<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
                <ContentTemplate>
                    <div>
                        Data i czas:
                        <%= DateTime.Now.ToString() %>
                    </div>
                    <div>
                        <asp:Button ID="Button1" runat="server" Text="Aktualizuj" />
                    </div>
                </ContentTemplate>
                <Triggers>
                    <asp:AsyncPostBackTrigger ControlID="Button2" EventName="Click" />
                </Triggers>
             </asp:UpdatePanel>
             <hr />
             <asp:Button ID="Button2" runat="server" Text="Aktualizuj" />
