JB,

That's what I would have thought...however, in Web Forms (this is from a prior message from Cathi Gero), the Web forms DropDownList does not allow setting the SelectedIndex to -1. You need to do something like...

this.DropDownList1.DataBind();
this.DropDownList1.Items.Insert(0,"");

The original message ID for this was 884676

K