Json HttpClient dosen'；更新WP8后无法获取数据

我使用以下代码从WP8的API获取JSON数据：

HttpClient client = new HttpClient();
client.BaseAddress = new Uri(mainURL.ToString());
HttpResponseMessage response = await client.GetAsync("");
string res = await response.Content.ReadAsStringAsync();
var root = await JsonConvert.DeserializeObjectAsync<Rootobject>(res);

HttpClient=newhttpclient（）；
client.BaseAddress=新Uri（mainURL.ToString（））；
HttpResponseMessage response=wait client.GetAsync（“”）；
string res=wait response.Content.ReadAsStringAsync（）；
var root=await JsonConvert.DeserializeObjectAsync（res）；

一切都很完美，但是当我从web站点更新web API上的数据并尝试再次使用此代码检索数据时，它会获取旧数据，即使在浏览器中访问URL也会获取新数据

当我逐行调试时，我看到“response”对象包含旧数据

我发现解决这个问题的唯一方法是以这种方式重建项目

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如何正确获取更新的数据？

我也有同样的问题。我试过这个也许对你有帮助

HttpWebRequest request = HttpWebRequest.CreateHttp(mainURL.ToString());
     request.Method = "GET or Post";
     request.BeginGetResponse(ResponseCallBack, request);


    void ResponseCallBack(IAsyncResult asyncResult)
     {
     HttpWebRequest request = (HttpWebRequest)asyncResult.AsyncState;
                    HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(asyncResult);
                   using (Stream data = response.GetResponseStream())
                            {
                                using (var reader = new StreamReader(data))
                                {
                                    string jsonString = reader.ReadToEnd();
                                    MemoryStream memoryStream = new MemoryStream(Encoding.Unicode.GetBytes(jsonString));
                                    DataContractJsonSerializer dataContractJsonSerializer = new DataContractJsonSerializer(typeof(Rootobject));
                                    Rootobject yourdata= dataContractJsonSerializer.ReadObject(memoryStream) as Rootobject;

                                }
                            }
     }

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可能涉及一些缓存。尝试向URL添加一些随机字符串，如

client.BaseAddress = new Uri(mainURL.ToString()+"&random="+DateTime.Now.Ticks);