<asp:ListBox ID="ListBox1" runat="server" Rows="10" AutoPostBack="True" DataSourceID="SqlDataSource1" DataTextField="nome_cat" DataValueField="nome_cat" style=" width:200px;float:left;"></asp:ListBox>
    
    <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:ASPNETDBConnectionString17 %>"
        SelectCommand="SELECT nome_cat, tipo FROM content_categorie WHERE (tipo = N'nome_cat')">
    </asp:SqlDataSource>



    <asp:DetailsView ID="DetailsView2"  runat="server" Height="50px" DataKeyNames="id" Width="125px" AutoGenerateRows="False" DataSourceID="SqlDataSource4">
        <Fields>
            <asp:BoundField DataField="testo" HeaderText="testo" SortExpression="testo" />
        </Fields>
    </asp:DetailsView>
    <asp:SqlDataSource ID="SqlDataSource4" runat="server" ConnectionString="<%$ ConnectionStrings:ASPNETDBConnectionString23 %>" SelectCommand="SELECT id, testo FROM content_categorie WHERE (campo_focus = @campo_focus)" >
        <SelectParameters>
            <asp:Parameter Name="campo_focus" />         
        </SelectParameters>
    </asp:SqlDataSource>