后台请求API

//Url为请求路径
 public static string RequestUrl(string url, System.Text.Encoding encode)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(new Uri(url));
            request.Method = "Get";
            request.ContentType = "application/x-www-form-urlencoded";
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            using (System.IO.StreamReader reader = new System.IO.StreamReader(response.GetResponseStream(), encode))
            {
                return reader.ReadToEnd();
            }
        }