displaying subtotal in gridview footer

trying the code below to display footer row for subtotal of the column 'Amount'.

unfortunately couldnt.
    background-color: #E4E0EE;
    color: White;
    text-align: right;

<asp:GridView ID="gvClaimSummary"  HeaderStyle-BackColor="#B8A9DC"
                  AlternatingRowStyle-BackColor="#E4E0EE" HeaderStyle-ForeColor="White" 
                         BorderColor="Black" BorderWidth="1px" Width="1105px"
                         RowStyle-VerticalAlign="Top" AllowPaging="true" PageSize="10"
                  AutoGenerateColumns="false" runat="server"  
                        onrowcommand="gvClaimSummary_RowCommand" onrowcreated="gvClaimSummary_RowCreated" 
                        <FooterStyle CssClass="FooterStyle" />

if (e.Row.RowType == DataControlRowType.DataRow)
            Label _lblcatefield = (Label)e.Row.Cells[5].FindControl("lblCateField");
            Label _lblidfield = (Label)e.Row.Cells[5].FindControl("lblID3Field");

            if (_lblcatefield.Text == "multiple" && !String.IsNullOrEmpty(_lblidfield.Text))
                //e.Row.Cells[1].ColumnSpan = 4;

                e.Row.Cells[1].ColumnSpan = 4;

                List<UserClaimDetails> list_ucd = new List<UserClaimDetails>();
                list_ucd = UserClaimDetails.getUserClaimDetail_ucsummaryid(Convert.ToInt32(_lblidfield.Text));

                if (list_ucd.Count > 0)
                    GridView _gv = (GridView)e.Row.FindControl("gvClaimSummaryMini");

                    if (_gv != null)
                        _gv.DataSource = list_ucd;

                    for (int i = 0; i < _gv.Rows.Count; i++)

                        Label _lblamount = (Label)_gv.Rows[i].Cells[3].FindControl("lblAmountField");

                        if (_lblamount.Text != String.Empty)
                            dgvminitotal += Convert.ToDecimal(_lblamount.Text);


        else if (e.Row.RowType == DataControlRowType.Footer)
            e.Row.Cells[2].Text = "SubTotal: ";
            e.Row.Cells[3].Text = dgvminitotal.ToString();

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what is the error you are getting?
Rajar AhmedConsultantCommented:
Total in footer . Easy to implement

doramail05Author Commented:
AliSyed :
nothing displayed on footer ,,

meeran03 :

i tried that artice, but does not give me the gridview footer row but only an additional amount on the right of each amount column.
Muhammad ZamanSoftware Development LeadCommented:

Please set gridview property showfooter="true" , It will solve your problem


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