How to get ids of facebook invited friends by user in my asp.net4.0 web application - facebook

Question

I am developing an ASP.NET application. I implemented Facebook JavaScript API in my application, for connect with Facebook and get FB friend list of user. I had done this successfully.
Now, I want to count how many friends are invited by user. Is it possible with facebook API. User can select multiple friends and i want to count how many friends selected and invited by user, Invited friends Id is bonus if We can get.
Please don't forget that facebook changed its Oauth settings for security reasons.
I'm also trying to get ids values after Send Invitation button clicked and page post back to
if (Request.Form["ids"] != null)
{
span1.InnerHtml = "ids";
//put success code here..
}
else
{
span1.InnerHtml = "oops no id";
}
if (Page.PreviousPage != null)
{
span1.InnerHtml = "ids";
//put success code here..
}
else
{
span1.InnerHtml = "oops no id";
}
but in this case program control always goes to else condition it means after page is post back form return null value.
Is there any way to get ids of invited friends.
Thanks.

Answer 1

If you using Facebook Requests to send invites (you really should, it's intended for this), the only way to get invited friends is via Facebook Requests Dialog callback:
FB.ui({method: 'apprequests', message: 'Whoa!'}, callback);
function callback(response){
// response.to now contain array of invited users ids
console.log('Invited friends ids', response.to);
if (response.request) {
console.log('Efficient Request id', response.request);
} else {
console.log('Requests Ids', response.request_ids);
}
}
There is no way to get request sent by user via Graph API or FQL, you only can get requests received by user. You may save all requests sent by your users and rely on this data if you need aggregated count of invitation sent...

Answer 2

Ok finally I resolve this issue and get invited friends ids..
As we know we use javascript sdk for FB connect so my solution is in concern of Java script:
Just make on change in your .js file where you put your facebook connect javascript code. Use Get or Request Method instead of Post Method in fb:request-form tag.
<script type="text/javascript>
var fbhtml = "<fb:serverFbml width=\"" + width_of_invitation_div + "\">
<script type=\"text/fbml\"><fb:fbml><fb:request-form action=" + window.location + " method="REQUEST" invite="true" type="" + type_of_fb_request_form + "" hold=" /><br mode="></fb:request-form></fb:fbml></script></fb:serverfbml>"
</script>
After invitation send to users selected friends you get ids[] in url.
you can get these ids through query string and split ids by comma(,) and store in array.
Hope this will help for other devs.