WindowsPhone/WP8/WeatherInformation/WeatherInformation/Model/ReverseGeoCode.cs

   1 using Microsoft.Phone.Maps.Services;
   2 using System;
   3 using System.Collections.Generic;
   4 using System.Device.Location;
   5 using WeatherInformation.Resources;
   6
   7 namespace WeatherInformation.Model
   8 {
   9     class ReverseGeoCode
  10     {
  11         public interface IReverseGeoCode
  12         {
  13             void OnCompletedReverseGeoCode(GeoCoordinate geoCoordinate, string city, string country);
  14         }
  15
  16         public IReverseGeoCode Page { get; set; }
  17         public GeoCoordinate CoorDinate { get; set; }
  18
  19         public void DoReverseGeocode(GeoCoordinate geoCoordinate)
  20         {
  21             var currentReverseGeocodeQuery = new ReverseGeocodeQuery();
  22             currentReverseGeocodeQuery.GeoCoordinate = geoCoordinate;
  23             currentReverseGeocodeQuery.QueryCompleted += QueryCompletedCallback;
  24             currentReverseGeocodeQuery.QueryAsync();
  25         }
  26
  27         private void QueryCompletedCallback(object sender, QueryCompletedEventArgs<IList<MapLocation>> eventData)
  28         {
  29             // Commenting out because I have to disable progress dialog even if the async task was cancelled.
  30             //if (eventData.Cancelled)
  31             //{
  32             //    // Be careful!!! If you throw exception from this point your program will finish with "Unhandled Exception".
  33             //    return;
  34             //}
  35
  36             ReverseGeocodeQuery reverseGeocodeQuery = sender as ReverseGeocodeQuery;
  37
  38             // Default values
  39             var city = AppResources.DefaultCity;
  40             var country = AppResources.DefaultCountry;
  41
  42             Exception errorException = eventData.Error;
  43             if (errorException == null)
  44             {
  45                 if (eventData.Result.Count > 0)
  46                 {
  47                     if (eventData.Result[0].Information != null
  48                         && eventData.Result[0].Information.Address != null)
  49                     {
  50                         var address = eventData.Result[0].Information.Address;
  51                         city = string.IsNullOrEmpty(address.City) ? AppResources.DefaultCity : address.City;
  52                         country = string.IsNullOrEmpty(address.Country) ? AppResources.DefaultCountry : address.Country;
  53                     }
  54                 }
  55             }
  56
  57             if (Page != null)
  58             {
  59                 Page.OnCompletedReverseGeoCode(reverseGeocodeQuery.GeoCoordinate, city,country);
  60             }
  61         }
  62     }
  63 }