Pass Multiple Checkbox list values to second page using query string

I am using a checkbox list to pass multiple selection values through query string to another page.
Values I am passing are:
Multiple customer no.s(Checkbox list selected values).
amount they shopped(textbox.text)
dateshopped(11/23/2009).

Iam passing the values using the Response.Redirect as:
//This is my first page

List<string> ids = new List<string>();
      
 foreach (ListItem li in ddlCustIDs.Items)
        {
            if (li.Selected)
            {
                ids.Add(li.Text);
            }
        }
  &nb ...