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03.12.2008 at 08:31PM PDT, ID: 23237472
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6.6

AJAX Accordion Control - How to set selected index of an accordion within another accordion?

Asked by kmoloney in Programming for ASP.NET, Visual Studio, .NET Framework 2.x

Tags: ,

I have an asp.net web application being developed in VS2005 (Visual Basic), which uses an Accordion control as the navigating control (left banner) of a master page.  The default behavior of an accordion control  when used in a master page is to re-open the 0-index accordion pane on postback.  I wanted to keep the active pane open, so that the user wouldn't have to keep on clicking on the same pane header over and over to see the hyperlinks in the content section of that pane.

I kind of solved this problem (see Q_23218319) by placing code in the content page (see sample code A in Code Snippet below).  "AccordionLBanner" is the name of the accordion.  When the page loads, it simply uses the findcontrol method of the master (page) to set the selectedindex to the index of the accordion pane from which it was called.

NOW it gets really fun!!  The content of an accordion pane can contain whatever html we want, including other Accordion Controls.  So, within one of the accordion panes in "AccordionLBanner," I have another accordion control, which itself has a couple of its own panes, and their own hyperlinks.

For some reason, while the master.Findcontrol method works fine for the main accordion and its immediate sub-panes, it doesn't seem to work for an accordion control within an accordion control.    See sample Code B.

So, how do I go about doing this?  Is it possible?  Why doesn't master.findcontrol find the embedded accordion within the accordion?Start Free Trial 
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SAMPLE CODE A:  KEEPING THE 'ACTIVE' BANNER OPEN
=================================================
 
Imports AjaxControlToolkit
 
Partial Class UnderConstruction
    Inherits System.Web.UI.Page
 
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Dim mpAccordion As Accordion
        mpAccordion = CType(Master.FindControl("AccordionLBanner"), Accordion)
        mpAccordion.SelectedIndex = clsShared.apID._EVENTS  '// in this case, = 2
 
    End Sub
End Class
 
SAMPLE CODE B:  master.findcontrol DOESN'T RETURN THE SECOND-LEVEL ACCORDION CONTROL...
=========================================
 
Imports AjaxControlToolkit
 
Partial Class Services_Geriatric
    Inherits System.Web.UI.Page
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Dim mpAccordion As Accordion
        '   ============================================================
        '   NOTE:  THIS IS THE PAGE_LOAD CODEBEHIND FOR A PAGE CALLED Geriatric.aspx.
        '   mpAccordion returns NOTHING.
        '====================================================================
        '   
        mpAccordion = CType(Master.FindControl("ac_Services"), Accordion)
        mpAccordion.SelectedIndex = clsShared.apServices._SHARED    '// in this case, 3
 
    End Sub
End Class
 
SAMPLE CODE C:  MASTER PAGE STRUCTURE (SOME CODE OMITTED)
=========================================================
 
<cc1:Accordion 
                ID="AccordionLBanner" 
                runat="server" 
                fadetransitions=true 
                framespersecond="60" 
                TransitionDuration="250" 
                AutoSize="none" SuppressHeaderPostbacks=true
                HeaderCssClass="accordionHeader" 
                ContentCssClass="accordionContent">
                
                
                <Panes>
                
                <cc1:AccordionPane ID="ap_Home" runat="server">
                    <Header>
                        
                            Home
                        
                    </Header>
                    
                    <Content>
                        <asp:HyperLink ID="hypHome" runat="server" NavigateUrl="~/Default.aspx">Home</asp:HyperLink><br />
                        <asp:HyperLink ID="hypMission" runat="server" NavigateUrl="~/Mission.aspx">Mission Statement</asp:HyperLink><br />
                        <asp:HyperLink ID="hypHistory" runat="server" NavigateUrl="~/History.aspx">History</asp:HyperLink><br />
                        <asp:HyperLink ID="hypEligibility" runat="server" NavigateUrl="~/Eligibility.aspx">Eligibility</asp:HyperLink><br />
                        <asp:HyperLink ID="hypAccreditations" runat="server" NavigateUrl="~/Accreditation.aspx">Accreditations</asp:HyperLink><br />
                        <asp:HyperLink ID="hypTestimonial" runat="server" NavigateUrl="~/testimonial.aspx">Testimonials</asp:HyperLink>
                        
                        
                        
                        
 
                    </Content>
                </cc1:AccordionPane>
                    
                
 
.
.
.
                
