.net后台调用接口

string SName = TextBox1.Text.Trim();

WebClient client = new WebClient();//需要先请求接口

//把接口转换成byte数据流
Byte[] byteTest = client.DownloadData("https://restapi.amap.com/v3/geocode/geo?address=" + SName + "&output=JSON&key=自己的key");

//转换成字符串
string data = Encoding.UTF8.GetString(byteTest);
//反系列化
JObject obj = (JObject)JsonConvert.DeserializeObject(data);

obj["geocodes"][0]["location"].ToString();