ASP.NET Update Panel

Butona Tıklandığında Açılan Panel

WebForm Ekranı
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
    <asp:UpdatePanel ID="updatePanel2" runat="server" UpdateMode="Conditional" ChildrenAsTriggers="false">
    <ContentTemplate>
  
         <asp:Button ID="Button1" runat="server" Text="Button" data-toggle="modal"  data-target="#myModal" OnClick="Button1_Click2" />
    </ContentTemplate>
    <Triggers>
        <asp:AsyncPostBackTrigger ControlID="Button1" /> 
    </Triggers>
</asp:UpdatePanel>


 <div class="modal fade" id="myModal" role="dialog">
    <div class="modal-dialog">
    
      <!-- Modal content-->
      <div class="modal-content">
        <div class="modal-header">
          <button type="button" class="close" data-dismiss="modal">&times;</button>
          <h4 class="modal-title">Modal Başlığı</h4>
        </div>
        <div class="modal-body">
          <p>asdasdasdasdasdasd.</p>
        </div>
        <div class="modal-footer">
          <button type="button" class="btn btn-default" data-dismiss="modal">Kapat</button>
        </div>
      </div>
      
    </div>
  </div>