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         /// <summary>
  28         /// It must be running in main thread.
  29         /// </summary>
  30         /// <param name="sender"></param>
  31         /// <param name="eventData"></param>
  32         private void QueryCompletedCallback(object sender, QueryCompletedEventArgs<IList<MapLocation>> eventData)
  33         {
  34             // Commenting out because I have to disable progress dialog even if the async task was cancelled.
  35             //if (eventData.Cancelled)
  36             //{
  37             //    // Be careful!!! If you throw exception from this point your program will finish with "Unhandled Exception".
  38             //    return;
  39             //}
  40
  41             ReverseGeocodeQuery reverseGeocodeQuery = sender as ReverseGeocodeQuery;
  42
  43             // Default values
  44             var city = AppResources.DefaultCity;
  45             var country = AppResources.DefaultCountry;
  46
  47             Exception errorException = eventData.Error;
  48             if (errorException == null)
  49             {
  50                 if (eventData.Result.Count > 0)
  51                 {
  52                     if (eventData.Result[0].Information != null
  53                         && eventData.Result[0].Information.Address != null)
  54                     {
  55                         var address = eventData.Result[0].Information.Address;
  56                         city = string.IsNullOrEmpty(address.City) ? AppResources.DefaultCity : address.City;
  57                         country = string.IsNullOrEmpty(address.Country) ? AppResources.DefaultCountry : address.Country;
  58                     }
  59                 }
  60             }
  61
  62             if (Page != null)
  63             {
  64                 Page.OnCompletedReverseGeoCode(reverseGeocodeQuery.GeoCoordinate, city,country);
  65             }
  66         }
  67     }
  68 }