<%@ WebHandler Language="C#" Class="addressLookup" %>

using System;
using System.Web;

public class addressLookup : IHttpHandler {

    // calls http://rpc.geocoder.us/dist/eg/clients/GeoCoder.wsdl
   
    public void ProcessRequest (HttpContext context) {
        String myAddress = "";
        String myLatitude = "";
        String myLongitude = "";
        String myError = " ";
        String myHelp = "; its value should be formed like '154 Nassau St, Princeton, NJ 08540'";

        myAddress = context.Request.Params.Get("address");
        
        if (myAddress == null) {
            myError = "parameter 'address' was null" + myHelp;
        }
        else {
            if (myAddress.Length == 0) {
                myError = "parameter 'address' was empty string" + myHelp;
            }
            else { // argument exists
                try {
                    us.geocoder.rpc.GeoCode_Service myService =
                        new us.geocoder.rpc.GeoCode_Service();
                    us.geocoder.rpc.GeocoderAddressResult[] results = null;
                    results = myService.geocode_address(myAddress);
                    if (results.Length > 0) // this fails if no result
                    {
                        myLatitude = results[0].lat.ToString();
                        myLongitude = results[0].@long.ToString();
                    }
                    else
                    {
                        myError = "no results";
                    }
                }
                catch (Exception ex) {
                    myError = ex.Message;
                }
            } // end else argument exists
        } // end else argument not null

        context.Response.Write("<?xml version=\"1.0\"?>");
        context.Response.ContentType = "text/xml";
        context.Response.AddHeader("Cache-Control", "no-cache");
        context.Response.Write("<stuff>");
        context.Response.Write("<latitude>" + myLatitude + "</latitude>");
        context.Response.Write("<longitude>" + myLongitude + "</longitude>");
        context.Response.Write("<error>" + myError + "</error>");
        context.Response.Write("</stuff>");
    } // end ProcessRequest
    

    public bool IsReusable {
        get {
            return false;
        }
    }

}