The type initializer for 'Facebook.FacebookApplication' threw an exception_问答_开发者

The type initializer for 'Facebook.FacebookApplication' threw an exception

开发者 https://www.devze.com 2023-04-09 16:31 出处：网络

I am using Facebook APIs w/ oAuth using their Javascript SDK to sign in, and setting oAuth = true. I can from the SDK sign in successfully, and get my xfbml to render properly.

I am using the Facebook C# sdk to retrieve the user ID and post to FB. I wrote a small test page that does this.

HTML is:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="fbtest.aspx.cs" Inherits="fbtest" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

        ID:<asp:label runat="server" text="Label" ID="Userid"></asp:label><div />
        <asp:label runat="server" text="Label" ID="FacebookTokenLabel"></asp:label>
    </div>
    </form>
</body>
</html>

The Code behind is:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Facebook;
using Facebook.Web;
public partial class fbtest : System.Web.UI.Page
{
    private FacebookWebClient _facebookApp; 
    protected void Page_Load(object sender, EventArgs e)
    {
        try
        {
          //  FacebookWebContext fbWebContext = FacebookWebContext.Current;
          //  FacebookTokenLabel.Text += fbWebContext.AccessToken;

           FacebookWebClient fb = new FacebookWebClient();
           dynamic me = fb.Get("me");

           FacebookTokenLabel.Text = me.name;
           Userid.Text = me.id;
        }
        catch (Exception ex)
        {
           FacebookTokenLabel.Text =  ex.Message + ":" + ex.StackTrace;
        }
    }
}

I tried on all browsers (IE9, chrome 14.0.835.186 m and FF 6.0.2) and i get the same exception:

ID:Label
The type initializer for 'Facebook.FacebookApplication' threw an exception.:
at Facebook.FacebookApplication.get_Current() in e:\Prabir\Documents\Projects\facebooksdk\v5.2.1\Source\Facebook\FacebookApplication.cs:line 48
at Facebook.Web.FacebookWebContext..ctor() in         e:\Prabir\Documents\Projects\facebooksdk\v5.2.1\Source\Facebook.Web\FacebookWebContext.cs:line 48 
at Facebook.Web.FacebookWebContex开发者_开发问答t.get_Current() in e:\Prabir\Documents\Projects\facebooksdk\v5.2.1\Source\Facebook.Web\FacebookWebContext.cs:line 96 
at fbtest.Page_Load(Object sender, EventArgs e) in c:\inetpub\vhosts\beirutna.com\subdomains\beta\httpdocs\fbtest.aspx.cs:line 16

You can try yourself: http://beta.beirutna.com and log in on the top right, it will show your user name and tile. Then go to: http://http://beta.beirutna.com/fbtest.aspx

Check your inner exception

In my case it revealed: Request for ConfigurationPermission failed while attempting to access configuration section 'facebookSettings'. To allow all callers to access the data for this section, set section attribute 'requirePermission' equal 'false' in the configuration file where this section is declared.