I want to put reportviewer on panel content, have a treepanel control, click node, can change the reportviewer reportpath. But can't userful in server side, can't change the reportviewer reportpath, how to do?
Examples are as follows:



<body>
    <form runat="server">
    <%--  <ajax:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server" EnablePartialRendering="true">
    </ajax:ToolkitScriptManager>--%>
    <ext:ResourceManager ID="ResourceManager1" runat="server" />
    <asp:ScriptManager ID="scriptManager" runat="server" EnablePartialRendering="true">
    </asp:ScriptManager>
    <ext:Viewport ID="Viewport1" runat="server" Layout="border">
        <Items>
            <ext:ColumnLayout ID="ColumnLayout1" runat="server" Split="true">
                <Columns>
                    <ext:LayoutColumn ColumnWidth="0.2">
                        <ext:Panel ID="Panel2" runat="server" Region="West" Width="200" Header="false" Collapsible="true"
                            Split="true" CollapseMode="Mini" Margins="0 0 4 4" Layout="Fit">
                            <Items>
                                <ext:TreePanel ID="reportTree" runat="server" Header="false" AutoScroll="true" Lines="false"
                                    UseArrows="true" CollapseFirst="false" ContainerScroll="true" RootVisible="false">
                                    <TopBar>
                                        <ext:Toolbar ID="Toolbar1" runat="server">
                                            <Items>
                                                <ext:TriggerField ID="TriggerField1" runat="server" EnableKeyEvents="true" Width="150"
                                                    EmptyText="过滤报表...">
                                                    <Triggers>
                                                        <ext:FieldTrigger Icon="Clear" HideTrigger="true" />
                                                    </Triggers>
                                                    <Listeners>
                                                        <KeyUp Fn="filterTree" Buffer="100" />
                                                        <TriggerClick Fn="clearFilter" />
                                                        <SpecialKey Fn="filterSpecialKey" />
                                                    </Listeners>
                                                </ext:TriggerField>
                                            </Items>
                                        </ext:Toolbar>
                                    </TopBar>
                                    <Listeners>
                                        <Click Handler="getReportId(node.text);" />
                                    </Listeners>
                                    <DirectEvents>
                                        <Click OnEvent="TreePanelClick">
                                        </Click>
                                    </DirectEvents>
                                </ext:TreePanel>
                            </Items>
                        </ext:Panel>
                    </ext:LayoutColumn>
                    <ext:LayoutColumn ColumnWidth="1">
                        <ext:Panel runat="server">
                            <Content>
                                <ext:RowLayout ID="RowLayout1" runat="server">
                                    <Rows>
                                        <ext:LayoutRow RowHeight="0.15">
                                            <ext:Panel ID="QueryPanel" runat="server" Frame="false" Border="false">
                                            </ext:Panel>
                                        </ext:LayoutRow>
                                        <ext:LayoutRow>
                                            <ext:Panel ID="SouthPanel" runat="server" Title="South" Padding="6" RowHeight="0.85">
                                                <Content>
                                                    <rsweb:ReportViewer ID="ReportViewer1" runat="server" ProcessingMode="Remote" AsyncRendering="true"
                                                        ZoomPercent="100" ShowToolBar="True" InternalBorderColor="Transparent" PromptAreaCollapsed="True"
                                                        ShowParameterPrompts="False" ShowExportControls="True" ShowPrintButton="true"
                                                        Height="999px" SizeToReportContent="False" ShowRefreshButton="false" Width="100%"
                                                        KeepSessionAlive="true">
                                                        <%--  <ServerReport ReportServerUrl="172.16.100.37/reportserver" ReportPath="/抗菌传统报表/某科抗菌药物临床使用前十名" />--%>
                                                    </rsweb:ReportViewer>
                                                </Content>
                                                <LoadMask ShowMask="true" Msg="正在生成报表..." />
                                            </ext:Panel>
                                        </ext:LayoutRow>
                                    </Rows>
                                </ext:RowLayout>
                            </Content>
                        </ext:Panel>
                    </ext:LayoutColumn>
                </Columns>
            </ext:ColumnLayout>
        </Items>
    </ext:Viewport>
    <asp:HiddenField ID="reportId" runat="server" />
    <%--    <ext:Panel ID="QueryPanel" runat="server" Frame="false" Border="false">
    </ext:Panel>--%>
    <%--       //参数控件--%>
    <%-- <div id="man_zone" class="man_zone" style="min-height: 55px; border: 1px; overflow: auto;">
        <rsweb:ReportViewer ID="ReportViewer1" runat="server" ProcessingMode="Remote" AsyncRendering="true"
            ZoomMode="FullPage" ShowToolBar="True" InternalBorderColor="Transparent" PromptAreaCollapsed="True"
            ShowParameterPrompts="False" ShowExportControls="True" ShowPrintButton="true"
            Height="100%" SizeToReportContent="False" ShowRefreshButton="false" Width="100%"
            KeepSessionAlive="true">
            <ServerReport ReportServerUrl="172.16.100.37/reportserver" ReportPath="/抗菌传统报表/某科抗菌药物临床使用前十名" />
        </rsweb:ReportViewer>
    </div>--%>
    <%--       //报表展示--%>
    <script language="javascript" type="text/javascript">
        Ext.form.ComboBox.prototype.filter = function (field, value) {
            var ds = this.store;
            ds.filter(field, value, true, true);
            ds.realSnapshot = ds.snapshot;
            ds.snapshot = ds.data;
        };
        Ext.form.ComboBox.prototype.clearFilter = function (suppressEvent) {
            var ds = this.store;
            if (ds.realSnapshot && ds.realSnapshot != ds.snapshot) {
                ds.snapshot = ds.realSnapshot;
                delete ds.realSnapshot;
            }
            ds.clearFilter(suppressEvent);
        };
    </script>
    </form>
</body>
server side:


        protected void Page_Load(object sender, EventArgs e)
        {
            ReportViewer1.ServerReport.ReportServerUrl = new Uri("http://172.16.100.37/reportserver");
            ReportViewer1.ServerReport.ReportPath = "/抗菌传统报表/某科抗菌药物临床使用前十名";
        }

 /// <summary>
        /// 报表树单击事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        public void TreePanelClick(object sender, Ext.Net.DirectEventArgs e)
        {
            string strReportText = reportId.Value;
            List<WebNavigation> selectReport = AllWebNavigationList.FindAll(g => g.Name == strReportText);
            if (selectReport != null && selectReport.Count > 0)
                ShowReport(selectReport[0]);
        }
        [Ext.Net.DirectMethod]
        public void ShowReport(WebNavigation report)
        {

            ReportGetBack();
            ReportViewerCredentials rvwCreds = new ReportViewerCredentials("liaolian", "123qwe", "zesing");
            ReportViewer1.ServerReport.ReportServerCredentials = rvwCreds;
            //ReportViewer1.ProcessingMode = ProcessingMode.Remote;
            this.ReportViewer1.ServerReport.ReportServerUrl = new Uri(strReporServertUrl);
            this.ReportViewer1.ServerReport.ReportPath = ((Zesing.Common.Entities.Report)report.BindReport).ReportTemplate.Value;
  this.ReportViewer1.ServerReport.Refresh();
     }