Is it legal to define a default value for a parameter the way I am in the code below? It keeps throwing an "Input string was not in a correct format." error for me.
Is there a different way I should be doing this?

        <asp:LinqDataSource ID="lds_numbers" runat="server" ContextTypeName="nrm.prop.myDataContext"
            TableName="Sources" Where="myNumber== @myNumber" EnableDelete="True"
            EnableInsert="True" EnableUpdate="True">
            <WhereParameters>
                <asp:Parameter DefaultValue='<%= this.StateItems["myNumber"] %>' Name="myNumber" Type="Int32" />
            </WhereParameters>
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