Monday, March 26, 2012

Access nested properties

Hello everyone.
I have the following problem converning listview property binding.:
My classes are:
[DataObject]
public class Obj1 {
...
[DefaultValue ("New name")]
[DataObjectField (false)]
public string Name {
get { return this.name; }
set { this.name = value; }
}
[DataObjectField (false)]
public Obj2 Nested {
get { return this.nested; }
set { this.nested = value; }
}
...
}
and
[DataObject]
public class Obj2 {
...
[DefaultValue ("New name")]
[DataObjectField (false)]
public string Name {
get { return this.name; }
set { this.name = value; }
}
...
}

and then I use the ListView. It loads an array of Obj1 objects and successfully puts them in the listView
Then in my item template I have something like this: ...
<strong id="Strong3" runat="server">
<atlas:Label ID="name" runat="server">
<Bindings>
<atlas:Binding DataPath="Name" Property="text" />
</Bindings>
</atlas:Label>
</strong>
</td>
<td>
<strong id="Strong5" runat="server">
<atlas:Label ID="nested" runat="server">
<Bindings>
<atlas:Binding DataPath="Nested" Property="text" />
</Bindings>
</atlas:Label>
</strong>
The output is as expected : obj1.Name is shown as it is and obj1.Nested is shown as [object].
When I change:
<atlas:Binding DataPath="Nested" Property="text" />
to
<atlas:Binding DataPath="Nested.Name" Property="text" />
I get an empty text.
Any hints for that?
Thanks in advance

I don't think the current JSON serializer serializes the server-side properties to client-side properties. I think it only creates an object with public fields.
The DataPath in Binding only supports properties. The reason why the top-level field _does_ work is that the client-side DataRow overrides getProperty and returns a field (ie. calling myDataRow('Name') returns myDataRow['Name'], which equals to myDataRow.Name).

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