Facebook粉丝页面应用 [英] Facebook fan page app

问题描述

我已经使用C#SDK构建了一些Facebook应用程序.并使用下面的代码检查用户是否喜欢该粉丝页面并显示相应内容.

I've built a few facebook apps using the c# sdk. and using code below to check if the user has liked the fan page and showing content to reflect that.

protected void Page_Load(object sender, EventArgs e)
{
    if (Session["SignedRequest"] != null)
    {
        signedRequest = Session["SignedRequest"].ToString();
    }
    else
    {
        signedRequest = Request.Form["signed_request"];
    }

    if (!string.IsNullOrEmpty(signedRequest))
    {
        dynamic SignedRequestData;
        var DecodedSignedRequest = FacebookWebContext.Current.SignedRequest.Data;
        SignedRequestData = DecodedSignedRequest

        var RawRequestData = (IDictionary<string, object>)SignedRequestData;

        foreach (KeyValuePair<string, object> paird in RawRequestData)
        {
            Response.Write("key =" + paird.Key.ToString() + " value =" + paird.Value.ToString() + "<br/>");

        }

        if (RawRequestData.ContainsKey("page"))
        {
            Facebook.JsonObject RawPageData = (Facebook.JsonObject)RawRequestData["page"];

            if (RawPageData.ContainsKey("liked"))
            {
                if (bool.Parse(RawPageData["liked"].ToString()))
                {
                    LikedContent.Visible = true;

                    if (!IsPostBack)
                    {
                        PageSetup();
                    }
                }
                else
                {
                    UnlikedContent.Visible = true;
                }
            }
            else
            {
                UnlikedContent.Visible = true;
            }
        }
        else
        {
            DefaultContent.Visible = true;
        }
    }
    else
    {
        DefaultContent.Visible = true;
    }
}

此问题是，如果我在应用程序上有多个页面，则会遇到跨域问题.可以很容易地解决此问题，例如使用gloabl.asac.cs文件中的p3p标头. 问题仍然存在于野生动物园中.

The problem with this is that if i have multiple pages on the app i get cross domain issues. can fix this quite easily for ie using the p3p header in the gloabl.asac.cs file. the issue however still remains in safari.

现在，C#sdk的当前版本6建议使用facebook javascript sdk来调用打开的图形并检查用户是否喜欢页面，然后将其传递给我想知道什么是最好的背后的代码制作Facebook粉丝页面标签应用的实践?

Now that the current version 6 of the c# sdk recommends using the facebook javascript sdk to call the open graph and check that the user likes a page and then pass it to the code behind i was wanting to know what actually is the best practice for building facebook fan page tab apps?

每当我使用javascript sdk访问用户信息时，我都会弹出一个框来授权该应用程序.我不要这个有办法解决这个问题吗?

When ever i access the users information using the javascript sdk i get a pop up box to authorise the app. i don't want this. is there a way round this?

欢呼

推荐答案

您可以在后面的代码中调用这样的图形api方法

You can call graph api method like this in code behind

void CallFacebookApi(string oAuthToken, string userId)
{       
string userLikeUrl = "https://graph.facebook.com/me/Likes/" + pageId +"?access_token=" + oAuthToken;

  response = requestFBData(userLikeUrl);
  if (response.Length > 0)
    {

     JObject userLike = JObject.Parse(response);
     int count = userLike["data"].Count();

     if (count > 0){
     //user liked your page.
     } 
     else {
      //user do not liked your page yet
      }
    }

 }

public string requestFBData(string action)
{
   string results = string.Empty;

    try
    {
     HttpWebRequest req = (HttpWebRequest)WebRequest.Create(action);
     HttpWebResponse resp = (HttpWebResponse)req.GetResponse();

     StreamReader sr = new StreamReader(resp.GetResponseStream());
     results = sr.ReadToEnd();
     sr.Close();
    }
    catch (Exception e)
    {
      if (e.Message.Contains("400"))
      {
       //invalid reponse
      }
    }

    return results;
  }

这篇关于Facebook粉丝页面应用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！