高德 地址编码，转为经纬度

  using (var httpClient = new HttpClient())
  {
      var key = "高德地图key";//去高德开放平台免费获取
      var address = "地址";

　　　 //str是获取地址经纬度的接口
      var str = string.Format("https://restapi.amap.com/v3/geocode/geo?key={0}&address={1}&batch=false", key, address);
      var url = new Uri(str);
      var response = httpClient.GetAsync(url).Result;
      var data = response.Content.ReadAsStringAsync().Result;

      dynamic jsonData = JsonConvert.DeserializeObject(data);//转为json
      var geocodes = jsonData.geocodes; //定位
      var status = jsonData.status.Value;//状态
      var count = jsonData.count.Value;//数量
      var location = geocodes[0].location;//金纬度
   }