IF Statement in aspx page doesnt work in asp.net ?

Why doesnt work the code below?
<asp:Repeater ID="repNieuwsbriefItems" runat="server">
            <ItemTemplate>
                <%# if(Eval("Style").ToString() == "0")
With a <% it works, but  then i can't use the Eval to get the item from the datasource...
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