GridViewDataItemTemplateContainer - DataItem's object type

Hi,
I'm trying to convert an existing project (using standard asp.net controls) to use Devexpress controls.
But I'm facing a problem with the ASPxGridView.
I have an object let's call it SearchResult and it looks something like this:
public class SearchResult
{
    public int ResultId {get;set;}
    public int ResultName {get;set;}
    public SomeItem[] SomeItems {get;set;}
}
I'm building my gridview in code-behind because I can't tell which columns needed before I get the searchresult.
To generate columns for the "SomeItems" property I'm generating Templates (GridViewDataColumn) using the ITemplate interface - like this:
private class TrackingFieldItemTemplate : ITemplate
{
     string _columnname;
     public TrackingFieldItemTemplate(string columnname)
     {
          _columnname = columnname;
     }
     #region ITemplate Members
     public void InstantiateIn(Control container)
     {
          Label l = new Label();
          l.DataBinding += new EventHandler(l_DataBinding);
          container.Controls.Add(l);
     }
     void l_DataBinding(object sender, EventArgs e)
     {
          Label label = (Label)sender;
          label.Text = "Unknown";
          GridViewDataItemTemplateContainer container = (GridViewDataItemTemplateContainer)label.NamingContainer;
          TrackingFieldDisplay tfd = ((DocumentDisplay)container.DataItem).SomeItems.Find(msg => msg.TrackingFieldTypeName.Equals(_columnname));
          if (tfd != null)
               label.Text = tfd.TrackingFieldValue;
     }
     #endregion
}
My problem is that container.DataItem is not my databound object - and therefore the above code will of course throw an exception.
But how can I retrieve the databound object in my ITemplate implementation?
Thanks!
/Mikkel