While exporting repeater to excel ASP.NETC# getting HTML Tag

my asps file Customer.aspx

<asp:UpdatePanel runat="server" ID="updpnl">
<ContentTemplate>
<asp:Panel runat="server" ID="Panelmapdetail" Height="280px" ScrollBars="Auto">
<table class="table table-hover table-nomargin table-colored-header">
<thead>
<tr>
<th>UniqIDth>
<th>Customer Nameth>
<th>Product1th>
<th>Product2th>
<th>Product3th>
<th>th>
tr>
thead>
<tbody>
<asp:Repeater runat="server" ID="rptrStudMarksDetails">
<ItemTemplate>
<tr>
<td style="display:none"><asp:Label ID="lbCustomerProduct" runat="server" Text='<%#Eval("CustomerProduct") %>'>asp:Label>td>
<td><%#Eval("UniqID") %>td>
<td><%#Eval("Customer Name") %>td>
<td><%#Eval("Product1") %>td>
<td><%#Eval("Product2") %>td>
<td><%#Eval("Product2") %>td>
tr>
ItemTemplate>
asp:Repeater>
tbody>
table>
asp:Panel>
ContentTemplate>
asp:UpdatePanel>
<asp:LinkButton runat="server" ID="lbnExport" OnClick="lbnExport_Click">Export to Excelasp:LinkButton>

my aspx.cs file customer.aspx.cs

my output