passing label templatefield value to vb.net function

Question

I have this gridview with a templateField like this

<asp:TemplateField HeaderText="Name">
    <ItemTemplate>
        <asp:Label ID="lblName" runat="server" Font-Size="10px" CssClass="ControlStyleUpperCase"  Text='<%# Bind("name") %>'></asp:Label>
    </ItemTemplate>
</asp:TemplateField>
 <asp:TemplateField HeaderText="Age">
    <ItemTemplate>
        <asp:Label ID="lblAge" runat="server" Font-Size="10px" CssClass="ControlStyleUpperCase"  Text='<%# Bind("age") %>'></asp:Label>
    </ItemTemplate>
</asp:TemplateField>   

and I have this html hyperlink that suppose to pass name and Age to both onServerClick function

<asp:TemplateField HeaderText="">
    <ItemTemplate>
    <a id="btn_Approve" onserverclick="Approve_Click" style="font-size:12px;color:Green;text-decoration: none;" runat="server" href='#'>Approve</a>     
    </ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="">
    <ItemTemplate>
     <a id="btn_Update" onserverclick="Update_Click" style="font-size:12px;text-decoration: none;" runat="server">Update</a>                                
    </ItemTemplate>
</asp:TemplateField>

can anyone guide me on how can I pass those labelId to code behind function

thanks.