根据百度，gps坐标获取天气

楼主用的是阿里天气免费版，限制1000次，可以重复购买

下面放代码

            var orgWindow = new OrganizeWindowProxy(WorkContext);
            var orgInfo = orgWindow.GetInfoByID(organizeId);
            var coord = orgInfo.Map.MapList[0];
            string lat = "0", lng = "0";
            if (coord != null)
            {
                lat = coord.Lat; lng = coord.Lnd;
            }
            const String host = "http://saweather.market.alicloudapi.com";
            const String path = "/gps-to-weather";
            const String method = "GET";
            const String appcode = "1e37984a57494b14ae6131e760651397";
            String querys = string.Format("from=5&lat={0}&lng={1}&need3HourForcast=0&needAlarm=0&needHourData=0&needIndex=0&needMoreDay=0", lat, lng);
            String bodys = "";
            String url = host + path;
            HttpWebRequest httpRequest = null;
            HttpWebResponse httpResponse = null;

            if (0 < querys.Length)
            {
                url = url + "?" + querys;
            }
            httpRequest = (HttpWebRequest)WebRequest.Create(url);
            httpRequest.Method = method;
            httpRequest.Headers.Add("Authorization", "APPCODE " + appcode);
            if (0 < bodys.Length)
            {
                byte[] data = Encoding.UTF8.GetBytes(bodys);
                using (Stream stream = httpRequest.GetRequestStream())
                {
                    stream.Write(data, 0, data.Length);
                }
            }
            try
            {
                httpResponse = (HttpWebResponse)httpRequest.GetResponse();
            }
            catch (WebException ex)
            {
                httpResponse = (HttpWebResponse)ex.Response;
            }
            Stream st = httpResponse.GetResponseStream();
            StreamReader reader = new StreamReader(st, Encoding.GetEncoding("utf-8"));
            var weatherJosn = reader.ReadToEnd();
            return Json(weatherJosn, JsonRequestBehavior.AllowGet);