An access token is required to request this resource FQL issue - facebook-graph-api

Question

I have a command line application which executes a query. Here is the code.
Problem is that it receives an access token of the form "abc...|xyz...". There is
no session portion. But the token returned is useless for executing my query to
select insights for a page of mine. Help !!
const string permissions = "manage_pages,read_insights,offline_access";
dynamic oauthClient = new FacebookOAuthClient() ;
oauthClient.AppId = username ;
oauthClient.AppSecret = password ;
dynamic parameters = new ExpandoObject() ;
parameters.scope = permissions ;
parameters.response_type = "token" ;
// parameters.grant_type = "client_credentials" ;
dynamic result = oauthClient.GetApplicationAccessToken(parameters);
string token = result.access_token ;
// token comes back as "abc...|xyz..."
var fb = new FacebookClient(token);
string query = " select metric, value " +
" from insights " +
" where object_id = MY_PAGE and " +
" metric in ( 'page_impressions' , 'page_stories') and " +
" end_time >= end_time_date('2012-02-21') and " +
" end_time <= end_time_date('2012-02-11') and " +
" period = period('day') " ;
dynamic result2 = fb.Query(query) ; // Exception generated on this line.
return result2 ;
Any ideas?

Answer 1

The error you are getting is from Facebook and it is simply saying you don't have a valid token to make the request. You must request a user access token using OAuth. After you have a valid access token you can make your request with the following code:
var fb = new FacebookClient("valid_user_access_token");
string query = "YOUR FQL QUERY HERE";
dynamic result = fb.Query(query);
To learn how to get a valid access token read the Facebook documentation here: https://developers.facebook.com/docs/authentication/