i mean to say your page code.....
Aspx Page coding
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" Width="100%"
DataKeyNames="vchBrochureId" border="0" CellSpacing="1" CellPadding="2" AllowPaging="true"
PageSize="10">
<Columns>
<asp:TemplateField>
<EditItemTemplate>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
</EditItemTemplate>
<HeaderTemplate>
<input name="cbAll" value="cbAll" type="checkbox" onclick="SelectAll(cbAll,'GridView1','form1')" />
</HeaderTemplate>
<ItemStyle HorizontalAlign="Center" />
<ItemTemplate>
<asp:CheckBox ID="CheckBox1" runat="server" />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField HeaderText="Title" DataField="vchTitle">
<ItemStyle HorizontalAlign="Center" Width="60%" />
</asp:BoundField>
<asp:BoundField HeaderText="Date" DataField="dtmCreatedOn" DataFormatString="{0:dd-MMM-yyyy}"
HtmlEncode="False">
<ItemStyle HorizontalAlign="Center" />
</asp:BoundField>
<asp:TemplateField HeaderText="Edit">
<ItemTemplate>
<asp:ImageButton ID="ImageButton1" runat="server" ImageUrl="~/images/editicon.gif"
PostBackUrl='<%#"~/Admin/brochureAdd.aspx?Bid=" & Databinder.Eval(Container.DataItem,"vchBrochureId" ) %>' />
</ItemTemplate>
<ItemStyle HorizontalAlign="Center" />
</asp:TemplateField>
</Columns>
<HeaderStyle CssClass="tblHeader" />
<AlternatingRowStyle CssClass="tdData1" />
<PagerStyle HorizontalAlign="Right" />
</asp:GridView>