Show Total in GridView Footer

Design:

<asp:TemplateField HeaderText="Total Pcs">

 <ItemTemplate>

          <asp:Label ID="lbltotpcs" runat="server"  Text='<%# Bind("totpcs") %>'></asp:Label>

 </ItemTemplate>

 <FooterTemplate>

        Total : <asp:Label ID="lbltotqty" runat="server" Text="Label"></asp:Label>

</FooterTemplate>

</asp:TemplateField>

Populate the RowDataBound event of Gridview where you have to do the main calculation.

int totqty=0;

protected void gvCrate_RowDataBound(object sender, GridViewRowEventArgs e)

    {

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

        {

            Label totpcs = (Label)e.Row.FindControl("lbltotpcs");

            totqty = totqty + (Convert.ToInt32(totpcs.Text));

        }

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

        {

            ((Label)e.Row.FindControl("lbltotqty")).Text = totqty.ToString();

            TxtTotalpcs.Value = totqty.ToString();

        }

    }

NOTE:

Enable  "ShowFooter" as True in Gridview's property.