Finding a control in a multiple level nested repeater 1

[jondow]

Hi, I have the following page which all works as it should. Withing the rptQuestionAnswerType repeater I have a checkboxlist control (cbAnswer) which I need to reference (and check the nessesary values) via code. As its nested under a number of levels of repeater I am unsure how to do this, can anyone help?

I am using VS2005, ASP.NET with VB.NET 2.0

Thanks!


<%@ Page Language="VB" MasterPageFile="~/MasterPage.master" AutoEventWireup="false" CodeFile="Question.aspx.vb" Inherits="Question" %>
<asp:Content ID="Content1" ContentPlaceHolderID="MainContent" Runat="Server">
<h1><asp:Label ID="lblPageName" runat="server" Text=""></asp:Label></h1>
<asp:Label ID="lblPageText" runat="server" Text=""></asp:Label>
<!--Level 0 Repeater Start - The question group-->
<asp:Repeater ID="RptQuestionGroup" runat="server">
<HeaderTemplate>
<table class="QuestionPage">
</HeaderTemplate>
<ItemTemplate>
<tr>
<td class="Group">
<asp:Label ID="lblGroupName" runat="server" Text='<%# Container.Dataitem("grp_name") %>'></asp:Label>
&nbsp;
</td>
</tr>
<tr id="trGroupText" runat="server" visible='<%# iif(Container.Dataitem("grp_text") = "", False, True) %>'>
<td class="GroupText">
<asp:Label ID="lblGroupText" runat="server" Text='<%# Container.Dataitem("grp_text") %>'></asp:Label>
&nbsp;
</td>
</tr>
<!--Level 1 Repeater Start - The Question-->
<asp:Repeater ID="RptQuestion" runat="server" datasource='<%# Ctype(Container.Dataitem,system.data.DataRowView).Row.GetChildRows("QuestionsInGroup")%>' >
<ItemTemplate>

<tr id="trQuestionName" runat="server" visible='<%# iif(Container.Dataitem("que_name") = "", False, True) %>'>
<td>
<asp:Label ID="lblQuestionName" runat="server" Text='<%# Container.Dataitem("que_name") %>'></asp:Label>
&nbsp;
</td>
</tr>
<tr id="trQuestionText" runat="server" visible='<%# iif(Container.Dataitem("que_text") = "", False, True) %>'>
<td class="QuestionText">
<asp:Label ID="lblQuestionText" runat="server" Text='<%# Container.Dataitem("que_text") %>'></asp:Label>
&nbsp;
</td>
</tr>
<!--Level 2 Repeater Start - The question Type, includes multipart questions such as first name/last name-->
<asp:Repeater ID="RptQuestionAnswerType" runat="server"
datasource='<%# Ctype(Container.Dataitem,system.data.DataRow).GetChildRows("QuestionTypes")%>' >
<ItemTemplate>
<!--Level 3 Data Start - Only applicible to multi answer questions (radio, checkbox, dropdown)-->


<tr id="trCheck" runat="server" visible='<%# iif(Container.Dataitem("atp_name") = "Check", true, false) %>'>
<td>
<asp:CheckBoxList ID="cbAnswer" runat="server"
DataSource='<%# Ctype(Container.Dataitem,system.data.DataRow).GetChildRows("QuestionAnswers")%>'
DataValueField="ans_id" DataTextField="ans_name" EnableViewState="true" ValidationGroup="valQuestion">
</asp:CheckBoxList>

</td>
</tr>


<!--Level 3 Data End-->

</ItemTemplate>
<FooterTemplate>
<tr>
<td class="Footer">
&nbsp;<!--Just a spacer row-->
</td>
</tr>
</FooterTemplate>

</asp:Repeater>
<!--Level 2 Repeater End-->


</ItemTemplate>

</asp:Repeater>
<!--Level 1 Repeater End-->
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:Repeater>
<!--Level 0 Repeater End-->
<br />
<br />

<asp:Button ID="btnSubmit" runat="server" Text="Submit" ValidationGroup="valQuestion" CssClass="txtbutton" />
<br />
<asp:Label ID="lblError" runat="server"></asp:Label>
</asp:Content>

 

[ca8msm]

There are a few ways you can do this. You can either:

1. Look through the controls collection when debugging (i.e. RptQuestionGroup.Controls(x[/x])...)
2. Use FindControl on the parent of the control you are lookign for
3. Use a recursive method to check through every control


-------------------------------------------------------

Mark,
[URL unfurl="true"]http://aspnetlibrary.com[/url]
[URL unfurl="true"]http://mdssolutions.co.uk[/url] - Delivering professional ASP.NET solutions
[URL unfurl="true"]http://weblogs.asp.net/marksmith[/url]

 

[jondow]

Hi,

Thanks for your response. I have tried your second suggestion but have been unsuccesful. Option 3 seems sensible, however i imagine this would be quite a processor intensive/slow way on a page with lots of content, do you agree?

 

[ca8msm]

Yes, it would be (although you could just write it once to make sure you have the correct path to the parent and then use option #1 or ideally #2).


-------------------------------------------------------

Mark,
[URL unfurl="true"]http://aspnetlibrary.com[/url]
[URL unfurl="true"]http://mdssolutions.co.uk[/url] - Delivering professional ASP.NET solutions
[URL unfurl="true"]http://weblogs.asp.net/marksmith[/url]

 

[jmeckley]

Option 3 seems sensible, however i imagine this would be quite a processor intensive/slow way on a page with lots of content, do you agree?

if the system is slow/unresponsive it won't be from recursing through controls. the bottleneck would occur from either poor IO throughput or network latency.

Jason Meckley
Programmer
Specialty Bakers, Inc.