Change value of where parameter

I have a gridview with a linqdatasource.
In the footer of the gridview I have a checkbox.  When a user clicks the checkbox, I need to set my where clause to active = false otherwise active = true.
I can get the checkbox in code behind so I will probably need to change it in the checkbox textchanged event.
How would I do this?

Thanks

<asp:LinqDataSource ID="lnqClientList" runat="server" 
        ContextTypeName="Service2020.SalonDataClassesDataContext" TableName="Clients" 
        Where="UserID == @UserID &amp;&amp; Active == @Active" 
      EnableDelete="True" OrderBy="FullName, LastServiceDate desc">
       <WhereParameters>
         <asp:SessionParameter DbType="Guid" Name="UserID" SessionField="UserID" />
          <asp:Parameter DefaultValue="true" Name="Active" Type="Boolean" />
      </WhereParameters>
   </asp:LinqDataSource>

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