How to implement read more functionality in Repeater button click using C# and VB.Net in ASP.Net

Hello Dear Sirs ,

Please, I have a question about How to make edit button column div

visible/invisible dynamically in updatepanel Like (Read More)?

This is because I have a lot of data and do not want to view it at once on the page .  Also I do not want to use the page numbering system .

Example code :

<asp:UpdatePanel runat="server" id="UpdatePanel1" updatemode="Conditional"> 
                      
                               <ContentTemplate>
 <ItemTemplate>

<div class="content">

 <div class="items">

<span style="margin-right: 3px;"> <asp:Label ID="Label1" runat="server" ><%# ProcessMyDataItem(Eval("Course"))%></asp:Label></span>
                         <span style="margin-right: 3px;">  <asp:Label ID="Label2" runat="server" ><%# ProcessMyDataItem2(Eval("Book"))%></asp:Label></span>
                         <span style="margin-right: 3px;">  <asp:Label ID="Label3" runat="server"><%# ProcessMyDataItem3(Eval("Training"))%></asp:Label></span>
                         <span style="margin-right: 3px;">  <asp:Label ID="Label4" runat="server" ><%# ProcessMyDataItem4(Eval("Program"))%></asp:Label></span>
                         

</div>

</div>

 </ItemTemplate>

    </ContentTemplate>


<Triggers>

</Triggers>

</asp:UpdatePanel>

THANK YOU VERY MUCH,

Noor Ahmed,