AJAX刷新页面怎么保存结果？
最近刚开始玩JQuery还有ASP.net AJAX，尝试做一个条件查询的功能。
特效和局部刷新完成了，基本结构就是一个updatePanel里包含一个Listbox，然后点击里面的选项作为查询条件，但是问题出来了，发现ViewState不能使用，问下大家，碰到这种问题是怎么处理的？怎么获取值然后进行查询？

<asp:UpdatePanel ID="UpdatePanel1" runat="server">

                                        <ContentTemplate>

                                            <asp:ListBox ID="RootLB" runat="server" AutoPostBack="True" Height="200px" OnSelectedIndexChanged="RootLB_SelectedIndexChanged"

                                                Width="195px"></asp:ListBox>

                                        </ContentTemplate>

                                    </asp:UpdatePanel>



<asp:UpdatePanel ID="UpdatePanel2" runat="server" UpdateMode="Conditional">

                                        <ContentTemplate>

                                            <asp:ListBox ID="ChildLB" runat="server" AutoPostBack="True" Height="200px" OnSelectedIndexChanged="ChildLB_SelectedIndexChanged"

                                                Width="195px"></asp:ListBox>

                                        </ContentTemplate>

                                        <Triggers>

                                            <asp:AsyncPostBackTrigger ControlID="RootLB" EventName="SelectedIndexChanged" />

       &