Facebook SDK MVC3 - 丢失的画布会话

Question

我的Facebook SDK for MVC3存在问题[1]：http://docs.csharpsdk.org/

每次回发时我都丢失了会话和当前上下文。我需要帮助！

  

CODE

            public class OverviewController :Controller
                {
                    public readonly FacebookClient _fb;
                    public readonly IMyFacebookCanvasContext _fbCanvasContext;
                    private readonly string[] ExtendedPermissions = new[] { "user_about_me", "publish_stream", "read_stream" };

         public OverviewController(FacebookClient fb, IMyFacebookCanvasContext fbCanvasContext)
                {
                        _fb = fb;
                        _fbCanvasContext = fbCanvasContext;
                }

public ActionResult Index()
        { 
       dynamic result = _fb.Get("me", new { fields = new[] { "name", "picture" } 

       return View();
        }
    }

我使用了这个例子[1]：https://github.com/facebook-csharp-sdk/facebook-canvas-mvc

Answer 1

您需要手动维护signed_request以进行回发和ajax请求。 https://stackoverflow.com/a/5364815/157260

Answer 2

只需将其添加到您的global.asax：

protected void Application_BeginRequest(Object sender, EventArgs e)
{
    HttpContext.Current.Response.AddHeader("p3p", "CP=\"CAO PSA OUR\"");
}