I'm running into weird behavior in the ASP.NET DataGrid's ItemTemplate element.  Specifically, for an asp:HyperLink, the below code breaks...

<asp:HyperLink Runat="server" Target="_blank" 
NavigateUrl='http://myserver/recorddetail.asp?recnum=
<%# Container.DataItem("recnum")%>'>
<%# DataBinder.Eval(Container.DataItem,"recnum")%>
</asp:HyperLink>

The (HTML) output in the DataGrid looks like: 

 <A href="http://myserver/recorddetail.asp?recnum=<%# Container.DataItem("recnum")%>0400123</A>

Not exactly what I'm after...I've tried a number of variations, and any articles I've found online give examples that look just like mine.