32((DataBinder.Eval(e.Row.DataItem, "DataBaseValue")));
                TotaloCnt += Convert.ToInt32((DataBinder.Eval(e.Row.DataItem, "DataBaseValue")));
                TotalcCnt += Convert.ToInt32((DataBinder.Eval(e.Row.DataItem, "DataBaseValue")));
                TotalSaCnt += Convert.ToInt32((DataBinder.Eval(e.Row.DataItem, "DataBaseValue")));
                TotalAmt += Convert.ToInt32((DataBinder.Eval(e.Row.DataItem, "DataBaseValue")));
                TotalCAmt += Convert.ToInt32((DataBinder.Eval(e.Row.DataItem, "DataBaseValue")));
                TotalPAmt += Convert.ToInt32((DataBinder.Eval(e.Row.DataItem, "DataBaseValue")));
                TotalAfAmt += Convert.ToInt32((DataBinder.Eval(e.Row.DataItem, "DataBaseValue")));
            }
            if (e.Row.RowType == DataControlRowType.Footer)
            {
                e.Row.Cells[2].Text = string.Format("{0:N0}", TotalsentCnt);
                e.Row.Cells[3].Text = string.Format("{0:N0}", TotalopenCnt);
                e.Row.Cells[4].Text = string.Format("{0:N0}", TotalclickCnt);
                e.Row.Cells[5].Text = string.Format("{0:N0}", TotalSalesCnt);
                e.Row.Cells[6].Text = string.Format("{0:C2}", TotalAmt);
                e.Row.Cells[7].Text = string.Format("{0:C2}", TotalCustomerAmt);
                e.Row.Cells[8].Text = string.Format("{0:C2}", TotalPublisherAmt);
                e.Row.Cells[9].Text = string.Format("{0:C2}", TotalAffiliateAmt);
            }
        }
        catch (Exception ex)
        {

            throw ex;
        }
    }