Ext.net：再次在usercontrol中再次加载TreeviewStore

Question

我有一个主页面并像这样加载我的treepanel。（它没有问题加载）

  TreeStore1.DataSource = FillTree.TreeDoldur();
                TreeStore1.DataBind();

这是用户控制器， 添加数据后，我再次绑定treewiewstore

   Ext.Net.TreeStore tw = (Ext.Net.TreeStore)Page.FindControl("TreeStore1");
            tw.DataSource = FillTree.TreeDoldur();
            tw.DataBind();

但是看来Treepanel会再次使用新值填充。如何解决这个问题。 （主页内的M treepanle）

这是标记

            <ext:TreePanel ID="TreePanel1" runat="server" Title="TreePanel" Width="300" Height="200"
                                Margin="10" RootVisible="false" Lines="false" UseArrows="false" Region="West">
                                <TopBar>
                                    <ext:Toolbar ID="Toolbar2" runat="server">
                                        <Items>
                                            <ext:ToolbarTextItem ID="ToolbarTextItem1" runat="server" Text="Filter:" />
                                            <ext:ToolbarSpacer />
                                            <ext:TriggerField ID="TriggerField1" runat="server" AutoFocus="true" EnableKeyEvents="true">
                                                <Triggers>
                                                    <ext:FieldTrigger Icon="Clear" />
                                                </Triggers>
                                                <Listeners>
                                                    <KeyUp Fn="filterTree" Buffer="250" />
                                                    <TriggerClick Handler="clearFilter();" />
                                                </Listeners>
                                            </ext:TriggerField>
                                        </Items>
                                    </ext:Toolbar>
                                </TopBar>
                                <Store>
                                    <ext:TreeStore ID="TreeStore1" runat="server">
                                        <Root>
                                            <ext:Node Expanded="true">
                                            </ext:Node>
                                        </Root>
                                    </ext:TreeStore>
                                </Store>


                                <DirectEvents>
                                <ItemClick OnEvent="Hello">
                                <ExtraParams>
                                <ext:Parameter Name="Id" Value="record.data.id" Mode="Raw"></ext:Parameter>
                                </ExtraParams>
                                </ItemClick>
                                </DirectEvents>
                             <%--   <Listeners>
                                    <ItemClick Handler="App.direct.Hello(record.data.id);" />
                                </Listeners>--%>
                            </ext:TreePanel>