从Silverlight上传照片到Facebook

Question

我最近开始将我的一个小应用程序移植到Facebook作为学习体验。我对Silverlight和.NET非常熟悉，但尚未在Facebook上做任何事情。由于所有可用的SDK和API似乎都不起作用，或者我无法正确使用它们，所以我决定直接访问Facebook的Graph API，并且这很容易（我可以登录，请求权限，获取个人资料，相册和照片并发布到用户供稿）。现在我想上传一张照片，这就是我真正打的墙。我使用类似的东西来发布饲料：

 WebClient client = new WebClient(); 
     client.UploadStringCompleted += new UploadStringCompletedEventHandler(client_UploadStringCompleted); 
     client.UploadStringAsync(new Uri(String.Format("https://graph.facebook.com/me/feed")), "POST", 
      String.Format("message={0}&link={1}&picture={2}&access_token={3}", "Test", "www.gong.bg", "http://gong.bg/uploads/teams/teams_logos/logo_small_1.png", this.Access_Token)); 

很简单，但它工作正常，我不需要更多。

照片上传我试图用类似的代码，但没有成功，于是我决定尝试用HttpWebRequest和我现在有以下几点：

 HttpWebRequest request = (HttpWebRequest)WebRequest.Create(String.Format("https://graph.facebook.com/me/photos")); 
     request.ContentType = "multipart/form-data"; 
     request.Method = "POST"; 
     request.BeginGetRequestStream(ar => 
     { 
      using (StreamWriter writer = new StreamWriter((ar.AsyncState as HttpWebRequest).EndGetRequestStream(ar))) 
      { 
       writer.Write("{0}={1}&", "message", HttpUtility.UrlEncode("Test")); 
       writer.Write("{0}[email protected]{1}&", "source", HttpUtility.UrlEncode("3.png")); 
       writer.Write("{0}={1}&", "access_token", this.Access_Token); 
      } 
     }, request); 

这不是工作，我看不出哪里有问题是。根据Facebook的文件，这应该上传一张照片到应用程序的默认相册（创建一个，如果不存在）

谢谢大家。

Answer 1

尝试我的Facebook上的.Net SDK Codeplex。最新的源代码支持silverlight。 http://facebooksdk.codeplex.com

你可以做你正在尝试这样的东西：

 byte[] photo = File.ReadAllBytes(photoPath); 
     FacebookApp app = new FacebookApp(); 
     dynamic parameters = new ExpandoObject(); 
     parameters.access_token = "access_token"; 
     parameters.caption = "Test Photo"; 
     parameters.method = "facebook.photos.upload"; 
     parameters.uid = ConfigurationManager.AppSettings["UserId"]; 
     var mediaObject = new FacebookMediaObject 
     { 
      FileName = "monkey.jpg", 
      ContentType = "image/jpeg", 
     }; 
     mediaObject.SetValue(photo); 
     parameters.source = mediaObject; 
     app.ApiAsync((ar, state) => { 
      var postId = (string)ar.Result; 
     }, null, parameters, HttpMethod.Post); 

Answer 2

看起来这可能是一个简单的错字。尝试删除最后一个符号，所以你得到这个：

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(String.Format("https://graph.facebook.com/me/photos")); 
request.ContentType = "multipart/form-data"; 
request.Method = "POST"; 
request.BeginGetRequestStream(ar => 
{ 
    using (StreamWriter writer = new StreamWriter((ar.AsyncState as HttpWebRequest).EndGetRequestStream(ar))) 
    { 
     writer.Write("{0}={1}&", "message", HttpUtility.UrlEncode("Test")); 
     writer.Write("{0}[email protected]{1}&", "source", HttpUtility.UrlEncode("3.png")); 
     writer.Write("{0}={1}", "access_token", this.Access_Token); 
    } 
}, request);