                <cc1:AccordionPane 
                    ID="Services"
                       runat="server">
                    <Header>
 
                            Services
 
                    </Header>
                    
                    <Content>
                        <cc1:Accordion 
                            ID="ac_Services"
                            runat="server"
                            fadetransitions=true
                            framespersecond="60" 
                            TransitionDuration="250"
                            AutoSize="none" suppressheaderpostbacks=true
                            HeaderCssClass="accordionHeader" 
                            ContentCssClass="accordionContent">
                        <Panes>
                            
                            <%--MI SERVICES SUB-PANE--%>
                            
                            <cc1:AccordionPane
                                ID="ap_MI_Services"
                                runat="server">
                                <Header>
                                    MI Services
                                </Header>
                                <Content>
                                
                                
                                    <asp:HyperLink ID="hypAct" runat="server" NavigateUrl="~/Services/ACT.aspx">ACT</asp:HyperLink><br />
                                    <asp:HyperLink ID="hypCSM" runat="server" NavigateUrl="~/Services/CaseManagement.aspx">Case Management</asp:HyperLink><br />
                                    <asp:HyperLink ID="hypDBT" runat="server" NavigateUrl="~/Services/DBT.aspx">DBT</asp:HyperLink><br />
                                    
    
 
                                    
                                                   
                                </Content>
                            </cc1:AccordionPane>
                            
                            <%--DD SERVICES SUB-PANE--%>
                            
                            <cc1:AccordionPane
                                ID="ap_DDServices"
                                runat="server">
                                <Header>
 
                                        DD Services
 
                                </Header>
                                <Content>
                                    <%--REMOVED FAMILY SERVICES LINE FOR NOW - REF IS STILL THERE--%>
                                    <%--<a href=/TTI2008/Services/FamilyServices.aspx>Family Services</a><br />--%>
                                    
                                    <asp:HyperLink ID="hypSC" runat="server" NavigateUrl="~/Services/SupportsCoordination.aspx">Supports Coordination</asp:HyperLink><br />
                                    <asp:HyperLink ID="hypReach" runat="server" NavigateUrl="~/Services/Reach.aspx">Project R.E.A.C.H.</asp:HyperLink>
                                                                        
                                    
 
                                </Content>    
                            </cc1:AccordionPane>
                            
                            <%--SUPPORT SERVICES SUB-PANE--%>
                            
                            <cc1:AccordionPane
                                ID="ap_SupportServices"
                                runat="server">
                                <Header>
 
                                        Support / Secondary Services
 
                                </Header>
                                <Content>
                                
                                    <asp:HyperLink ID=hypSSO runat="server" NavigateUrl="~/Services/SupportServicesOverview.aspx">Support Services Overview</asp:HyperLink><br />
                                    <asp:HyperLink ID=hypGeriatric runat="server" NavigateUrl="~/Services/Geriatric.aspx">Geriatric</asp:HyperLink><br />
                                    <asp:HyperLink ID=hypHousing runat="server" NavigateUrl="~/Services/Housing.aspx">Housing</asp:HyperLink><br />
                                    <asp:HyperLink ID=hypOT runat="server" NavigateUrl="~/Services/OccupationalTherapy.aspx">Occupational Therapy</asp:HyperLink><br />
                                    <asp:HyperLink ID=hypPsychoTherapy runat="server" NavigateUrl="~/Services/Psychotherapy.aspx">PsychoTherapy</asp:HyperLink><br />
                                    <asp:HyperLink ID=hypGroupTherapy runat="server" NavigateUrl="~/Services/Psychotherapy.aspx">Group Therapy</asp:HyperLink><br />
                                    <asp:HyperLink ID=hypResidential runat="server" NavigateUrl="~/Services/Residential.aspx">Residential Services</asp:HyperLink><br />
                                    <asp:HyperLink ID=hypClubhouse runat="server" NavigateUrl="~/Services/Clubhouse.aspx">Clubhouse (P.S.R.)</asp:HyperLink>
                                
 
                                    
                                </Content>    
                            </cc1:AccordionPane>
 
                        </Panes>
                        
                    
                    </cc1:Accordion>
                   </Content> 
               </cc1:AccordionPane>
            
           
.
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.
  
           
            
            </Panes>
            </cc1:Accordion>
[+][-]03.12.2008 at 08:57PM PDT, ID: 21113230

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[+][-]03.12.2008 at 09:50PM PDT, ID: 21113418

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About this solution

Zones: Programming for ASP.NET, Visual Studio, .NET Framework 2.x
Tags: ASP.NET, VB (VS 2005), Internet Explorer 7, Firefox 2
Sign Up Now!
Solution Provided By: kmoloney
Participating Experts: 0
Solution Grade: A
 
 
[+][-]03.12.2008 at 09:52PM PDT, ID: 21113434

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