无法从远程服务器绑定到asp.net mvc中的对象中检索Json数据(Unable to retrieve Json data from remote server binding to objec

无法从远程服务器绑定到asp.net mvc中的对象中检索Json数据(Unable to retrieve Json data from remote server binding to object in asp.net mvc)

我正在开发一个Asp.Net mvc应用程序。在我的应用程序中，我需要从远程服务器检索json对象。我正在使用Web客户端。但它给了我错误。我的情况如下。

我有这个网址

http://graph.facebook.com/{fb_id}/picture?width=200&height=200&redirect=false

当我从浏览器访问时，它会返回类似这样的内容

所以我试图以json的形式检索这些数据，然后将它们序列化回来。所以我构建了两个类，如下所示来绑定数据。

public class FacebookAvatarResponse { [JsonProperty("data")] public FacebookAvatarData Data { get; set; } } public class FacebookAvatarData { [JsonProperty("height")] public int Height { get; set; } [JsonProperty("width")] public int Width { get; set; } [JsonProperty("is_silhouette")] public bool IsSilhouette { get; set; } [JsonProperty("url")] public string Url { get; set; } }

在controll中，我构建了一个动作方法

[AllowAnonymous] public JsonResult Test(string avatarDataUrl) { using (WebClient webClient = new WebClient()) { string data = webClient.DownloadString(avatarDataUrl); return Json(JsonConvert.DeserializeObject<FacebookAvatarResponse>(data),JsonRequestBehavior.AllowGet); } }

正如您所看到的，我将该数据作为json获取，然后作为操作结果返回。但是当我请求那个传递正确的url作为参数的action方法时，它给了我这个错误。

我如何从远程服务器绑定到特定类中检索JSON数据？

I am developing an Asp.Net mvc application. In my application, I need to retrieve json object from remote server. I am using web client for it. But it is giving me error. My scenario is below.

I have this url

http://graph.facebook.com/{fb_id}/picture?width=200&height=200&redirect=false

When I access from browser, it return something like this

So I am trying to retrieve that data as json and then serialize them back. So I builds two classes like below to bind that data.

public class FacebookAvatarResponse { [JsonProperty("data")] public FacebookAvatarData Data { get; set; } } public class FacebookAvatarData { [JsonProperty("height")] public int Height { get; set; } [JsonProperty("width")] public int Width { get; set; } [JsonProperty("is_silhouette")] public bool IsSilhouette { get; set; } [JsonProperty("url")] public string Url { get; set; } }

In controll, I built an action method

[AllowAnonymous] public JsonResult Test(string avatarDataUrl) { using (WebClient webClient = new WebClient()) { string data = webClient.DownloadString(avatarDataUrl); return Json(JsonConvert.DeserializeObject<FacebookAvatarResponse>(data),JsonRequestBehavior.AllowGet); } }

As you can see I am getting that data as json and then return as action result. But when I request that action method passing correct url as parameter, it is giving me this error.

How can I retrieve JSON data from remote server binding to the specific classes?