AdderssResolver

addressresolver.cs

 public class AddressResolver
    {
        string language = "en-GB";
        public AddressResolver()
        {

        }
        public AddressResolver(string language)
        {
            this.language = language;
        }

        [DataContract]
        class AddressInfo
        {
            [DataMember(Name = "formatted_address")]
            public string FormattedAddress { get; set; }
        }
        [DataContract]
        class ResultInfo
        {
            [DataMember(Name = "results")]
            public AddressInfo[] Info { get; set; }
        }
        readonly string URITemplate = "http://maps.googleapis.com/maps/api/geocode/json?latlng={0},{1}&sensor=true&language={2}";
        public void AsyncResolve(double lat, double lon, Action<string[]> callback)
        {
            WebClient client = new WebClient();
            client.DownloadStringCompleted += (s, e) =>
                {
                    if (e.Error == null)
                    {
                        var ainfo = ReadToObject<ResultInfo>(e.Result);
                        callback(ainfo.Info.Select(k => k.FormattedAddress).ToArray());
                    }
                    else
                    {
                        callback(new[] { "ERROR:" + e.Error.Message });
                    }
                };
            client.DownloadStringAsync(new Uri(GetFormattedUri(lat, lon)));
        }
        public static T ReadToObject<T>(string json) where T:class
        {
            MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(json));
            DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T));
            T res = ser.ReadObject(ms) as T;
            ms.Close();
            return res;
        }

        private string GetFormattedUri(double lat, double lon)
        {
            return string.Format(CultureInfo.InvariantCulture, URITemplate, lat, lon,language);
        }
    }