<asp:Label ID="lblTaxRate" runat="server" Text = '  <%# Eval("TaxRate")  %>'></asp:Label>

<asp:Label ID="lblTaxRate" runat="server" Text = '<%# String.IsNullOrEmpty(Convert.ToString(Eval("TaxRate"))) == true ? "" : Eval("TaxRate", "${0}")%>  ' > </asp:Label>

<asp:Label ID="lblTaxRate" runat="server" Text = '  <%# Eval("TaxRate", "${0}") %>'></asp:Label>

<%# DataBinder.Eval(Container.DataItem, "TaxRate", "{0:c}") %>

<%#"$" + Eval("TaxRate") %>'>