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I'm trying to use DataBind with an object graph (nested object
hierarchy). I'm getting the top-level object, but not the children. What
am I doing wrong?
The object graph is like this:
Exam has_many Page
Page has_many Question
Question has_many Choice
Question has_many Answer
My controller action looks like this:
public void SubmitStudentExam( [DataBind("Page")] Page[] pages )
{
.....
}
My page code (inline aspx) is this:
<%@ Import Namespace="Offline.WSDL.Services" %>
<%@ Import Namespace="Castle.MonoRail.Framework.Helpers" %>
<%@ Import Namespace="Castle.MonoRail.Framework" %>
<%@ Implements Interface="Castle.MonoRail.Framework.IControllerAware" %>
<script runat="server">
private Controller _controller;
private HtmlHelper h;
private StudentExam studentExam;
//private int idForBackLink;
private Question q;
//private int pageCounter;
public void SetController( Controller controller )
{
_controller = controller;
h = _controller.Helpers["HtmlHelper"] as HtmlHelper;
studentExam = _controller.PropertyBag["studentExam"] as
StudentExam;
//idForBackLink = (int)_controller.PropertyBag["thisID"];
//pageCounter = 0;
}
</script>
<%= h.Form( "SubmitStudentExam." + _controller.Context.UrlInfo.Extension
) %>
<%= h.InputHidden( "[EMAIL PROTECTED]", studentExam.Pages.Length ) %>
<table>
<% for( int pageCount=0; pageCount < studentExam.Pages.Length;
pageCount++ ) { %>
<% Offline.WSDL.Services.Page page = studentExam.Pages[pageCount]; %>
<tr>
<td>
<table>
<tr>
<th colspan="2">
<strong>PAGE <%= pageCount + 1
%></strong>
<%= h.InputHidden(
string.Format( "Page[{0}].ID", pageCount ),
page.ID ) %>
</th>
</tr>
<tr>
<td>ID</td>
<td><%= page.ID %></td>
</tr>
<tr>
<td>Title</td>
<td><%= page.Title %></td>
</tr>
<tr>
<td>Instructions</td>
<td><%= page.Instructions %></td>
</tr>
<tr>
<td>Questions</td>
<td>
<ul>
<% for( int questionCount=0;
questionCount <
page.Questions.Length; questionCount++ ) { %>
<% q =
page.Questions[questionCount]; %>
<li>
<% //h.LinkTo(
q.Text, "Exam", "ExamQuestion",q.ID ) %>
<%=
h.InputHidden( string.Format( "Page[{0}].Questions[{1}].ID",
pageCount, questionCount ), q.ID ) %>
<%=
h.InputHidden( string.Format( "[EMAIL PROTECTED]",
pageCount ), page.Questions.Length ) %><br />
<% switch(
q.QuestionType ) {
case
ExamQuestionTypes.FillInTheBlank:
break;
case
ExamQuestionTypes.ManyMultipleChoice:
break;
case
ExamQuestionTypes.Matching:
break;
case
ExamQuestionTypes.MultipleChoice:
break;
case
ExamQuestionTypes.TrueFalse: %>
<%=
h.InputRadio( string.Format(
"Page[{0}].Questions[{1}].StudentAnswers[0].Text", pageCount,
questionCount ), q.Choices[0].Text ) %> <%= q.Choices[0].Explanation
%><br />
<%=
h.InputRadio( string.Format(
"Page[{0}].Questions[{1}].StudentAnswers[0].Text", pageCount,
questionCount ), q.Choices[1].Text ) %> <%= q.Choices[1].Explanation
%><br />
<% break;
default:
break;
} %>
<% } %>
</li>
</ul>
</td>
</tr>
</table>
</td>
</tr>
<% } %>
</table>
<%= h.SubmitButton( "Submit" ) %>
<%= h.EndForm() %>
Thanks in advance!
Cheers,
Kevin
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