datalist within a datalist?

[pete K]

Is it possible in asp.net to have a datalist in the itemtemplate of another
datalist?

For example:

<asp:datalist id="MyList" runat="server">
<ItemTemplate >
<table border="0" width="300">
<tr>
<td><%# DataBinder.Eval (Container.Data Item, "title") %></td>
</tr>
<tr>
<td><asp:datali st id="AnotherList " runat="server">
<ItemTemplate >
<%# DataBinder.Eval (Container.Data Item, "something" )
%>
</ItemTemplate>
</td>
</tr>
</table>
</ItemTemplate>
</asp:datalist>

Then in the Code behind:

MyList.DataSour ce = MyDatabase.GetT itles(); // MyDatabase.GetT itles returns
a dataset
MyList.DataBind ();
AnotherList.Dat aSource = MyDatabase.GetS omething();
AnotherList.Dat aBind();

I keep getting a "System.NullRef erenceException : Object reference not set to
an instance of an object" error when it gets to the AnotherList.Dat aSource
line.

So is it possible to have a Datalist in another Datalist, and if so, what's
the correct way of doing it?

[pete K]

Okay, I get it now. I have to use a OnItemDataBound , then in the Code behind,
check the e.Item.ItemType == ListItemType.It em and AlternatingItem , then
DataList MyDataList = (DataList)e.Ite m.FindControl(" MySomething");

I have to find the control because it's contained within the first datalist.
Makes sense.

"pete K" wrote:

Is it possible in asp.net to have a datalist in the itemtemplate of another
datalist?

For example:

<asp:datalist id="MyList" runat="server">
<ItemTemplate >
<table border="0" width="300">
<tr>
<td><%# DataBinder.Eval (Container.Data Item, "title") %></td>
</tr>
<tr>
<td><asp:datali st id="AnotherList " runat="server">
<ItemTemplate >
<%# DataBinder.Eval (Container.Data Item, "something" )
%>
</ItemTemplate>
</td>
</tr>
</table>
</ItemTemplate>
</asp:datalist>

Then in the Code behind:

MyList.DataSour ce = MyDatabase.GetT itles(); // MyDatabase.GetT itles returns
a dataset
MyList.DataBind ();
AnotherList.Dat aSource = MyDatabase.GetS omething();
AnotherList.Dat aBind();

I keep getting a "System.NullRef erenceException : Object reference not set to
an instance of an object" error when it gets to the AnotherList.Dat aSource
line.

So is it possible to have a Datalist in another Datalist, and if so, what's
the correct way of doing it?