I have a List of Of Objects and id like to query the list with multiple parameters to whittle down the results on a search page.

```
     int SecLink = (!string.IsNullOrEmpty(Request.QueryString["Sector"])) ? Convert.ToInt32(Request.QueryString["Sector"]) : 0;
        int LocLink = (!string.IsNullOrEmpty(Request.QueryString["Location"])) ? Convert.ToInt32(Request.QueryString["Location"]) : 0;
        int IndLink = (!string.IsNullOrEmpty(Request.QueryString["Industry"])) ? Convert.ToInt32(Request.QueryString["Industry"]) : 0;
        int VacLink = (!string.IsNullOrEmpty(Request.QueryString["Vacancy"])) ? Convert.ToInt32(Request.QueryString["Vacancy"]) : 0;

        string keyword = Request.QueryString["SearchTerm"];

        var dx = new DataX();
        var lstJobs = dx.GetAllJobs().Where(x => x.SectorLink.Equals(SecLink) && x.LocationLink.Equals(LocLink) && x.IndustryLink.Equals(IndLink) && x.VacancyTypeLink.Equals(VacLink) && x.JobName.Contains(keyword)).ToList();

        if (lstJobs.Count > 0)
        {
            uiRptSearchJobs.DataSource = lstJobs;
            uiRptSearchJobs.DataBind();

            uiLitSearchResults.Text = string.Format("<h4>Search result found {0} matches</h4>", lstJobs.Count);
        }

```

The search params may be '0' as not selected from the previous page, so the results should reflect his.

This is the querystring im passing:

`Default.aspx?section=search&Sector=4&Location=0&Industry=0&Vacancy=0&SearchTerm=`

but as you can see they querystring will change with what the user selects from the previous page.