Object and nested datalists - asp.net

Question

I am having trouble displaying my object in a datalist.
My object loks like this:
public class Course
{
private string courseName;
private DateTime[] courseDates;
public string CourseName
{
get { return courseName; }
set { courseName = value; }
}
public DateTime[] CourseDates
{
get { return courseDates; }
set {
foreach (DateTime dt in courseDates)
{
if (dt < DateTime.Now)
throw new Exception("The date of the course has to be after todays date.");
}
courseDates = value; }
}
public Course(string _courseName, DateTime[] _courseDates)
{
courseName = _courseName;
courseDates = _courseDates;
}
}
When I try to display it in a datalist the name of the course looks ok. But The dates are not shown.
So I was thinking I needed a nested datalist but then I don't know how to fill the second datalist with the dates in the object.

Answer 1

I've show two solutions:
<asp:DataList ID="DataList1" runat="server"
onitemdatabound="DataList1_ItemDataBound">
<ItemTemplate>
<td><%# DataBinder.Eval(Container.DataItem, "CourseName")%></td>
<td><%# RenderDates( DataBinder.Eval(Container.DataItem, "CourseDates"))%></td>
<td>
<asp:DataList ID="DateList" runat="server">
<ItemTemplate>
<td><%# Container.DataItem%></td>
</ItemTemplate>
</asp:DataList>
</td>
</ItemTemplate>
</asp:DataList>
and
public string RenderDates(object dates)
{
DateTime[] ds = dates as DateTime[];
StringBuilder sb = new StringBuilder();
if( ds != null && ds.Length > 0)
{
sb.Append(ds[0]);
for (int i = 1; i < ds.Length; i++)
{
sb.AppendFormat(" - {0}", ds[i]);
}
}
return sb.ToString();
}
protected void DataList1_ItemDataBound(object sender, DataListItemEventArgs e)
{
DataListItem item = e.Item;
if ((item.ItemType == ListItemType.Item) ||
(item.ItemType == ListItemType.AlternatingItem))
{
var innerList= (DataList)item.FindControl("DateList");
innerList.DataSource = ((Course) item.DataItem).CourseDates;
innerList.DataBind();
}
}