/// <summary>
        /// 执行地图查询.
        /// </summary>
        private void DoMapQuery()
        {
            BaiduMapService     service = new BaiduMapService();
            BaiduGeocoderResult result  = service.Geocoding(this.txtAddress.Text);

            if (result.result != null &&
                result.result.location != null)
            {
                this.lon = result.result.location.lng;
                this.lat = result.result.location.lat;
            }
        }
        /// <summary>
        /// 执行地图查询.
        /// </summary>
        private void DoMapQuery()
        {
            BaiduMapService service = new BaiduMapService();
            BaiduGeocoderResult result = service.Geocoding(this.txtAddress.Text);

            if (result.result != null
                && result.result.location != null)
            {
                this.lon = result.result.location.lng;
                this.lat = result.result.location.lat;
            }
        }