I've got an aspx page that renders an ascx page with filtering capabilities. Inside the ascx page, parameters are passed as follows:

<tr>
    <td class="label">Plataforma</td>
    <td class="field lookup"><%= Html.Lookup("s.Site", null, Url, "Sites") %></td>
</tr>
<tr>
    <td class="label">Data</td>
    <td class="field date"><%= Html.TextBox("s.Date", DateTime.Today.ToString("yyyy-MM-dd")) %></td>
</tr>

I need to be able to get those parameters on the main aspx page, because they are needed for an action that is called there. How could I access these parameters?