View Source not showing gridview control

<asp:GridView ID="GvAllInvoice" runat="server" Width="100%" PageSize="10" AutoGenerateColumns="False"
ShowFooter="True" AllowSorting="true" OnRowDataBound="GvAllInvoice_RowDataBound" OnPageIndexChanging="GvAllInvoice_PageIndexChanging" OnSorting="GvAllInvoice_Sorting">
<HeaderStyle BackColor="#4E4402" ForeColor="#F7F7F7" HorizontalAlign="Center"></HeaderStyle>
<rowstyle cssclass="GridItem">
<alternatingrowstyle cssclass="GridAltItem">
<footerstyle forecolor="Black" backcolor="#CCCCCC" height="20px">
<columns>
<asp:TemplateField Visible="False" HeaderText="InvID" ItemStyle-Height="20px">
<HeaderStyle Width="0px"></HeaderStyle>
<itemtemplate>
<asp:Label runat="server" Width="0px" Text='<%# DataBinder.Eval(Container, "DataItem.Invoice_ID") %>'
ID="lblinvid">


<itemstyle height="20px">

<asp:TemplateField HeaderText="Invoice No." FooterText="Total" ItemStyle-Height="20px"
SortExpression="invoiceno">
<HeaderStyle Font-Bold="True" ForeColor="White" Width="30%"></HeaderStyle>
<HeaderTemplate>
<asp:Label ID="lblheaderText" runat="server" Text="Invoice NO." Font-Bold="True">
</HeaderTemplate>
<itemtemplate>
<asp:CheckBox ID="chkinv" runat="server">
<asp:Label runat="server" Text='<%# DataBinder.Eval(Container, "DataItem.invoiceno") %>'
ID="lblInvNo">

<input type="hidden" runat="server" value='<%# DataBinder.Eval(Container, "DataItem.TDSRATE") %>'
id="hdTds" />

<itemstyle height="20px">
<footerstyle height="20px">

<asp:TemplateField HeaderText="Balance" ItemStyle-Height="20px" SortExpression="BalanceInvoiceAmt">
<HeaderStyle Font-Bold="True" ForeColor="White" Width="20%"></HeaderStyle>
<itemtemplate>