How to add Data-Type in ASP:GridView Header in vb.net?

I have ASP:GridView. I want to add Data-Type="Product" in header and cell.

<asp:GridView ID="GridView1" HeaderStyle-BackColor="#3AC0F2" HeaderStyle-ForeColor="White"
    runat="server" AutoGenerateColumns="false">
    <Columns>
        <asp:BoundField DataField="Id" HeaderText="Id" ItemStyle-Width="30" />
        <asp:BoundField DataField="Name" HeaderText="Name" ItemStyle-Width="150" />
        <asp:BoundField DataField="Country" HeaderText="Country" ItemStyle-Width="150" />
    </Columns>
</asp:GridView>

I want to add Data-Type same as we can add in 'th'.

Ex. <th align="left" scope="col" data-type="product">Name</th>

Can anybody suggest me?