小程序获取手机号亲测成功

public AccessTokenModel xcx_Get_Token2()
        {
            AjaxResult result = new AjaxResult();
            AccessTokenModel AccessTokenModel = new AccessTokenModel();
            try
            {
                string url = string.Format("https://api.weixin.qq.com/cgi-bin/token?appid={0}&secret={1}&grant_type=client_credential", "..............", ".....................");
                string jsonData = Common.Common.HttpGet(url);
                JavaScriptSerializer js = new JavaScriptSerializer();   //实例化一个能够序列化数据的类
                AccessTokenModel accesstokenmodel = js.Deserialize<AccessTokenModel>(jsonData);    //将json数据转化为对象类型并赋值给list
                if (!string.IsNullOrEmpty(accesstokenmodel.access_token))
                {
                    AccessTokenModel = accesstokenmodel;
                }
                else
                {
                    AccessTokenModel = new AccessTokenModel();
                }
            }
            catch (Exception ex)
            {
                AccessTokenModel = new AccessTokenModel();
            }
            return AccessTokenModel;
        }

        [HttpPost]
        public JsonResult getPhone(string code)
        {
            AjaxResult res = new AjaxResult();
            res.state = false;
            try
            {
                string AccessToken = xcx_Get_Token2().access_token;//获取access_token
                string _url = string.Format("https://api.weixin.qq.com/wxa/business/getuserphonenumber?access_token={0}", AccessToken);
                //json参数
                string jsonParam = Newtonsoft.Json.JsonConvert.SerializeObject(new
                {
                    code = code
                });
                var request = (HttpWebRequest)WebRequest.Create(_url);
                request.Method = "POST";
                request.ContentType = "application/json;charset=UTF-8";//ContentType
                byte[] byteData = Encoding.UTF8.GetBytes(jsonParam);
                int length = byteData.Length;
                request.ContentLength = length;
                Stream writer = request.GetRequestStream();
                writer.Write(byteData, 0, length);
                writer.Close();
                var response = (HttpWebResponse)request.GetResponse();
                var responseString = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding("utf-8")).ReadToEnd();

                JavaScriptSerializer js = new JavaScriptSerializer();   //实例化一个能够序列化数据的类
                PhoneModel PhoneInfo = js.Deserialize<PhoneModel>(responseString);
                res.state = true;
                res.data = PhoneInfo.phone_info.phoneNumber;
            }
            catch (Exception ex)
            {
                res.state = false;
                res.message = ex.Message;
            }
            return Json(res, JsonRequestBehavior.AllowGet);
        }

public class AjaxResult
    {
        /// <summary>
        /// 状态码
        /// </summary>
        public object state = false;
        /// <summary>
        /// 返回消息内容
        /// </summary>
        public string message { get; set; }
        /// <summary>
        /// 返回数据
        /// </summary>
        public object data { get; set; }
        public object obj { get; set; }
    }

public class PhoneModel
        {
            public int errcode { get; set; }
            public string errmsg { get; set; }
            public Phone_Info phone_info { get; set; }
        }

        public class Phone_Info
        {
            public string phoneNumber { get; set; }
            public string purePhoneNumber { get; set; }
            public int countryCode { get; set; }
            public Watermarks watermark { get; set; }
        }

        public class Watermarks
        {
            public int timestamp { get; set; }
            public string appid { get; set; }
        }