Asp.net: how to compare DataBinder.Eval with a member variable?

I am trying to do this in a repeater:

<%# Iif((int)DataBinder.Eval(Container.DataItem, "Id") == SelectedJobDefId, "blue", "red")%>
 

Problem is that the member property only evaluates if this syntax is used:

<%= SelectedJobDefId %>
 

DataBinder.Eval() only works if the hash symbol is used.

As a test, I tried this:

  <%= SelectedJobDefId %>
   <%# DataBinder.Eval(Container.DataItem, "Id") + " " + SelectedJobDefId %>
 

The first SelectedJobDefId stays correct as I switch rows (LinkButton event).
The DataBinder part is correct for each row.
The 2nd output of SelectedJobDefId is always "1".

How can I compare these two values?

---