GridView加自动编号列

<asp:GridView ID="GridView1" runat="server"
 AutoGenerateColumns="False" SortAscImageUrl="..\Images\arrow-up.gif" SortDescImageUrl="..\Images\arrow-down.gif"   DataKeyNames="Title" UpdateAfterCallBack="True" Width="99%" BackColor="#E8E8E8" BorderColor="#B9B9B9"  AddSequenceColumn="False" BorderStyle="Solid" BorderWidth="1px" CellPadding="0" DeletePromptText="确实要删除指定的记录吗？" FixHeader="False"  Del="False" Edit="False" EnableCallBack="False" PageSize="19" AllowMultiColumnSorting="False"  GridViewSortDirection="Ascending" >
                        <Columns>
                            <asp:TemplateField HeaderText="序号" InsertVisible="False" >
                                 <headerstyle width="7%" horizontalalign="Center" />
                                 <ItemTemplate>
                                    <asp:Label id="Label2" runat="server" Width="100%" Text="<%# this.GridView1.PageIndex * this.GridView1.PageSize  + this.GridView1.Rows.Count + 1 %>" ForeColor="Red"></asp:Label>
                                 </ItemTemplate>
                            </asp:TemplateField>
                           
                            <asp:BoundField DataField="Title" HeaderText="标题" SortExpression="Title">
                            <headerstyle width="12%" horizontalalign="Center" />
                                <ItemStyle HorizontalAlign="Center" />
                            </asp:BoundField>
                            <asp:BoundField DataField="CreateDate" HeaderText="创建时间" SortExpression="CreateDate" DataFormatString="{0:yyyy-MM-dd}" HtmlEncode="False">
                            <headerstyle width="11%" horizontalalign="Center" />
                                <ItemStyle HorizontalAlign="Center" />
                            </asp:BoundField>
                            <asp:BoundField DataField="HitCount" HeaderText="内容" SortExpression="HitCount">
                            <headerstyle width="20%" horizontalalign="Center" />
                                <ItemStyle HorizontalAlign="Center" />
                            </asp:BoundField>
                           
                          
                        </Columns>
                    <PagerStyle BackColor="Gainsboro" BorderStyle="Dotted" ForeColor="#4A3C8C" HorizontalAlign="Right" />
                        <HeaderStyle BackColor="#A8B8D8" HorizontalAlign="Left" Height="22px" Font-Bold="True" />
                        <SelectedRowStyle BackColor="#E8E8E8" />
                        <AlternatingRowStyle BackColor="#E0E0E8" />
                   
                    </asp:GridView>