Add custome footer in gridview with colspan properties in center

protected void grdPaymentDtls_RowCreated(object sender, GridViewRowEventArgs e)
    {
        if(e.Row.RowType.Equals(DataControlRowType.Footer))
        {
            //Build custom footer.
            GridView objGV = (GridView)sender;
            GridViewRow objGVRow = new GridViewRow(0, 0,
                    DataControlRowType.Footer, DataControlRowState.Insert);            

            //create instance of tablecell for gv
            TableCell objGVCell = new TableCell();

            //create instance of table/table row/table cell
            Table tb = new Table();
            TableRow tr = new TableRow();
            TableCell tc = new TableCell();

            //cell1
            tc.Text = "Total Count:";
            tc.CssClass = "label";
            tc.Width = Unit.Percentage(25);
            tc.Font.Bold = true;
            tr.Cells.Add(tc);

            //create label to add in cell2
            Label lblTotCount = new Label();
            lblTotCount.ID = "lblTotCount";
            lblTotCount.Text = "";

            //cell2
            tc = new TableCell();
            tc.Width = Unit.Percentage(25);
            tc.Controls.Add(lblTotCount);
            tr.Cells.Add(tc);

            //cell3
            tc = new TableCell();
            tc.Text = "Total Amount:";
            tc.CssClass = "label";
            tc.Font.Bold = true;
            tc.Width = Unit.Percentage(25);
            tr.Cells.Add(tc);

            //create label to add in cell4
            Label lblTotAmt = new Label();
            lblTotAmt.ID = "lblTotAmt";
            lblTotAmt.Text = "";

            //cell4
            tc = new TableCell();
            tc.Width = Unit.Percentage(25);
            tc.Controls.Add(lblTotAmt);
            tr.Cells.Add(tc);

            //add row in table
            tb.Rows.Add(tr);

            //set gv cell and add table in gv cell
            objGVCell.HorizontalAlign = HorizontalAlign.Center;
            objGVCell.ColumnSpan = objGV.Columns.Count;
            objGVCell.Controls.Add(tb);

            //add gv cell in gvrow and gvrow in gv
            objGVRow.Cells.Add(objGVCell);
            objGV.Controls[0].Controls.AddAt(objGV.Rows.Count + 1, objGVRow);
        }
    }