Question

I am trying to make a basic Silverlight Class Library in Silverlight 4 to return basic Facebook Information using Facebook s Graph API, but I am only getting empty strings being returned. I am using the following code:

string _Response = "";

    public string GetFacebookMe(string access_token)
    {
        WebClient facebookClient = new WebClient();
        facebookClient.DownloadStringCompleted += new DownloadStringCompletedEventHandler(facebookClientDownloadStringCompleted);
        facebookClient.DownloadStringAsync(new Uri("https://graph.facebook.com/me" + "?access_token=" + access_token));
        string ret = _Response;

        return ret;
    }

    private void facebookClientDownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
    {
        if (e.Error == null)
        {
            _Response = e.Result;
        }
        else
        {
            _Response = e.Error.Message;
        }
    }

I tried while debugging to init _Response to the value "Default", and the string "Default" was consequently being returned. I have been messing with this for a while and I m not sure where I m going wrong.

提前感谢!

Answer 1

这意味着要作出大量努力,直接使用网上电话。在使用银灯和Net Framework 4.0时,可使用

Prabir Shrestha在这一博客中很好地涵盖了SDK的使用。

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