asp.net - Facebook API, Using FB Connect on email address -

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ASP.Net C # and faceback connect.

I'm connecting Facebook to my site. If a new user joins through FB, then I can create an account for them and all are OK. What I would like to do to see if they already have a registered account

So if a person who has not logged in but has an account, then in my application, I want to be able to find as a link. I hope this can be done via email address?

Any thoughts

thanks

Richard

Update: You need :

Use this method to create a connection between the user account on your site and the user's Facebook account. The user has not been connected to the earlier accounts.

This method contains an array of account data, including the required data_hesh and optional account data. For each connected account, if the user is present, the information has been added to the user's set of accounts. If the user has already authorized the site, the connect account has been added to the confirmation state. If the user has not yet authorized the site, then the linked account is added to the pending state.

If users deactivate their external user account, call call.unregisterUsers. To get the number of friends present in a user's pending state, use Connect. Connect Now Connected Friends Numbers


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