工作者角色意外错误

Question

我正在尝试将某些JSON数据作为cron作业（定期）获取并将其存储到数据库。所以，我在Azure雇用了一个工人角色。但是http requests失败了。这是代码：

 public override void Run()
    {
        // This is a sample worker implementation. Replace with your logic.
        Trace.TraceInformation("WorkerRole1 entry point called", "Information");

        while (count <= 10)
        {
            WebClient wc = new WebClient();
            string download = "http://api.openweathermap.org/data/2.5/weather?q=Kolkata&units=metric";
            string json = wc.DownloadString(download);



            var jObj = JsonConvert.DeserializeObject(json) as JObject;
            List<JObject> result = jObj["weather"].Children()
                  .Cast<JObject>()

                  .ToList();


            var final = result[0].Children()
                            .Cast<JProperty>()


                            .Select(x => new
                            {
                                temp = (string)x.Value,

                            }).ToList();


            var temp = jObj["main"]["temp"];
            var humidity = jObj["main"]["humidity"];
            var condition = final[2].temp;

            /*SQL insert query for weather data*/
            con.Open();
            cmd = new SqlCommand("INSERT INTO WEATHER(id,temperature,humidity,condition) VALUES(@id,@temp,@humid,@cond)", con);
            cmd.Parameters.AddWithValue("@id", count);
            cmd.Parameters.AddWithValue("@temp", Convert.ToInt32(temp));
            cmd.Parameters.AddWithValue("@humid", Convert.ToInt32(humidity));
            cmd.Parameters.AddWithValue("@cond", condition.ToString());
            cmd.ExecuteNonQuery();
            con.Close();
            Trace.TraceInformation("Working", "Information");
            count++;
  }
}

请告诉我是什么问题，并为我提供解决方案......