How to pass a column in a table of database into autocomplete plugin of JQuery?

Please look at following code:

Data in above code is a array. Now I want data is a column in table or a dataset. Then how do I write code in page .aspx to achieve it. Please don't use JSon + MVC because I use .NET 2.0. Help me. Thanks you very much.

in order to use Autocomplete feature from a DB use an HTTP Handler
to expose the DB information

here is a sample :

  type="text/javascript">
  $(document).ready(function(){
      $("#txtSearch").autocomplete('autocompletetagdata.ashx');
  });      


[WebService(Namespace = "http://www.yoursite.com/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class AutocompleteTagData : IHttpHandler
{
    public void ProcessRequest(HttpContext context)
    {
        // Note the query strings passed by jquery autocomplete:
        //QueryString: {q=a&limit=150×tamp=1227198175320}

        LookupTagCollection tags = Select.AllColumnsFrom()
            .Top(context.Request.QueryString["limit"])
            .Where(LookupTag.Columns.TagDescription).Like(context.Request.QueryString["q"] + "%")
            .OrderAsc(LookupTag.Columns.TagDescription)
            .ExecuteAsCollection();

        foreach (LookupTag tag in tags)
        {
            context.Response.Write(tag.TagDescription + Environment.NewLine);
        }
    }

    public bool IsReusable
    {
        get
        {
            return false;
        }
    }
}